Highlights of Materials Physics (DMP) Talks @ APS 2020 March Meeting (2)
American Physics Society (APS) March meeting is one of the largest physics meetings in the world. In 2020, the meeting was canceled due to concerns over the rapid spread of COVID-19.
To help the community quickly catch up on the work to be presented in this meeting, Paper Digest Team processed all talk abstracts, and generated one highlight sentence (typically the main topic) for each. Readers are encouraged to read these machine generated highlights / summaries to quickly get the main idea of each talk. This article is on the talks related to Materials Physics (DMP).
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TABLE : Materials Physics (DMP) 2
| Title | Authors | Highlight | Session | |
|---|---|---|---|---|
| 999 | Advances in Non-Fullerene Organic Photovoltaics | Jenekhe, Samson | In this talk I will discuss our work in both of the main classes of OPV devices: (i) all-polymer solar cells (all-PSCs) composed of both donor and acceptor polymers; and (ii) blends of a small-molecule non-fullerene acceptor (NFA) with a donor polymer. | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1000 | Revealing the Microstructure of the Active Layer of Ternary Organic Solar Cells using Energy-Filtered TEM | Ayhan, Ismail Alperen; Gomez, Enrique | Here, we demonstrate high-efficiency devices by combining the organic semiconductors with complementary light absorption, using PTB7-Th as donor, and IDIC, COi8DFIC, Eh-IDTBR, and O-IDTBR as acceptors. | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1001 | Solution Processed Organic and Inorganic Transistors – Application in Inverter Circuits | Barron, John; Pickett, Alec; Glaser, James; Guha, Suchismita | Solution Processed Organic and Inorganic Transistors – Application in Inverter Circuits | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1002 | Electric field-induced second harmonic generation imaging of organic thin-film devices | BHATTACHARYA, PAYAL; Ostroverkhova, Oksana; Yu, Ping; Guha, Suchismita | Electric field-induced second harmonic generation imaging of organic thin-film devices | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1003 | Structure of vapor-deposited glasses within a few nanometers of organic-organic interfaces is bulk-like | Fiori, Marie; Bagchi, Kushal; Toney, Michael; Ediger, Mark | In this work, we prepare PVD films made of 60 alternating 10 nm layers of organic semiconductors, DSA-Ph and Alq3, creating 60 interfaces. | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1004 | Polymer light-emitting diodes with an emitting layer based on a nano-confined semiconducting polymer blend | Ribeiro, Anielen; Landfester, Katharina; Blom, Paul; Michels, Jasper | Polymer light-emitting diodes with an emitting layer based on a nano-confined semiconducting polymer blend | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1005 | Sub-Turn-on Exciton Quenching Modulated by Spontaneous Orientation Polarization in Organic Light-Emitting Devices | Bangsund, John; Van Sambeek, Jack; Holmes, Russell | Here, we show that electron transport layers exhibiting SOP induce substantial exciton quenching prior to device turn-on, reducing the peak external quantum efficiency by ~20% relative to layers without SOP. | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1006 | Influence of Acceptor Type and Polymer Molecular Weight on the Mechanical and Photovoltaic Properties of Polymer Solar Cells | Kim, Bumjoon | Here, we present a comparative study of the mechanical properties of small-molecule acceptor (SMA)-based, polymer acceptors (PA)-based, and fullerene-based PSCs. | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1007 | Mechanically-durable high performance OPVs using semi-interpenetrating networks | Hu, Zhiqi; Sun, Changxu; Jackson, Joshua; Terlier, Tanguy; Verduzco, Rafael | This work describes a general route to high performance flexible devices and detailed design parameters that influence performance. | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1008 | Mechanically-Robust and High-Performance Thin Film Transistors with Regioregular-block-Regiorandom Poly(3-hexylthiophene) Copolymers | Park, Hyeonjung; Ma, Boo Soo; Kim, Jin-Seong; Kim, Youngkwon; Kim, Hyeong Jun; Kim, Donguk; Yun, Hongseok; Han, Junghun; Kim, Felix Sunjoo; Kim, Taek-Soo; Kim, Bumjoon | We develop mechanically-robust and high-performance organic thin film transistors (OTFTs) based on poly(3-hexylthiophene) (P3HT) regioblock copolymers ( block-P3HTs). | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1009 | Multiscale-ordered, highly stretchable polymer semiconductor through nanoconfinement | Xu, Jie | To substantially improve their charge carrier mobility under strain, we reported a novel and genetic approach that combines advanced solution processing with nanoconfinement effect to achieve multi-scale ordering and high stretchability in conjugated polymers. | Session 67: Organic Electronics: Microstructure and Mechanical Property |
| 1010 | Band structure probe of near Surface InAs Quantum Wells | Magill, Brenden; Khodaparast, Giti; Thapa, Sunil; Stanton, Christopher; Yuan, Joseph; Hatefipour, Mehdi; Mayer, William; Dartiailh, Matthieu; Sardashti, Kasra; Wickramasinghe, Kaushini; Shabani, Javad; Matsuda, Y. H.; Yang, Zhuo; Kohama, Yoshimitsu | In this talk, we present a combined experimental and theoretical approach to study the band structure of these QWs. | Session 68: Spins in Non-magnetic Semiconductors |
| 1011 | Weak-antilocalization Induced by Spin-orbit Interaction in Two-dimensional Tellurium | Niu, Chang; Zhang, Zhuocheng; Qiu, Gang; Wang, Yixiu; Wu, Wenzhuo; Ye, Peide (Peter) | Here we report experimental results regarding weak-antilocalization (WAL) effect in n-type two-dimensional (2D) Te films at cryogenic temperatures. | Session 68: Spins in Non-magnetic Semiconductors |
| 1012 | Magneto-optical properties of n-type InAsP films in ultrahigh magnetic fields | Thapa, Sunil; Stanton, Christopher; Magill, Brenden; Herath Mudiyanselage, Rathsara; Khodaparast, Giti; Matsuda, Y. H.; Yang, Zhuo; Kohama, Yoshimitsu; Choi, Sukgeun; Palmstrom, Chris | We present a theoretical/experimental study of the magneto-optical properties of n-type InAs xP 1−x films (x=0.07,0.34) in ultrahigh magnetic fields in the Faraday’s geometry at T=300 K using k.p method with modified 8-band Pidgeon-Brown model. | Session 68: Spins in Non-magnetic Semiconductors |
| 1013 | Ultralong spin coherence in MAPbI3 single crystals revealed by ultrafast optics | Yao, Yue; Sheffield, Matthew; Hewa Walpitage, Heshan; Brown Heft, Isaac; Liu, Ye; Ni, Zhenyi; Huang, Jinsong; Li, Yan | Here, in order to exclude the influence of the polycrystalline structure and obtain intrinsic spin dynamics, we investigate spin dynamics on high quality MAPbI 3 single crystals by time-resolved Faraday rotation (TRFR). | Session 68: Spins in Non-magnetic Semiconductors |
| 1014 | Probing the cubic crystal anisotropy and spin-orbit interaction in GaAs heterostructures using hole quantum point contacts | Hudson, Karina; Srinivasan, Ashwin; Miserev, Dmitry; WANG, Qingwen; Klochan, Oleh; Farrer, Ian; Ritchie, David; Hamilton, Alex | We find the anisotropy of the g-factor is strongly dependent on QPC orientation, and present a theoretical framework describing the SOI terms arising from cubic crystal anisotropy. | Session 68: Spins in Non-magnetic Semiconductors |
| 1015 | Origin of Rashba-Dresselhaus effect in a Pb-free ferroelectric nitride perovskite. | Bandyopadhyay, Subhadeep; Dasgupta, Indra | A systematic study of orthorhombic and rhombohedral phases of this system reveal the importance of symmetry in realizing the nature of the splitting of bands around the time reversal invariant k-points. | Session 68: Spins in Non-magnetic Semiconductors |
| 1016 | Efficient spin to charge conversion at strained amorphous-Si thin film interfaces | Bhardwaj, Ravindra; Katailiha, Anand; Lou, Paul; Kumar, Sandeep | This study gives a new direction of research for spin-caloritronics applications using strain engineering and amorphous materials. | Session 68: Spins in Non-magnetic Semiconductors |
| 1017 | Dephasing in quasi-1D wires: Non-Markovian noise and correlations due to itinerant spin interactions | Foster, Matthew; Davis, Seth | Motivated by the interest in many-body localization, we revisit the problem of dephasing due to electron-electron scattering in quasi-1D (many channel) wires. | Session 68: Spins in Non-magnetic Semiconductors |
| 1018 | Radial spin texture in elemental tellurium with chiral crystal structure | Sakano, Masato; Hirayama, Motoaki; Takahashi, Takanari; Akebi, Shuntaro; Nakayama, Mitsuhiro; Kuroda, Kenta; Taguchi, Kazuaki; Yoshikawa, Tomoki; Miyamoto, Koji; Okuda, Taichi; Ono, Kanta; Kumigashira, Hiroshi; Ideue, Toshiya; Iwasa, Yoshihiro; Natsuki, Mitsuishi; Ishizaka, Kyoko; Shin, Shik; Miyake, Takashi; Murakami, Shuichi; Sasagawa, Takao; Kondo, Takeshi | To reveal the spin textures of chiral crystals, here we investigate the spin and electronic structure in p-type semiconductor elemental tellurium by using spin- and angle-resolved photoemission spectroscopy. | Session 68: Spins in Non-magnetic Semiconductors |
| 1019 | Prediction of momentum dependent spin splitting in antiferromagnetic compounds without spin-orbit coupling | Yuan, Linding; Wang, Zhi; Luo, Jun-Wei; Zunger, Alex | We identify the magnetic symmetry conditions that produce AFM prototypes having spin splitting even at TRIM points without external magnetic field and even when SOC is set to zero. | Session 68: Spins in Non-magnetic Semiconductors |
| 1020 | Response of Bloch Electrons to Electric Fields | Kerr, William | We find for this model that the anomalous velocity is dominated by the term coming from the spin operator rather than the position operator. | Session 68: Spins in Non-magnetic Semiconductors |
| 1021 | Birefringent Spin-Lasers | Cao, David Jiayu; Xu, Gaofeng; Labinac, Velimir; Zutic, Igor | By using transparent rate equations we explain how the birefringence can provide key differences in the modulation frequency of the intensity and polarization of light emitted from a laser. | Session 68: Spins in Non-magnetic Semiconductors |
| 1022 | Modeling of the Mn-Carrier Exchange Interaction in Colloidal CdSe/CdMnS Nanoplatelets with a Multilayer Core and Magnetically Doped Shell | Pientka, James; Najafi, Arman; Tarasek, Steven; Delikanli, Savas; Zhang, Peiyao; Norden, Tenzin; Shendre, Sushant; Sharma, Manoj; Bhattacharya, Arinjoy; Taghipour, Nima; Demir, Hilmi; Petrou, Athos; Thomay, Tim | Here, we present a model that includes the carrier mediated exchange interaction and study its effect on the excitonic wavefunction. | Session 68: Spins in Non-magnetic Semiconductors |
| 1023 | Correlated States and Frustration in Magnetic Quantum Dots with Multiple Occupancy | Campos, Tiago; Pientka, James; Matos Abiague, Alex; Han, Jong E; Zutic, Igor | Using exact diagonalization and conditional probability density we reveal peculiar manifestations of strongly-correlated states in Mn-doped QDs. | Session 68: Spins in Non-magnetic Semiconductors |
| 1024 | Theory of Excitonic Phases in an Electron-Hole Double-Layer System with Relativistic Spin-Orbit Interaction | Zhang, Yeyang; Chen, Ke; Shindou, Ryuichi | We propose helicoidal and helical excitonic insulator phases in a Coulomb-coupled two-dimensional electron-hole double layer (EHDL) system with relativistic spin-orbit interaction. | Session 68: Spins in Non-magnetic Semiconductors |
| 1025 | Single-crystal neutron diffraction study of Dirac material EuMnSb2 | Wilde, John; Ueland, Benjamin; Riberolles, Simon; Ryan, Dominic; Kreyssig, Andreas; Vaknin, David; Heitmann, Thomas; Liu, Yong; Bud’ko, Sergey; McQueeney, Robert | Here we present results from single-crystal neutron diffraction experiments on EuMnSb 2. | Session 69: Magnetic Weyl semimetals |
| 1026 | Visualization of Antiferromagnetic Domain Walls in the Topological Semimetal EuMnBi2 | Ge, Wenbo; Sass, Paul; Wu, Weida; Obeysekera, Dimuthu; Yang, Junjie | In this talk we will present magnetic imaging of AFM domain walls (DW) and their evolution across the spin-flop transition in the topological semimetal EuMnBi 2 using our cryogenic magnetic force microscope 2. | Session 69: Magnetic Weyl semimetals |
| 1027 | Signature of spin-fermion coupling in the magnetic excitations of Dirac semimetal YbMnBi2. | Sapkota, Aashish; Zaliznyak, Igor; Tranquada, John; Classen, Laura; Petrovic, Cedomir; Wang, Aifeng; Stone, Matthew; Savici, Andrei; Garlea, Vasile | Previous studies of spin excitations in (Sr,Ca)MnBi 2 using inelastic neutron scattering (INS) have found no indication of such coupling because anomalous broadening found in itinerant magnets was absent [2]. | Session 69: Magnetic Weyl semimetals |
| 1028 | A Charge Density Wave Transition in NaxMnBiy magnetic semimetal | Louca, Despina; Wegner, Aaron | Here, we show that upon cooling below the magnetic transition, a spatial modulation appears due to charge and defect ordering in a checkerboard pattern, with two kinds of displacement vectors q 1=(2/3, 0, 1) and q 2=(2/3, 1/3, 1/2). | Session 69: Magnetic Weyl semimetals |
| 1029 | Exotic phenomena in topological Weyl line magnets | Belopolski, Ilya; Chang, Guoqing; Cochran, Tyler; Yin, Jiaxin; Zhang, Songtian Sonia; Cheng, Zijia; Yang, Xian; Shumiya, Nana; Multer, Daniel; Litskevich, Maksim; Hasan, Zahid | I will present the observation of Weyl lines by ARPES in the room temperature magnet Co 2MnGa [1]. | Session 69: Magnetic Weyl semimetals |
| 1030 | Band splitting and signatures of Fermi-arcs in the magnetic Weyl candidate CeBi | Liu, Yu; Matt, Christian; Pirie, Harris; Drucker, Nathan; Slager, Robert-Jan; Jo, Na Hyun; Kuthanazhi, Brinda; Bud’ko, Sergey; Canfield, Paul; Hoffman, Jennifer | Here we present a scanning tunneling microscopy and quasiparticle interference (QPI) study of the magnetic Weyl semimetal candidate CeBi. | Session 69: Magnetic Weyl semimetals |
| 1031 | Magnetic semimetals and quantized anomalous Hall effect in EuB6 | Nie, Si-Min | Here we predict that \soft" ferromagnetic (FM) material EuB 6 can achieve multiple topological semimetal phases by simply tuning the direction of the magnetic moment. | Session 69: Magnetic Weyl semimetals |
| 1032 | Real-space imaging of surface-magnetism in magnetic Weyl semimetal candidate CeBi | Matt, Christian; Liu, Yu; Drucker, Nathan; Pirie, Harris; Slager, Robert-Jan; Jo, Na Hyun; Kuthanazhi, Brinda; Bud’ko, Sergey; Canfield, Paul; Hoffman, Jennifer | Here we use spin-polarized scanning tunneling microscopy to map the magnetic structure on the surface of CeBi at various bulk-magnetic phases. | Session 69: Magnetic Weyl semimetals |
| 1033 | Effect of chemical substitution on the anomalous Hall effect of chiral-lattice antiferromagnet CoNb3S6 | Michel, Dina; Thapa Magar, Nishchal; Bishop, Nicholas; Poudel, Lekhanath; Lynn, Jeffrey; Mitchell, John; Ghimire, Nirmal | Here we will show that partial substitution of Co by Fe widens the temperature range and that the AHE in Co 1-xFe xNb 3S 6 saturates at lower temperatures. | Session 69: Magnetic Weyl semimetals |
| 1034 | In-plane antiferromagnetic moments in axion topological insulator candidate EuIn2As2 | Zhang, Yang; Deng, Ke; Zhang, Xiao; Wang, Meng; Liu, Cai; Schwier, Eike; Kumar, Shiv; Chen, Chaoyu; Shen, Bing | In this paper, we report a systematic study of the axion topological insulator candidate EuIn 2As 2. | Session 69: Magnetic Weyl semimetals |
| 1035 | Determination of the magnetic order in the EuIn2As2, an axion insulator candidate | Riberolles, Simon; Kuthanazhi, Brinda; Jo, Na Hyun; Kaminski, Adam; Canfield, Paul; Heitmann, Thomas; Ryan, Dominic; Ueland, Benjamin; McQueeney, Robert | Here, we present results from single-crystal magnetic diffraction experiments. | Session 69: Magnetic Weyl semimetals |
| 1036 | Anomalous Hall effect with colossal magnetic saturation and coercivity in (111)-oriented pyrochlore Eu2Ir2O7 thin films | Liu, Xiaoran; Ge, Wenbo; Kareev, Mikhail; Wen, Fangdi; Choi, Eun; Wu, Weida; Chakhalian, Jak | Anomalous Hall effect with colossal magnetic saturation and coercivity in (111)-oriented pyrochlore Eu2Ir2O7 thin films | Session 69: Magnetic Weyl semimetals |
| 1037 | Domain Wall-Dependent Electrical Transport in a Magnetic Weyl Semimetal | Quirk, Nicholas; Chen, Guangming; Yao, Nan; Ong, N. Phuan | Domain Wall-Dependent Electrical Transport in a Magnetic Weyl Semimetal | Session 69: Magnetic Weyl semimetals |
| 1038 | Imaging the Electronic Structures in Antiferromagnetic Dirac Semimetal GdSbTe | Venkatesan, Balaji; Su, Chih-Chuan; Babu, Ramesh; Sankar, Raman; Chou, Fangchang; Guo, Guang-Yu; Chuang, Tien-Ming | By using spectroscopic imaging – scanning tunneling microscopy and first principle calculation, we investigated the surface and bulk electronic structures in GdSbTe across the magnetic transition and under magnetic field. | Session 69: Magnetic Weyl semimetals |
| 1039 | Interplay between topology and magnetic excitations in topological nodal semimetal CeAlGe | Nguyen, Thanh; Li, Mingda; Han, Fei; Andrejevic, Nina; Pablo Pedro, Ricardo; Stone, Matthew; Chi, Songxue; Fernandez-Baca, Jaime; Matsuda, Masaaki; Tennant, David | In this talk, I will present results obtained from neutron scattering experiments performed on predicted type-II WSM, CeAlGe. | Session 69: Magnetic Weyl semimetals |
| 1040 | Tuning the electronic and thermoelectric response of oxide superlattices by confinement, strain and interface polarity | Pentcheva, Rossitza | By combining DFT+ U calculations and Boltzmann transport theory we explore the implications of interface polarity, confinement and strain on the thermoelectric properties of perovskite superlattices. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1041 | MBE-grown BaTiO3 films for waste heat energy conversion using first order phase transformation | Nunn, William; Bucsek, Ashley; Wegner, Maike; Quandt, Eckhard; James, Richard; Jalan, Bharat | A new method for heat to electricity conversion which takes advantage of the first order phase transformation of ferroelectric materials will be presented. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1042 | Artificial two-dimensional ferroelectric metal at room temperature | Kareev, Mikhail; Cao, Yanwei; Wang, Zhen; Park, Se Young; Yuan, Yakun; Liu, Xiaoran; Nikitin, Sergey; Akamatsu, Hirofumi; Meyers, Derek; Middey, Srimanta; Thompson, Paul; Ryan, Philip; Shafer, Padriac; N’Diaye, Alpha; Arenholz, Elke; Gopalan, Venkatraman; Zhu, Yimei; Rabe, Karin; Chakhalian, Jak | Here we report on the realization of a room temperature two-dimensional ferroelectric metal in a tri-color superlattice BaTiO3/SrTiO3/LaTiO3. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1043 | Tuning the correlation strength via cation order in double perovskites | Birol, Turan; Paul, Arpita | In this talk, we study the V-Nb double perovskites, where V and Nb ions attain different valences despite coming from the same column in the periodic table. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1044 | Ferroelectric Polarization Induced Magnetic Order and Topological Hall Effect at the PbZr0.2Ti0.8O3/SrIrO3 Heterointerface | Zhang, Le; Han, Myung-Geun; Zhu, Yimei; Hong, Xia | In this study, we explore the possibility of inducing magnetic order and nontrivial chiral spin structures in ultrathin SIO films using the polarization field of a neighboring ferroelectric layer. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1045 | Charge Engineering in Nickelate-based Mott Transistors Gated by Ferroelectrics | Hao, Yifei; Chen, Xuegang; Zhang, Le; Hong, Xia | We present a comprehensive study of ferroelectric-gated Mott transistors based on high quality epitaxial heterostructures composed of a ferroelectric Pb(Zr,Ti)O 3 (PZT) gate and a correlated oxide RNiO 3 ( R = La, Nd, Sm) channel. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1046 | Spin-dependent charge transport in crystalline BaTiO3-germanium tunnel junctions | Jia, Yichen; Ahn, Charles; Walker, Frederick | Here we measure spin-dependent transport in Permalloy-BaTiO 3-Ge tunnel junctions using the three-terminal Hanle technique. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1047 | In plane strained Barium Titanate thin films directly integrable on Silicon | Reynaud, Marc; Chen, Pei-Yu; Kwon, Sunah; Edmonson, Bryce; Kim, Moon; Ekerdt, John G.; Posadas, Agham; Demkov, Alexander | Here, we present a method for the growth of single crystal BTO films that are entirely in plane and strain tunable. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1048 | Switching Rashba spin texture via interface with a ferroelectric compound | Zhang, Xiaoli; Mera, Carlos; Zunger, Alex | We study the microscopic factors controlling the switching of a Rashba(R) spin texture by switching the ferroelectric (FE) polarization of an underlying FE substrate. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1049 | Reversal of Tunneling Electroresistance in Ferroelectric Tunnel Junctions by Interface Engineering | Li, Ming; Tao, Lingling; Tsymbal, Evgeny | In this work, using density functional theory calculations, we demonstrate the crossover between the electron-like and hole-like tunneling in a practical FTJ La 1-xSr xMnO 3/BaTiO 3/Pt with positive (La 1-xSr xO) 1-x/(TiO 2) 0 and negative (MnO 2) x -1/(BaO) 0 interface terminations. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1050 | Effect of Strain and Doping on the Magnetoelectric Coupling at LSMO/PZT Multiferroic Interfaces: An Ab Initio Study | Acharya, Krishna; Vasiliev, Igor | We apply ab initio methods based on density functional theory (DFT) to study the influence of strain on the magnetoelectric coupling at the (0,0,1) interface between PZT (PbZr 0.2Ti 0.8O 3) and LSMO at two different doping levels (La 0.5Sr 0.5MnO 3 and La 0.8Sr 0.2MnO 3). | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1051 | Effect of confinement and octahedral rotations on the electronic, magnetic, and thermoelectric properties of SrXO3/SrTiO3(001) superlattices, (X = V, Cr, and Mn) | Verma, Manish; Geisler, Benjamin; Pentcheva, Rossitza | Here we explore the effect of confinement and octahedral rotations on the electronic and thermoelectric properties of (Sr XO 3) 1/(SrTiO 3) n(001) ( X = V, Cr, and Mn; n = 1, 3) superlattices by combining ab-initio simulations including an on-site Coulomb repulsion term and Boltzmann theory. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1052 | Depth-resolved electronic structure of a BiFeO3/La0.7Sr0.3MnO3 superlattice investigated by standing-wave hard X-ray photoemission spectroscopy (SW-HXPS) | Martins, Henrique; Gray, Alexander; Conti, Giuseppina; Vishik, Inna; Nemsak, Slavomir | Studies of artificially designed interfaces of transition metal oxide heterostructures enable opportunities to engineer new stable phases of matter, leading to novel complex devices. | Session 70: Thermoelectricity, Ferroelectricity, and Dielectric Behavior of Complex Oxide Films and Heterostructures |
| 1053 | Dynamics of a pyrochlore quantum spin liquid NaCaNi2F7 | Zhang, Shu; Changlani, Hitesh; Plumb, Kemp; Tchernyshyov, Oleg; Moessner, Roderich | We combine analytical theory and numerical approaches to elucidate the nature of this enigmatic spin-liquid state [3]. | Session 71: Pyrochlores: Spin Liquids |
| 1054 | Magnetic field dependence of magnetic correlations in a pyrochlore Heisenberg antiferromagnet | De la Torre, Alberto; Krizan, Jason; Xu, Guangyong; Cava, Robert; Plumb, Kemp | We present here a set of neutron scattering measurements in NaCaNi 2F 7 as a function of external magnetic field. | Session 71: Pyrochlores: Spin Liquids |
| 1055 | Ultrasound Velocity Measurements in Bond-Disordered Pyrochlore Magnet NaCaCo2F7 | Watanabe, Tadataka; Kato, Hiroya; Hara, Yoshiaki; Krizan, Jason; Cava, Robert | We perform ultrasound velocity measurements in a single crystal of NaCaCo 2F 7. | Session 71: Pyrochlores: Spin Liquids |
| 1056 | Low energy excitations in Tb2Ti2O7 with [111] magnetic field | Zhang, Xinshu; Koohpayeh, Seyed; Armitage, Peter | We perform time-domain terahertz spectroscopy on high quality Tb 2Ti 2O 7 crystal to study the crystal field excitations as a function of magnetic field with very high resolution. | Session 71: Pyrochlores: Spin Liquids |
| 1057 | THz spectroscopy study of the rare-earth pyrochlore Tb2Ti2O7 | Amelin, Kirill; Room, Toomas; Nagel, Urmas; Constable, Evan; Wang, Zhe; Alexanian, Yann; Robert, Julien; Ballou, Rafik; Debrion, Sophie | THz spectroscopy study of the rare-earth pyrochlore Tb2Ti2O7 | Session 71: Pyrochlores: Spin Liquids |
| 1058 | Probing Multipolar Quantum Spin Liquids in non-Kramers Pyrochlore Materials with Magnetostriction. | Patri, Adarsh; Hosoi, Masashi; Lee, SungBin; Kim, Yong-Baek | In this talk, we theoretically propose that spin-lattice coupling can be used as a powerful tool to probe such multipolar QSL phases. | Session 71: Pyrochlores: Spin Liquids |
| 1059 | Half-moon quantum spin liquid in a spin-1/2 J1-J2-J3a Heisenberg antiferromagnet on the pyrochlore lattice | Ghosh, Pratyay; Müller, Tobias; Reuther, Johannes; Thomale, Ronny; Gingras, Michel J; Iqbal, Yasir | Hence, we present a rare scenario wherein thermal and quantum fluctuations act differently. | Session 71: Pyrochlores: Spin Liquids |
| 1060 | Experimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore | Gao, Bin; Chen, Tong; Tam, David; Huang, Chien-Lung; Sasmal, Kalyan; Adroja, Devashibhai; Ye, Feng; Cao, Huibo; Sala, Gabriele; Stone, Matthew; Baines, Christopher; Barker, Joel; Hu, Haoyu; Chung, Jae-Ho; Xu, Xianghan; Cheong, Sang-Wook; Nallaiyan, Manivannan; Spagna, Stefano; Maple, M Brian; Nevidomskyy, Andriy; Morosan, Emilia; Chen, Gang; Dai, Pengcheng | Here we use alternating current magnetic susceptibility, thermodynamic, muon spin relaxation (μSR), and neutron scattering experiments on single crystals of Ce 2Zr 2O 7, a compound isostructural to Ce 2Sn 2O 7, to demonstrate the absence of magnetic ordering/spin-glass down to 20 mK and the presence of a spin excitation continuum at 35 mK. | Session 71: Pyrochlores: Spin Liquids |
| 1061 | Interplay between magnetic exchange, multipolar interactions and virtual crystal field fluctuations in non-Kramers pyrochlore magnets | Jin, Wen; Gingras, Michel J; Alannah, Hallas; Gaudet, Jonathan; Gaulin, Bruce | Via a mean field approach, we show that the proposed model exhibits complex dipolar and quadrupolar phases. | Session 71: Pyrochlores: Spin Liquids |
| 1062 | Crystal Field Excitations in Raman Spectra of Pr-based Pyrochlores | Xu, Yuanyuan; Ohtsuki, Takumi; Man, Huiyuan; Tang, Nan; Baidya, Santu; Zhang, Hongbin; Nakatsuji, Satoru; Vanderbilt, David; Drichko, Natalia | Here we present a study of Pr 2Ir 2O 7 and Pr 2Zr 2O 7, which show magnetic interactions but no ordering down to low temperatures [1-3]. | Session 71: Pyrochlores: Spin Liquids |
| 1063 | Probing Emergent Excitations in Pr2Hf2O7 with Thermal Conductivity | Reid, Jennifer; Froude-Powers, Shaun; Samartzis, Alexandros; Lake, Bella; Hill, Robert | We report thermal conductivity measurements of single crystal samples of PHO as a function of temperature between 50 mK and 50 K and magnetic field up to 12 T. | Session 71: Pyrochlores: Spin Liquids |
| 1064 | A Theoretical Study of Structure Property Relations in Photovoltaic Perovskites | Cowell, Jordan; Bristowe, Nicholas | We find that there is a complex competition between various structural degrees of freedom in the material, which can be manipulated through chemistry and pressure, and that each of the structural modes can strongly tune the band gap. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1065 | Improved Accuracy Tight Binding Model for Finite Temperature Electronic Structure Dynamics in Methyl Ammonium Lead Iodide (MAPbI3) | Abramovitch, David; Tan, Liang | We present a parameterized tight binding model for MAPbI3 capable of predicting instantaneous electronic structures for large systems based on atomic positions extracted from classical molecular dynamics. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1066 | Materials Property Database for Hybrid Organic-Inorganic Perovskites and Application to Stability and Electronic Structure of (PEA)2PbI4 | Qin, Xixi; Du, Xiaochen; Janke, Svenja; Laasner, Raul; Li, Tianyang; Jana, Manoj; Clayton, Connor; Liu, Chi; Bhattacharya, Sampreeti; Mendes, Juliana; Hu, Jun; Seyitliyev, Dovletgeldi; Song, Ruyi; Ropo, Matti; So, Franky; Gundogdu, Kenan; You, Wei; Kanai, Yosuke; Mitzi, David; Blum, Volker | We here present an open database, "HybriD 3" (Design, discovery and dissemination (D 3) of data related to hybrid materials, https://materials.hybrid3.duke.edu), aiming to collect, curate, and make available materials data related to HOIPs. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1067 | First-principles Study of Water Insertion Process on MAPbI3 Surface | Asad, Md. Abdullah; Hada, Masaki; Sato, Kyosuke; Hasegawa, Yoichi; Nagaoka, Ryota; Mishima, Ryuji; Nishikawa, Takeshi; Yamashita, Yoshifumi; Hayashi, Yasuhiko; Tsuruta, Kenji | We computationally investigate an insertion process of water into the methylammonium lead halide perovskite (MAPbI 3), which has been attracting considerable interest during recent years due to its high performance in solar-cell application [1]. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1068 | Theory of Layer Edge States in 2D Halide-Perovskites | Hong, Jisook; Prendergast, David; Tan, Liang | In this talk, we will discuss electronic structures and the origin of the edge states studied using first-principles calculations. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1069 | Calculating band gap distributions of halide perovskites with a first-principles tight-binding approach | Schilcher, Maximilian; Mayers, Matthew; Tan, Liang; Reichman, David; Egger, David | Calculating band gap distributions of halide perovskites with a first-principles tight-binding approach | Session 72: Theory and Computation of Hybrid Perovskites |
| 1070 | Calculations on shallow defect levels in CsPbBr3 | Kang, Jun | Here we proposed a method to calculate the shallow defect levels combining the potential patching and the LDA-1/2 approaches (PP+LDA-1/2). | Session 72: Theory and Computation of Hybrid Perovskites |
| 1071 | Structural and transport studies from air-stable hybrid perovskite thin films | Burns, Randy; Ngqoloda, Siphelo; Arendse, Christopher; Muller, Theophillus; Yesudhas, Sorb; Singh, Deepak; Guha, Suchismita | We demonstrate the feasibility of stable MAPbI 3 thin films grown by a facile two-step low-pressure vapor deposition process in a single reactor. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1072 | Frenkel-Holstein Hamiltonian Applied to Quaterthiophene-based 2D Hybrid Organic-Inorganic Perovskites | Janke, Svenja; Qarai, Mohammad; Blum, Volker; Spano, Frank | Here, we show by the example of quaterthiophene-based lead-halide HOIPs that the organic contribution to 2D HOIP absorption spectra can be theoretically appreciated employing a Frenkel-Holstein Hamiltonian that treats electronic coupling and electron-phonon coupling on equal footing. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1073 | Tunable Electronic Structure of 2D Hybrid Organic-Inorganic Perovskites from a First Principles Approach | Blum, Volker | This talk focuses on computational predictions of the electronic (carrier, i.e., electron- and hole-like) energy levels of new 2D HOIP materials. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1074 | Compounds with high macroscopically- averaged symmetries and low local symmetries: The consequence of lone-pair nematicity on electronic properties | Zhao, Xingang; Wang, Zhi; Zunger, Alex | By calculating in DFT the relaxed total energies of numerous cubic phases of ABX 3 compounds (X=oxygen or halogen) we identify special cases where the energy per formula unit decreases due to atomic displacements as the cubic cell size increases. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1075 | Ligand Design Rules for Improving 2-D Organic-Inorganic Hybrid Halide Perovskite Moisture Stability | Shiring, Stephen; Savoie, Brett | Here, we show that judicious choice in selection of the surface cation for a 2-D perovskite prevents water from penetrating into and dissolving the inorganic layer. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1076 | Interfacial Electromechanics Predict Phase Behavior of 2D Hybrid Halide Perovskites | Price, Chris; Blancon, Jean-Christophe; Mohite, Aditya; Shenoy, Vivek | We propose a thermodynamic model parametrized by first-principles calculations to generate a phase diagram for the q-2DPK. | Session 72: Theory and Computation of Hybrid Perovskites |
| 1077 | Towards Material realizations of 2D Topological Superconductivities in Pb1-xBix Systems | Qin, Wei | In this talk, I will focus possibilities of realizing 2D intrinsic topological superconductivity in a new material family, namely atomic-layer-thin Pb 1-xBi x alloys. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1078 | Volkov-Pankratov states in two-dimensional topological superconductors | Alspaugh, David; Sheehy, Daniel; Goerbig, Mark; Simon, Pascal | We study the in-gap states that appear at the boundaries of two-dimensional topological superconductors. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1079 | Unconventional superconductivity in a doped quantum spin Hall insulator | Di Sante, Domenico; Wu, Xianxin; Fink, Mario; Hanke, Werner; Thomale, Ronny | We find that the common link between the propensity for a topological band gap at pristine filling and unconventional superconductivity at finite doping roots in the longer ranged hybridization integrals on the honeycomb lattice. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1080 | Majorana zero modes by engineering topological kink states in two dimensional electron gas | Cheng, Shuguang; Liu, Jie; Liu, Haiwen; Jiang, Hua; Sun, Qing-Feng; Xie, Xincheng | Here, we propose a flexible route to realize MZMs through 1D topological kink states by engineering a 2D electron gas with antidot lattices, in which both the aforementioned issues can be avoided owing to the robustness of kink states and the intrinsically attainable superconductivity in high-dimensional systems. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1081 | Transport properties of Majorana-Josephson interferometer | Li, Chang-An; Li, Jian; Shen, Shun-Qing | We study the transport properties of Majorana-Josephson interferometer, which is consisted of a two-terminal quantum anomalous Hall insulator strip with two superconducting bars grown over it, to showcase the interference nature of chiral Majorana modes. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1082 | Josephson Interferometry of Zig-Zag Junctions Demonstrating Enhanced Localization | Saydjari, Andrew; Pierce, Andrew; Ren, Hechen; Kosowsky, Michael; Ames, Christopher; Stenho, Martin; Molenkamp, Laurens; Yacoby, Amir | In this work, we provide the first characterization of zig-zag geometry junctions and demonstrate enhanced localization of electrons within the junction. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1083 | Magnetic Skyrmion Induced Topological Superconductivity | Mascot, Eric; Morr, Dirk | Here, we investigate magnet-superconductor heterostructures in which the presence of a magnetic skyrmion lattice gives rise to the emergence of topological superconductivity. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1084 | Tuning Shiba states hybridization on proximitized superconducting surface | Ding, Hao; Hu, Yuwen; Hoffman, Silas; Randeria, Mallika; Deb, Oindrila; Klinovaja, Jelena; Loss, Daniel; Yazdani, Ali | Here we study magnetic Gd adatoms deposited on the surface of epitaxially grown Bi(110) thin films on a superconducting Nb(110) surface using a dilution refrigerator scanning tunneling microscope (STM). | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1085 | RKKY-induced magnetic transition for pairs of magnetic atoms on proximitized superconducting surface | Hu, Yuwen; Ding, Hao; Hoffman, Silas; Randeria, Mallika; Deb, Oindrila; Klinovaja, Jelena; Loss, Daniel; Yazdani, Ali | Here we use atomic manipulation to build magnetic Gd dimers on proximitized superconducting Bi(110) surface with a dilution refrigerator scanning tunneling microscope (STM). | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1086 | Topological superconductivity of adatom chains as probe for unconventional pairing | Kreisel, Andreas; Hyart, Timo; Rosenow, Bernd | Here, we propose a novel paradigm for creating topological superconductivity, which is based on an unconventional superconductor with a chain of non-magnetic impurities on its surface. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1087 | New classification of topological superconductors in 1D magnetic groups | Zou, Jinyu; Song, Zhida; Xu, Gang | We have classified the TSC phase in 1D system with local crystalline time reversal symmetry (LCTRS), where the time reversal symmetry (TRS) is broken, but the combination of TRS with some local crystalline symmetry is preserved. | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1088 | Topological Superconductivity Intertwined with Broken Symmetries | Jin, Hui-Ke; Zhou, Yi; Xu, Dong-Hui | We exploit the Ginzburg-Landau free energy and propose a microscopic two-channel model to study possible superconducting states on the surface of PbTaSe2 . | Session 73: One and Two-Dimensional Topological Superconductivity |
| 1089 | Computing Transport Coefficients of Many-Body Hamiltonians by Equilibrium Averages | Auerbach, Assa; Khait, Ilia; Bashan, Noga | We review continued fractions dynamical conductivity and Hall and Thermal Hall coeffiicents calculations for the Bose and Fermi Hubbard models, and the disordered Heisenberg chain. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1090 | Investigation of the universal scattering rate in PdCrO2 by high energy electron irradiation | Zhakina, Elina; McGuinness, Philippa; Sunko, Veronika; Konczykowski, Marcin; Khim, Seunghyun; Koenig, Markus; Mackenzie, Andrew | We introduced point defects to FIB microstructures of PdCrO 2 by irradiating them with high-energy electrons. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1091 | Quantum Paracrystalline Shear Resonances in Metals | Khoo, Jun Yong; Chang, Po-Yao; Pientka, Falko; Sodemann, Inti | We propose two strategies to excite and probe this unconventional mode. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1092 | Polarizability and magnetoplasmons for the α-T3 model | Gumbs, Godfrey; Dahal, Dipendra; Balassis, Antonios; Iurov, Andrii; Huang, Danhong | Polarizability and magnetoplasmons for the α-T3 model | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1093 | The origin of sub-room temperature ferromagnetism in VSe2 monolayer: reduced dimension and electron correlation | Kim, Taekjung; Ryee, Siheon; Choi, Sangkook; Han, Myung Joon | In this presentation we apply LDA+DMFT (local density approximation plus dynamical mean-field theory) approach to study the magnetic properties of bulk and monolayer VSe 2. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1094 | Modulation of magnetism across the van der Waals interfaces | Matsuoka, Hideki; Bahramy, Mohammad; Wang, Yue; Yoshida, Satoshi; Ishizaka, Kyoko; Iwasa, Yoshihiro; Nakano, Masaki | In the presentation, we will show transport properties of those magnetic heterostructures, and discuss the interface proximity effect on 2D magnetism. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1095 | High-Temperature Ferromagnetic Resonance in FePt Thin Films | Liu, Chuanpu; Srinivasan, Kumar; Ajan, Antony; McCollum, Ethan; Wu, Mingzhong | This presentation reports high- T FMR studies on continuous FePt thin films with cubic structures, rather than L1 0 structures. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1096 | Structure and Magnetism of New Metastable Fe8Co8N2 Compound | Balasubramanian, Balamurugan; Pahari, Rabindra; Valloppilly, Shah; Li, Xingzhong; Skomski, Ralph; Xu, Xiaoshan; Wang, Cai-Zhuang; Ho, Kai-Ming; Sellmyer, David | Guided by theoretical predictions [4], we have produced a new Fe 8Co 8N 2 compound in the form of nanoparticles using a cluster-deposition method and characterized it by XRD, XPS, STEM, EDS and magnetometry measurements. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1097 | Topology on a new facet of bismuth | Lin, Hsin; Hsu, Chuang-Han; ZHOU, XIAOTING; Chang, Tay-Rong; Ma, Qiong; Gedik, Nuh; Bansil, Arun; Xu, Suyang; Fu, Liang | In this talk, we uncover another hidden facet of the band topology of bismuth by showing that bismuth is also a first-order topological crystalline insulator protected by a two-fold rotational symmetry. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1098 | The relation between ferromagnetism and structure in half-metallic transition metal oxides | Saghayezhian, Mohammad; Wang, Zhen; Guo, Hangwen; Jin, Rongying; Zhu, Yimei; Zhang, Jiandi; Plummer, E | We have mapped the phase diagram of this material and discovered that at a specific oxygen pressure and above a critical thickness, a complex magnetic behavior appears. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1099 | Anomalous suppression of higher-order nonlinearities in 3D Dirac semimetals | Lim, Jeremy; Ang, Yee Sin; Ang, Lay Kee; Wong, Liang Jie | Here, we present a counter-intuitive feature of 3D Dirac semimetals that sets them apart from their 2D counterparts: the absence of field-induced intraband nonlinearities beyond the third order at zero temperature at or near a critical field strength. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1100 | Topological Semimetal in a Chiral Crystal with Large Chern Numbers, Multifold Band Crossings, and Long Fermi-arcs | Vergniory, Maia | Using angle-resolved photoelectron spectroscopy and ab- initio calculations, here we show that the chiral topological semimetal candidate PdGa displays the required multifold nodes, which are connected by long surface Fermi-arcs. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1101 | Polar and Phase Domain Walls in Weyl Semimetallic MoTe2: New Paradigm for Topological Interfacial States | Huang, Fei-Ting; Lim, Seong Joon; Singh, Sobhit; Kim, Jinwoong; Zhang, Lunyong; Kim, Jaewook; Chu, M.-W; Rabe, Karin; Vanderbilt, David; Cheong, Sang-Wook | We demonstrate how polar domain walls can be manipulated with electron beams, and show that phase domain walls tend to form superlattice-like structures along the c axis. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1102 | Giant extrinsic anomalous Hall effect in the Kagome, Dirac Antimonide KV3Sb5 | Wang, Yaojia | Here we report the observation of a giant extrinsic AHE in KV 3Sb 5, an exfoliable Dirac semimetal with a spin 1/2 Kagome layer of Vanadium atoms. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1103 | Quantum squeezing and coherence of magnons detected by spin transport | Belzig, Wolfgang; Kamra, Akashdeep | We predict the emergence of novel magnetic quasiparticles, mediated by magnetic dipolar interactions, even for a uniform ground states. | Session 74: Metals: Magnetism, Semi-metals and Topology |
| 1104 | Stabilizing ferromagnetism in the Weyl semimetal candidate EuCd2As2 | Kuthanazhi, Brinda; Jo, Na Hyun; Wu, Yun; Kim, Tae-Hoon; Zhou, Lin; Timmons, Erik; Wang, Lin-Lin; Palasyuk, Andriy; Lee, Kyungchan; Schrunk, Benjamin; Ueland, Benjamin; Burkov, Anton; Prozorov, Ruslan; Bud’ko, Sergey; Kaminski, Adam; Canfield, Paul | [2,3] Here, we present the synthesis and characterization of single crystals of EuCd 2As 2 that, with varying initial stoichiometries, can be tuned from an antiferromagnetic ground state (T N ~ 9.5 K) to a ground state with a clear ferromagnetic component (T C ~ 30 K). | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1105 | A New Magnetic Topological Quantum Material Candidate by Design: EuSn2P2 | Gui, Xin; Pletikosic, Ivo; Cao, Huibo; Tien, Hung-Ju; Xu, Xitong; Zhong, Ruidan; Wang, Guangqiang; Chang, Tay-Rong; Jia, Shuang; Valla, Tonica; Xie, Weiwei; Cava, Robert | Here we report the characterization of high-quality crystals of EuSn2P2, a new quantum material specifically designed to engender unconventional electronic states plus magnetism. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1106 | Angle resolved photoemission spectrocopy study on EuCd2As2 | Jo, Na Hyun; Wu, Yun; Wang, Lin-Lin; Lee, Kyungchan; Kuthanazhi, Brinda; Schrunk, Benjamin; Bud’ko, Sergey L.; Canfield, Paul; Kaminski, Adam | Angle resolved photoemission spectrocopy study on EuCd2As2 | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1107 | Ultrafast carrier dynamics in the ferromagnetic semimetal EuCd2As2 | O’Neal, Kenneth; Mix, LaMoyne; Lee, Min-Cheol; Kuthanazhi, Brinda; Jo, Na Hyun; Bud’ko, Sergey L.; Canfield, Paul; Prasankumar, Rohit; Yarotski, Dzmitry | We report the near-infrared pump-probe ultrafast response of the ferromagnetic candidate for Weyl semimetal EuCd 2As 2. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1108 | Single crystal growth of Weyl semimetal candidates | Krishnan, Sudha; Besara, Tiglet | We utilize metallic self-flux methods to grow single crystals of compounds isostructural to YbMnBi 2 and Co 2MnGa. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1109 | Giant room temperature anomalous Hall effect and magnetically tuned topology in the ferromagnetic Weyl semimetal Co2MnAl | Li, Peigang; Koo, Jahyun; Ning, Wei; Li, Jinguo; Miao, Leixin; Min, Lujin; Zhu, Yanglin; Wang, Yu; Alem, Nasim; Liu, Chao-Xing; Mao, Zhiqiang; yan, binghai | We propose a material recipe to generate the giant anomalous Hall effect by gaping nodal rings without requiring the existence of Weyl points. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1110 | Magnetotransport properties and fermiology in a layered rare-earth intermetallics | Kurumaji, Takashi; Kang, Min Gu; Fang, Shiang; Graf, David; Ye, Linda; Zhao, Yang; Chan, Mun; Suzuki, Takehito; Comin, Riccardo; Lynn, Jeffrey; Checkelsky, Joseph | We will describe transport, spectroscopic, and neutron scattering measurements as well as ab-initio calculations to develop an understanding of their underlying electronic/magnetic structure. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1111 | Layered Rare-Earth Intergrowth Compounds: A Platform for Correlated and Topological Properties | Chan, Julia; Weiland, Ashley; McCandless, Gregory | In this talk, examples of the strategic selection of rare earth layered intergrowth compounds will be presented. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1112 | Synthesis and characterization of a new topological semimetal enabled by a charge density wave | Lei, Shiming; Lin, Jingjing; Topp, Andreas; Ast, Christian; Ong, N. Phuan; Schoop, Leslie | In this work, we discuss the potential of a CDW being the key to realize materials with clean topological semimetal band structures, by gapping out unwanted trivial states at the Fermi level. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1113 | Quantum Anomalous Hall Effect in Intrinsic Magnetic Topological Insulator MnBi2Te4 | Deng, Yujun; Yu, Yijun; Shi, Meng Zhu; Guo, Zhongxun; Xu, Zihan; Wang, Jing; Chen, Xianhui; Zhang, Yuanbo | Quantum Anomalous Hall Effect in Intrinsic Magnetic Topological Insulator MnBi2Te4 | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1114 | Routes to quantum anomalous Hall effect from superlattice-like magnetic topological insulators | Liu, Qihang; Sun, Hongyi; Liu, Pengfei; Ni, Ni; Hu, Chaowei; Gordon, Kyle; Dessau, Daniel | By realizing a bulk MnBi 4Te 7 with alternating [MnBi 2Te 4] and [Bi 2Te 3] layers, we suggest that MnBi 4Te 7 is a Z 2 antiferromagnetic topological insulator with a small out-of-plane saturation field of ~ 0.2 Tesla [1]. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1115 | A new method for tuning topological insulators with large carrier densities (~1020/cc) to CNP and beyond | Deng, Haiming; Zhao, Lukas; Park, Kyungwha; Krusin-Elbaum, Lia | We report a new powerful method for tuning chemical potential in topological materials, capable of changing carrier densities by more than 10 20/cc. | Session 75: Magnetic Weyl Semimetals: Materials Discovery |
| 1116 | Fully tunable Magic Angle Twisted Bilayer Graphene Josephson Junction | Rodan-Legrain, Daniel; Cao, Yuan; Park, Jeong Min; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | In this work, we exploit such tunability to create a fully tunable 2D Josephson Junction allowing to independently control the electronic state of the weak link and the rest of the junction via multiple electrostatic gates. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1117 | Chiral twist on the high-Tc phase diagram in moiré heterostructures | Lin, Yu-Ping; Nandkishore, Rahul | We show that the large orbital degeneracy inherent in moiré heterostructures naturally gives rise to a ‘high-T c’ like phase diagram with a chiral twist – wherein an exotic quantum anomalous Hall insulator is flanked by chiral d+id superconducting domes. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1118 | Pairing in twisted double-bilayer graphene and related moiré superlattice systems | Samajdar, Rhine; Scheurer, Mathias | We present a systematic classification and analysis of possible pairing instabilities in graphene-based moiré superlattices. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1119 | Twist angle homogeneity in twisted bilayer graphene devices studied with STM | Benschop, Tjerk; Stalman, Vincent; Wijgman, Rosanne; Leeuwenhoek, Maarten; Stepanov, Petr; Lu, Xiaobo; Efetov, Dmitri; Allan, Milan | In this talk, I present quantitative results of the homogeneity on different length scales. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1120 | Tunable electron interactions in moiré graphene: extinction of Mott order in the presence of screening | Fahimniya, Ali; Efetov, Dmitri; Stepanov, Petr; Levitov, Leonid | To that end, we explore the robustness of the Mott order in the presence of a screened e-e interaction, as is the case in currently studied heterostructures comprised of TBG, hexagonal boron nitride (hBN), and graphite layers. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1121 | Tunable bandwidths and gaps in twisted double bilayer graphene system on the verge of correlations | Adak, Pratap; Sinha, Subhajit; Ghorai, Unmesh; Sangani, L. D. Varma; Watanabe, Kenji; Taniguchi, Takashi; Sensarma, Rajdeep; Deshmukh, Mandar | Specifically, we will discuss how the bandwidth of the bands can be tuned electrically and how an electron-hole asymmetric model can explain some observations. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1122 | Observation of charging peaks near the flat band in magic-angle twisted bilayer Graphene | Tilak, Nikhil; Lai, Xinyuan; Jiang, Yuhang; Mao, Jinhai; Xu, Mingyu; Ribeiro, Raquel; Canfield, Paul; Andrei, Eva | Here, using Low temperature STM/STS measurements, we report the observation of sharp charging peaks which appear in the LDOS as the Fermi level is tuned close to the edges of the flat band. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1123 | Experimental Observation of Tunable Chern insulator and Ferromagnetism in ABC-Trilayer Graphene on hBN Moiré Superlattice | Chen, Guorui; Sharpe, Aaron; Fox, Eli; Zhang, Yahui; Wang, Shaoxin; Jiang, Lili; Lv, Bosai; Li, Hongyuan; Watanabe, Kenji; Taniguchi, Takashi; Shi, Zhiwen; Todadri, Senthil; Goldhaber-Gordon, David; Zhang, Yuanbo; Wang, Feng | We show that reversing the direction of the applied vertical electric field switches TLG/hBN’s moiré minibands between zero and finite Chern numbers, as revealed by dramatic changes in magneto-transport behavior. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1124 | Spin-triplet superconductivity and ferromagnetism in moire systems: A case study for twisted double bilayer graphene | Hsu, Yi-Ting; Wu, Fengcheng | We show that ferromagnetism and spin-triplet pairing can naturally be the dominant instabilities in such systems as a general consequence of the valley-dependent van Hove physics when the nesting is weak. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1125 | Ferromagnetism in twisted bilayer graphene | Sharpe, Aaron; Fox, Eli; Barnard, Arthur; Finney, Joe; Watanabe, Kenji; Taniguchi, Takashi; Kastner, Marc; Goldhaber-Gordon, David | Here we present evidence that near three-quarters (3/4) filling of the conduction miniband these enhanced interactions drive the twisted bilayer graphene into a ferromagnetic state. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1126 | Ferromagnetism in narrow bands of moiré superlattices | Repellin, Cecile; Zhihuan, Dong; Zhang, Yahui; Todadri, Senthil | In the limit of a perfectly flat band, we present analytical arguments in favor of the ferromagnetic state substantiated by numerical calculations. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1127 | Transport experiments in twisted (double) bilayer graphene | Rickhaus, Peter; De Vries, Folkert; Portoles, Elias; Zheng, Giulia; Liu, Ming-Hao; Lado, Jose; Wallbank, John; Slizovskiy, Sergey; Kurpas, Marcin; Pisoni, Riccardo; Overweg, Hiske; Lee, Yongjin; Kurzmann, Annika; Eich, Marius; Tong, Chuyao; Garreis, Rebekka; Gold, Carolin; Masseroni, Michele; Richter, Klaus; Watanabe, Kenji; Taniguchi, Takashi; Ihn, Thomas; Ensslin, Klaus | We study signatures in electronic transport in twisted (double) bilayer graphene. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1128 | Colossal mid-infrared photoresponse in small-twist-angle bilayer graphene | Deng, Bingchen; Ma, Chao; Wang, Qiyue; Yuan, Shaofan; Watanabe, Kenji; Taniguchi, Takashi; Zhang, Fan; Xia, Fengnian | Here we demonstrate the colossal and gate-tunable mid-infrared (5 ~ 12 μm) photoresponse leveraging the enhanced DOS and the emergence of superlattice-induced bandgaps. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1129 | Nano-photocurrent mapping of twisted bilayer graphene | Sunku, Sai; McLeod, Alexander; Stauber, Tobias; Yoo, Hyobin; Halbertal, Dorri; Ni, GuangXin; Sternbach, Aaron; Jiang, Bor-Yuan; Taniguchi, Takashi; Watanabe, Kenji; Kim, Philip; Fogler, Michael; Basov, Dmitri | We report a combined nano-photocurrent and infrared nanoscopy study of twisted bilayer graphene. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1130 | Nano-optical study of Moire superlattice domains in twisted graphene heterostructures | Halbertal, Dorri; Finney, Nathan; Sunku, Sai; Chen, Shaowen; Zhang, Charles; Curreli, Nicola; Yankowitz, Matthew; McLeod, Alexander; Ni, GuangXin; Kerelsky, Alexander; Verdu, Carmen; McGilly, Leo; Narayan, Abhay; Dean, Cory; Hone, James; Basov, Dmitri | In this work we used several nano-optical techniques to study the formation and reconstruction of domain walls in several twisted graphene heterostructures. | Session 76: Graphene: Electronic Structure and Interactions: Moire patterns |
| 1131 | Effect of ordered oxygen vacancies on the electronic and magnetic structure of perovskite-derived LaNiO3-δ nickelate | Shin, Yongjin; Rondinelli, James | We find oxygen vacancies form along the (110) pc direction and transform NiO 6 octahedra to NiO 4 square planar units. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1132 | Length Scales and Symmetries in The Physics of Correlated Perovskite Oxides | Georgescu, Alexandru Bogdan; Dominguez Ordonez, Claribel; Fowlie, Jennifer; Mundet, Bernat; Zhang, Yajun; Mercy, Alain; Catalano, Sara; Alexander, Duncan; Ghosez, Philippe; Georges, Antoine; Millis, Andrew; Gibert, Marta; Triscone, Jean-Marc | This talk will describe how to design an oxide heterostructure composed of two different nickelates in order to provide insight into the length and energy scales involved in the metal insulator transition, as well as the resulting roles of the different structural motifs [1]. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1133 | Effect of interfaces on band hybridization, orbital polarization, and helical magnetism in SrFeO3/CaFeO3 heterostructures | May, Steven | In this talk, I will present how the Fe-O band hybridization and Fe 3 d orbital occupancy changes across interfaces in isoelectronic SrFeO 3/CaFeO 3 superlattices. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1134 | Charge transfer in iridate-nickelate superlattices | Kotiuga, Michele; Kim, Heung-Sik; Vanderbilt, David; Rabe, Karin | Here, we show that in superlattices consisting of strontium iridate and lanthanum nickelate, up to one electron can transfer from iridium to nickel at the interfaces, leading to Ni 2( d8) and the unusual oxidation state Ir 5+( d4). | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1135 | Origin of orbital polarization in transition metal oxides: the case of Co2+ | Lee, Alex; Ismail-Beigi, Sohrab | Here we systematically study the origin of the strong orbital polarization of Co 2+ by considering the various structural phases of (LCO) 1+(LTO) 1 superlattice and La 2CoTiO 6. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1136 | Ferromagnetism in ultrathin double perovskite La2NiMnO6 thin films | De Luca, Gabriele; Spring, Jonathan; Bashir, Umar; Zakharova, Anna; Dominguez Ordonez, Claribel; Rossell, Marta; Piamonteze, Cinthia; Gibert, Marta | We grew LNMO films by RF off-axis magnetron sputtering and employed AFM, XRD, STEM and EDX for structural characterization. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1137 | Probing the electronic ground states of thin film Ruddlesden-Popper (Rn+1NinO3n+1) nickelates | Pan, Grace; Song, Qi; Brooks, Charles; Doyle, Spencer; Ehrets, James; Ferenc Segedin, Dan; Paik, Hanjong; Mundy, Julia | We will discuss how tuning of the Ruddlesden-Popper order alters the electronic ground states of the system including the nickel 3 d occupancy and effects on the canonical metal-to-insulator transition. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1138 | Band Offset Induced Charge Redistribution in SrNiO3/LaFeO3 Superlattices | Chambers, Scott; Wang, Le; Zhenzhong, Yang; Bowden, Mark; Freeland, John; Peter, Sushko; Yingge, Du | Band Offset Induced Charge Redistribution in SrNiO3/LaFeO3 Superlattices | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1139 | Role of interface polarity in the electronic reconstruction of infinite-layer vs. perovskite nickelate films on SrTiO3(001) | Geisler, Benjamin; Pentcheva, Rossitza | Motivated by the recent observation of superconductivity in the infinite-layer nickelate NdNiO 2 on SrTiO 3(001) by Li et al. [1], we explore the effect of interface polarity on the electronic properties of NdNiO n/SrTiO 3(001) and LaNiO n/SrTiO 3(001) thin films ( n=2,3) by performing first-principles calculations including a Coulomb repulsion term. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1140 | Spatial distribution of hole around LaNiO3/LaMnO3 interface | Anada, Masato; Sakaguchi, Satoshi; Nagai, Kazuki; Kitamura, Miho; Kumigashira, Hiroshi; Wakabayashi, Yusuke | Spatial distribution of hole around LaNiO3/LaMnO3 interface | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1141 | Disentangled transitions in artificial rare-earth nickelates | Middey, Srimanta; Meyers, Derek; Kareev, Mikhail; Cao, Yanwei; Liu, Xiaoran; Shafer, Padraic; Freeland, John; Kim, J.-W.; Ryan, P.; Chakhalian, Jak | We have devised a series of new superlattices by combining EuNiO 3 and LaNiO 3 to form ultrashort period superlattices, which allow one to disentangle the simultaneous orderings. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1142 | Structural Distortions and the Metal Insulator Transition in (111) LaNiO3 Ultrathin Films | Kane, Margaret; Riddiford, Lauren; Vailionis, Arturas; Mehta, Apurva; N’Diaye, Alpha; Arenholz, Elke; Suzuki, Yuri | We observe a similar MIT in (111)-oriented LNO on LaAlO 3 in transport measurements, but at a greater critical thickness than in (001) LNO on LAO. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1143 | Bayesian inference of perovskite oxide interface structure based on surface x-ray diffraction data | Nagai, Kazuki; Anada, Masato; Nakanishi-Ohno, Yoshinori; Okada, Masato; Wakabayashi, Yusuke | We developed a robust structure refinement method for experimentally obtained CTR scattering data by using Bayesian inference with an exchange Monte-Carlo method. | Session 77: Nickelate, Ferrite, and Cobaltate-Based Heterostructures: Metal-Insulator Transition, Magnetism, and Orbital Ordering |
| 1144 | Topological Insulator/Magnetic Insulating Oxide: A Platform for Efficient Spin Current Transport | Li, Peng; Zhang, Steven; Riddiford, Lauren; Pillsbury, Timothy; Ding, Jinjun; Kally, James; Grutter, Alexander; Rimal, Gaurab; Bi, Chong; Csaba, Gyorgy; Jiang, J; Ding, Junjia; Zhang, Wei; Tang, Jinke; Wang, Weigang; Heinonen, Olle; Novosad, Valentyn; Hoffmann, Axel; Samarth, Nitin; Suzuki, Yuri; Wu, Mingzhong | Here we discuss experiments that identified bona fide surface state-induced spin-orbit torques in topological insulator/magnetic oxide bilayers. | Session 78: Spin Phenomena in Topological Insulators |
| 1145 | Nonlinear Hall effect in topological insulator-ferromagnet heterostructures | Wang, Yang; Wang, Yong; Wang, Tao; Ou, Yu-Sheng; Ji, Yi; Doty, Matthew; Nikolic, Branislav; Law, Stephanie; Xiao, John | Here, we report current-nonlinear Hall effect in Bi 2Se 3/CoFeB heterostructures measured by second harmonic Hall voltage method, which is commonly used to extract SOTs in TI/FM bilayers. | Session 78: Spin Phenomena in Topological Insulators |
| 1146 | Nonlinear planar Hall effect | He, Pan; Zhang, Shulei; Zhu, Dapeng; Shi, Shuyuan; Heinonen, Olle; Vignale, Giovanni; Yang, Hyunsoo | We report the discovery of a new type of Hall effect in a TI Bi 2Se 3 film [1]. | Session 78: Spin Phenomena in Topological Insulators |
| 1147 | Nonlinear Hall signatures of ferroelectric switching in atomically thin WTe2 | Zhou, Benjamin T.; Zhang, Cheng-Ping; Gao, Xuejian; Kang, Kaifei; Mak, Kin Fai; Law, Kam Tuen | In this work, we demonstrate that the direction and magnitude of nonlinear Hall currents can be highly sensitive to the ferroelectric polarization in WTe 2. | Session 78: Spin Phenomena in Topological Insulators |
| 1148 | Magnetization control of ferromagnetic materials based on topological insulator Sb2Te3 sputtered thin films | Ferreira Teixeira, Sofia; Vanstone, Alexander; Pires, Ana L.; Branford, Will; Araújo, João; Cohen, Lesley; Pereira, André | In this paper, the structural and electrical properties of a uniform nanocrystalline Sb 2Te 3 thin film fabricated by ion beam sputtering will be reported. | Session 78: Spin Phenomena in Topological Insulators |
| 1149 | Persistence of spin memory in the insulating state of the crystalline phase-change material SnSb2Te4 revealed by magnetotransport measurements | Breznay, Nicholas; Reindl, Johannes; Volker, Hanno; Wuttig, Matthias | We find an unexpected spin sensitive hopping conductivity in the phase change material SnSb 2Te 4 that can be tuned with disorder. | Session 78: Spin Phenomena in Topological Insulators |
| 1150 | Observation of magnetoresistance effects in a heterostructure of Bi2Se3 and a ferromanget with perpendicular magnetic anisotropy | Oh, Junseok; Humbert, Vincent; Sklenar, Joseph; Basa, Bora; Gilbert, Matthew; Mason, Nadya | We report magnetoresistance (MR) signals in a heterostructure of 3D TI Bi 2Se 3 and Co/Pt multilayer with perpendicular magnetic anisotropy. | Session 78: Spin Phenomena in Topological Insulators |
| 1151 | Bi-linear magnetoresistance in surface states of topological insulator: the role of Rashba-Edelstein effect and relaxation processes | Dyrdal, Anna; Barnas, Jozef; Fert, Albert | We will present our recent study on BMR of surface electronic states in TIs and in 2D Rashba gas [2]. | Session 78: Spin Phenomena in Topological Insulators |
| 1152 | Nonreciprocal second harmonic generation in CuB2O4 | Toyoda, Shingo; Fiebig, Manfred; Arima, Taka-hisa; Tokura, Yoshinori; Ogawa, Naoki | In this study, we have investigated nonreciprocity of second harmonic generation. | Session 78: Spin Phenomena in Topological Insulators |
| 1153 | Magnetic torque of holmium antimonide topological semimetal | Poudel, Narayan; Hosen, M. Mofazzel; Kaczorowski, Dariusz; Neupane, Madhab; Gofryk, Krzysztof | In order to account for this issue, we have initiated detailed studies of magnetic torque of HoSb along the three crystallographic directions, and in the antiferromagnetic and paramagnetic phases. | Session 78: Spin Phenomena in Topological Insulators |
| 1154 | Large Spin-to-Charge Conversion Induced by Hybrid Rashba- and Surface-State in Topological Insulator Heterostructures | Sun, Rui; Yang, Shijia; Xu, Yang; Vetter, Eric; Sun, Dali; na, li; Su, Lei; Li, Yan; Li, Yang; Gong, Zizhao; Xie, Zongkai; Gul, Qeemat; He, Wei; Zhang, Xiangqun; Cheng, Zhaohua | We found that λ IEE alters as a function of bismuth interlayer thickness, suggesting a new degree of freedom to manipulate λ IEE by engineering the interplay of Rashba and Dirac surface states. | Session 78: Spin Phenomena in Topological Insulators |
| 1155 | Collective Spin and Charge Behavior in Ni1+-Rich Layered Nickelates | Mitchell, John | We present an expanded phase diagram of the reduced, layered nickelates and suggest ways in which these materials might be made into superconductors. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1156 | An ab initio study of electron-hole pairs in the insulating single layer cuprates and nickelates | Lane, Christopher; Zhu, Jian-Xin | We perform a comparison study of the electronic and magnetic structure of a prototypical high-temperature superconductor La 2CuO 4 with the isostructural single-layer nickelate La 2NiO 4. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1157 | Low Temperature Specific Heat of Doped SrTiO3: Doping Dependence of the Effective Mass and Kadowaki-Woods Scaling Violation | McCalla, Eric; Navarro Gastiasoro, Maria; Cassuto, Guy; Fernandes, Rafael; Leighton, Chris | We discuss wide-doping-range (8 x 10 17 to 4 x 10 20 cm -3 Hall electron density) low temperature specific heat measurements on single crystal SrTiO 3:Nb, correlated with electronic transport data and tight-binding modeling [1]. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1158 | Influence of structural distortions on the magnetic order of rare-earth titanates | Najev, Ana; Pelc, Damjan; Hameed, Sajna; Joe, Joseph; Greven, Martin; Pozek, Miroslav | We have conducted NMR measurements on select rare-earth titanates. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1159 | Multipolar orders in Kondo materials | Lee, SungBin; Paramekanti, Arun | This talk will discuss our recent work, employing Landau theory and Monte Carlo simulations, showing that incorporating multispin interactions is important to understanding such ordered states. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1160 | Changes in phonon dispersion across metal-insulator transition in a Pr-containing cobaltite | Phelan, Daniel; Krogstad, Matthew; Schreiber, Nathaniel; Osborn, Raymond; Said, Ayman; Zheng, Hong; Rosenkranz, Stephan | We have measured the dispersion of acoustic phonons in a single crystal of (Pr 0.85Y 0.15) 0.7Ca 0.3CoO 3-δ in both the metallic and insulating states and have observed differences which arise at the phase transition temperature. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1161 | Phonon density of states of the infinite layer nickelate Nd0.8Sr0.2NiO2 | Rosenkranz, Stephan; Phelan, Daniel; Wang, Bixia; Zheng, Hong; Abernathy, Douglas; Mitchell, John; Osborn, Raymond | The recent report of superconductivity up to 15K in a thin film nickelate with similar crystal and electronic structures to that of the cuprates, suggests that these infinite-layer nickelates could harbor superconductivity with the same underlying pairing mechanism as the cuprates. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1162 | Study of competing order parameters and relaxation dynamics in La1/3Sr2/3FeO3 using first-principles | Nguyen, Nam; Singh, Vijay; Park, Hyowon | Using first-principles calculations, we identify two charge ordering structures can occur in this material. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1163 | Synthesis and characterization of bulk polycrystalline Nd1-xSrxNiO3 and Nd1-xSrxNiO2 | Wang, Bixia; Zheng, Hong; Rosenkranz, Stephan; Phelan, Daniel; Mitchell, John | In this work, we have synthesized bulk polycrystalline Nd 1-xSr xNiO 3 and Nd 1-xSr xNiO 2 compounds. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1164 | Quantum Materials for Energy Efficient Neuromorphic Computing: Defective La1-xSrxCoO3-d | Zhang, Shenli; Galli, Giulia | We present a first principle study of La 1-xSr xCoO 3-d , a promising candidate material to build devices for neuromorphic computers. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1165 | Protonation-induced magnetic phase transition in SrRuO3 | Luo, Weidong; Tian, Zijun; Li, Zhuolu; Shen, Shengchun; Yu, Pu | In order to understand the protonation induced structural and magnetic phase transformations in SrRuO 3, we performed first-principles calculations. | Session 79: Unconventional Order and Phase Behaviors in Complex Oxides |
| 1166 | Flying Micro-Lightsails: Optical Levitation and Propulsion of Nanostructured Ultralight Macroscopic Objects | Atwater, Harry | We explore nanophotonic design of materials, thermal management, and self-stabilizing optical manipulation, levitation and propulsion of lightweight macroscopic (i.e., mm, cm, or even meter-scale) micro-lightsails via radiation pressure. | Session 80: Nanostructures and Metamaterials |
| 1167 | Fundamental Limits on Electromagnetic Scattering in Nanostructured Materials: Upper Bounds on Extinction, Purcell Enhancement, and Absorption | Chao, Pengning; Molesky, Sean; Venkataram, Prashanth; Jin, Weiliang; Rodriguez, Alejandro | Through algebraic analysis of the scattering properties of Maxwell’s equations, we formulate new constraints on various optical scattering processes, such as extinction and absorption, and apply these to establish upper bounds on thermal emission, radiative heat transfer, and Purcell enhancement in nanostructured materials. | Session 80: Nanostructures and Metamaterials |
| 1168 | Hot-Electron Generation and Photothermal Effect in Plasmonic Nanostructures and Metamaterials | Govorov, Alexandre; Vazquez Besteiro, Lucas | Hot-Electron Generation and Photothermal Effect in Plasmonic Nanostructures and Metamaterials | Session 80: Nanostructures and Metamaterials |
| 1169 | Optical and Thermal Metamaterials for Scalable Applications | Yin, Xiaobo | In this talk, I will give an overview on our research and, more specifically, present our recent metamaterial development for emerging food, energy and water applications. | Session 80: Nanostructures and Metamaterials |
| 1170 | Self-Cleaning and Tunable Structural Color Generation by TiO2/Ti nanostructures | Shukla, Gaurav; Subramanian, Angappane | Here, we report self-cleaning structural color generation by TiO 2 nanorods and thin films on Ti sputtered glass and polyethylene terephthalate (PET) substrates deploying glancing angle deposition (GLAD) method. | Session 80: Nanostructures and Metamaterials |
| 1171 | Two-dimensional nanostructed materials for catalytic activities: a combined experimental and theoretical study | Debela, Tekalign Terfa; Kang, Hong Seok | Herein, we report unique 2D hybrid nanostructures of MoS 2 and melamine synthesized via a one-step solvothermal process. | Session 80: Nanostructures and Metamaterials |
| 1172 | Nanostructured gold thermocouple for photodetection | Abbasi, Mahdiyeh; Evans, Charlotte; Cui, Longji; Wang, Xifan; Natelson, Douglas | We will present experimental data and simulations of single metal gold nanostructures with different geometries that are plasmonically active with IR laser illumination. | Session 80: Nanostructures and Metamaterials |
| 1173 | Tunable Hybrid Metal-Nitride Metamaterial Framework towards Plasmonic Sensing | Wang, Xuejing; Jian, Jie; Amaya, Susana; Kumah, Cindy; Lu, Ping; Huang, Jijie; Stanciu, Lia; O’Carroll, Deirdre; Boltasseva, Alexandra; Zhang, Xinghang; Wang, Haiyan | The advances on hybrid metamaterial design using bottom-up fabrication technique bring multiple advantages toward sensing and large-scale nanophotonic device integration. | Session 80: Nanostructures and Metamaterials |
| 1174 | Plasmon-Based Gas Detection with Graphene Ribbons | Khaliji, Kaveh; Biswas, Sudipta; Hu, Hai; Yang, Xiaoxia; Dai, Qing; Oh, Sang-Hyun; Avouris, Phaedon; Low, Tony | We explore the main trapping mechanisms in the setup, and discuss how these allow for plasmon-based detection with enhanced sensitivity. | Session 80: Nanostructures and Metamaterials |
| 1175 | Three-dimensional printing of piezoelectric materials with designed anisotropy and their applications in underwater transducers | Cui, Huachen; Hensleigh, Ryan; Yao, Desheng; LoPinto, Dominic; Zheng, Xiaoyu | We describe design and manufacturing routes to previously inaccessible classes of piezoelectric materials that have arbitrary piezoelectric coefficient tensors. | Session 80: Nanostructures and Metamaterials |
| 1176 | 3D printable multi-directional piezoelectric sensor | Yao, Desheng; Cui, Huachen; Hensleigh, Ryan; Zheng, Xiaoyu | Herein, we present the design methodology and manufacturing route to simultaneously extracting all individual components of the stress tensor. | Session 80: Nanostructures and Metamaterials |
| 1177 | Nonlinear Optical Metasurfaces | Brener, Igal | In this talk I will cover some of these new developments in nonlinear optical metasurfaces and hybrid nonlinear metasurfaces that include semiconductor quantum wells. | Session 80: Nanostructures and Metamaterials |
| 1178 | Microwave hybrid resonance with an electromagnetic metasurface | Zhang, Xiaonan; Sheng, Ping | Here we demonstrate through full waveform simulations the realization of microwave hybrid resonance by using a simple H-fractal metallic metasurface, with unit cell’s lateral dimension much subwavelength in size. | Session 80: Nanostructures and Metamaterials |
| 1179 | Regular sloshing modes in irregular cavity using metabathymetry | Anglart, Adam; Maurel, Agnes; Petitjeans, Philippe; Pagneux, Vincent | We demonstrate experimentally and numerically that metamaterials can be used to control water wave propagation and resonance properties of a closed cavity. | Session 80: Nanostructures and Metamaterials |
| 1180 | Measurement of asymmetrical water waves wake due to an anisotropic bathymetry | EUVE, Leo-Paul; Petitjeans, Philippe; Maurel, Agnes; Pagneux, Vincent | In our case, we consider ship wakes. | Session 80: Nanostructures and Metamaterials |
| 1181 | High-index nanostructures and layered materials for light scattering control | Babicheva, Viktoriia | We show that transdimensional lattices consisting of resonant hBN antennas in the engineered periodic arrays have great potential to serve as functional elements in ultra-thin optical components and photonic devices. | Session 80: Nanostructures and Metamaterials |
| 1182 | Towards perfect absorption via block copolymer designed metasurfaces | Cummins, Cian; Flamant, Quentin; Baron, Alexandre; Hadziioannou, Georges; Fleury, Guillaume; Ponsinet, Virginie | An emerging route to realise perfect absorption is based on artificial ultrathin nanosurfaces, known as “metasurfaces”.1 We describe a versatile metasurface fabrication strategy based upon gold (Au) selective deposition in block copolymer (BCP) templates towards perfect absorption. | Session 80: Nanostructures and Metamaterials |
| 1183 | Femtosecond Polarization Pulse Shaping by Dielectric Metasurfaces | Chen, Lu; Zhu, Wenqi; Song, Junyeob; Strait, Jared; Zhang, Cheng; Zhou, Wei; Lezec, Henri; Agrawal, Amit | Femtosecond Polarization Pulse Shaping by Dielectric Metasurfaces | Session 80: Nanostructures and Metamaterials |
| 1184 | Broadband Linear-to-Circular Polarization Conversion Enabled by Birefringent Off-Resonance Reflective Metasurfaces | Li, Dongfang; Chang, Chun-Chieh; Zhao, Zhexin; Taylor, Antoinette; Fan, Shanhui; Chen, Hou-Tong | Here we propose and demonstrate the broadband linear-to-circular polarization conversion with up to 80% fractional bandwidth and near-unity power conversion efficiency based on the coupled-mode theory using reflective birefringent metasurfaces [1]. | Session 80: Nanostructures and Metamaterials |
| 1185 | Constructing broadband multifunctional wave plates with stereo-metastructures | sun, sijia; Xiong, Xiang; Gao, Yajun; Peng, Ruwen; Wang, Mu | Here we demonstrated two 3D broadband multifunctional wave plates. | Session 80: Nanostructures and Metamaterials |
| 1186 | Optical properties of plasmonic metasurface with sub-nm gaps – Refractive index variation originating from electron transports – | Takeuchi, Takashi; Noda, Masashi; Yabana, Kazuhiro | To take into account quantum mechanical effects in the analysis, we employ time-dependent density functional theory(TDDFT) treating the constituent nano-particles by a jellium model. | Session 80: Nanostructures and Metamaterials |
| 1187 | Dynamic Switching between Surface Wave and Plane Wave with MEMS-based Metasurface | Chen, Chunxu; Zhao, Xiaoguang; Kaj, Kelson; Hammock, Ian; Wu, Ke; Averitt, Richard; Zhang, Xin | We present polarization-insensitive dynamic surface wave (SW) switching at terahertz frequencies utilizing a MEMS-based metasurface. | Session 80: Nanostructures and Metamaterials |
| 1188 | Dynamically-tunable metastructures based on phase transition of vanadium dioxide | Peng, Ruwen; Shu, F. Z.; Wang, J. N.; Liu, Yongmin; Wang, Mu | In this work, w e have experimentally demonstrated several dynamically-tunable metastructured devices based on phase transition of vanadium dioxide, which include dynamic plasmonic color generators, dynamically switchable polarizers, and dynamically tunable bowtie nanoantennas . | Session 80: Nanostructures and Metamaterials |
| 1189 | Electrically created metasurfaces | Cui, Bin; Zhuang, Yuechen; Koener, Chris; Woltersdorf, Georg; Parkin, Stuart | The fabrication of optical metasurfaces still requires complex processing techniques that include additive or subtractive methods. | Session 80: Nanostructures and Metamaterials |
| 1190 | Topological structures of and for light | Kuipers, Kobus | In this lecture I will address two illustrations of topological protection in light fields. | Session 80: Nanostructures and Metamaterials |
| 1191 | Topological phases of electromagnetic waves in superlattices of negative- and positive- epsilon materials | Okamoto, Akihiro; Nakata, Yosuke; Murakami, Shuichi | To this end, we consider the electromagnetic waves in a 1D multilayer consisting positive- and negative- epsilon layers, studied in [2]. | Session 80: Nanostructures and Metamaterials |
| 1192 | Diverged photonic spin hall effect in Weyl Photonic metamaterial | wang, Wenhui A.; Gao, Wenlong; Yang, Shengyuan; Zhang, Shuang | In this work, we discover that when circularly polarized beams are reflected by a Weyl medium, a handedness dependent spin hall effect can be realized due to the topological properties of the scattering matrix arises from the Weyl node. | Session 80: Nanostructures and Metamaterials |
| 1193 | Optically tunable topological photonic structures | Litchinitser, Natalia; Shalaev, Mikhail; Walasik, Wiktor; Li, Houchen; Gao, Jiannan | We combine the properties of a planar silicon photonic crystal and the concept of topological protection to demonstrate dynamically controlled transmission in a topological photonic crystal that exhibits the valley Hall effect. | Session 80: Nanostructures and Metamaterials |
| 1194 | Non-Hermitian landau damping and bulk Fermi arc in superlattice-gate-tuned graphene plasmons | Jung, Minwoo; Sheinfux, Hanan; Liu, Fengyu; Koppens, Frank; Shvets, Gennady | We propose that periodic damping textures can be assigned by field-effect gating through a combination of two electrodes; a metagate, thin and periodically punctured, provides a superlattice photonic crystal structure to GSPs, and a backgate, placed far below the metagate, controls local carrier densities on graphene selectively on the regions above holes in the metagate. | Session 80: Nanostructures and Metamaterials |
| 1195 | SAW interdigitated transducers as topological mechanical metamaterial | McHugh, Sean | A lattice model is developed to describe the mechanical displacement of and current through each electrode of a surface acoustic wave (SAW) interdigitated tranducer (IDT). | Session 80: Nanostructures and Metamaterials |
| 1196 | A polarization-actuated plasmonic circulator | Chen, Tzu-Yu; Huang, Chenbin | We show both by simulation and experiment, a plasmonic structure functions as a nanoscopic optical circulator when the input laser beam is properly polarized. | Session 80: Nanostructures and Metamaterials |
| 1197 | Integration of single layer MoSe2 with photonic rings for electrically switchable routing of light | Shreiner, Robert; Hao, Kai; Butcher, Amy; High, Alexander | Here, we demonstrate an electro-optical switch composed of a titanium dioxide ring resonator fabricated on monolayer molybdenum diselenide. | Session 80: Nanostructures and Metamaterials |
| 1198 | Bound States in the Continuum in Elastic Metamaterials | Haq, Omer; Shabanov, Sergei | An analytic solution is obtained for BSCs containing coupled elastic waves with different dispersion relations. | Session 80: Nanostructures and Metamaterials |
| 1199 | Strong nonreciprocal transmission self-induced by nonlinear PT-symmetric metamaterials | Argyropoulos, Christos; Jin, Boyuan | We demonstrate strong self-induced nonreciprocal transmission by using a new compact nonlinear parity-time (PT) symmetric system based on epsilon-near-zero (ENZ) metamaterials photonically doped with gain and loss defects [B. Jin and C. Argyropoulos, “Nonreciprocal Transmission in Nonlinear PT-Symmetric Metamaterials Using Epsilon-near-Zero Media Doped with Defects,” Adv. Opt. | Session 80: Nanostructures and Metamaterials |
| 1200 | High-efficient harmonic generation via Plasmonic Tamm states | Xiang, Yinxiao; Du, Chenglin; Shi, Fan; Liang, Yi; Cai, Wei; Cen, Cheng | In this work, we experimentally realized plasmonic Tamm states by combining a nanoantenna with a plasmonic Tamm structure. | Session 80: Nanostructures and Metamaterials |
| 1201 | Engineering quantum light emission from color-centers in atomically thin crystals with phase gradient metasurfaces. | Jha, Pankaj; Kafaie Shirmanesh, Ghazaleh; Akbari, Hamidreza; Grajower, Meir; Vest, Benjamin; Atwater, Harry | Here, we report a new approach for building chip-scale quantum hardware with color-centers in wide bandgap materials, such as hexagonal boron nitride ( hBN), interfaced with planar arrays of classical nanoantennas, also known as metasurfaces. | Session 80: Nanostructures and Metamaterials |
| 1202 | Modeling NV charge stability in nanodiamonds with DFT | Meara, Claire; Briddon, Patrick; Rayson, Mark; Goss, Jonathan | Recent work shows NV charge alternates with pH[3], suggesting acceptor levels from surface radicals play a role. | Session 80: Nanostructures and Metamaterials |
| 1203 | Epsilon-near-zero modes in transdimensional planar plasmonic nanostructures | Bondarev, Igor; Mousavi, Hamze; Shalaev, Vladimir | We use quantum electrodynamics and the confinement-induced nonlocal dielectric response model based on the Keldysh-Rytova electron interaction potential to study the epsilon-near-zero modes (ENZ) of plasmonic films in the TD regime[2]. | Session 80: Nanostructures and Metamaterials |
| 1204 | Plasmon Assisted Coherent Random Lasing | Khatri, Dipendra; Chen, Jiyang; Li, Ying; Kwizera, Elyahb Allie; Huang, Xiaohua; Argyropoulos, Christos; Hoang, Thang | Here, we demonstrate that plasmonic gold nanostars, through their small tips, are efficient light scattering centers which assist very narrow bandwidth and highly amplified coherent random lasing at a low lasing threshold. | Session 80: Nanostructures and Metamaterials |
| 1205 | Photoluminescence quantum efficiency of nanowire quantum dots on silicon substrates | Cui, Jiarong; Wang, Yifei; Vinh, Ho; Nguyen, Vinh | In this research our GaAsP nanowires contain GaAs quantum dot in the middle of the nanowires. | Session 80: Nanostructures and Metamaterials |
| 1206 | Environmentally friendly core-shell quantum dots for light-emitting devices: A computational study | Rusishvili, Mariami; Wippermann, Stefan; Talapin, Dmitri; Galli, Giulia | We used DFT with semi-local and hybrid functionals and the QuantumEspresso package ( https://www.quantum-espresso.org/). | Session 80: Nanostructures and Metamaterials |
| 1207 | Engineering thermochromic properties with plasmonics, quantum dots, and 2D materials. | Ha, Dongheon; Strelcov, Evgheni; Blankenship, steven; Agrawal, Amit; Kolmakov, Andrei; Zhitenev, Nikolai | We experimentally evaluate possible enhancements of sensitive thermochromic materials based on vanadium oxide (VO x) by nanophotonic engineering. | Session 80: Nanostructures and Metamaterials |
| 1208 | Surface functionalization of nanoparticles for fabrication of size-tunable and electrochemically actuable nanostructured shell assembly | Bartolo, Mark; Brisbin, Ryan; Baxter, Ryan; Ghosh, Sayantani | In this study we present a systematic characterization of the QD surface chemistry to observe and understand correlations between QD diameter, ligand size and shell size. | Session 80: Nanostructures and Metamaterials |
| 1209 | Transition to strong coupling regime for quantum emitters near a plasmonic nanostructures | Shahbazyan, Tigran | We present a model for exciton-plasmon coupling based on energy exchange mechanism between quantum emitters (QE) and localized surface plasmons in metal-dielectric structures. | Session 80: Nanostructures and Metamaterials |
| 1210 | Tip-controlled Strong Coupling with Infrared Polaritonic Heterostructures | Johnson, Samuel; Nookala, Nishant; Belkin, Mikhail; Raschke, Markus | Here, we use infrared scattering scanning near-field optical microscopy to image single antenna quantum well heterostructures, and to actively tune quantum-well saturation, coupling strength, and quantum path interference through manipulation of the nanocavity mode volume through tip-sample distance control. | Session 80: Nanostructures and Metamaterials |
| 1211 | Active Tuning of Phonons and Surface-Phonon Polariton Resonances | Dunkelberger, Adam; Ellis, Chase; Ratchford, Daniel; Giles, Alexander; Katzer, D. Scott; Grafton, Andrea; Breslin, Vanessa; Ryland, Elizabeth; Kim, Mijin; Kim, Chul Soo; Vurgaftman, Igor; Tischler, Joseph; Owrutsky, Jeffrey; Caldwell, Joshua | We have previously shown that photoinjected carriers transiently and reversibly modify the infrared reflectivity of bulk SiC. | Session 80: Nanostructures and Metamaterials |
| 1212 | Excitation of non-radiating anapoles in dielectric nanospheres | Manna, Uttam; Parker, John; Sugimoto, Hiroshi; Coe, Brighton; Eggena, Daniel; Fujii, Minoru; Scherer, Norbert; Gray, Stephen | Our approach provides a simple, straightforward alternative path to realize electrodynamic anapole mode at the optical frequencies. | Session 80: Nanostructures and Metamaterials |
| 1213 | Tailoring the chiro-optical response of Si-Ag/Au chiral heterostructure thin films fabricated by glancing angle deposition technique | KILIC, UFUK; Hilfiker, Mathew; Feder, Rene; Korlacki, Rafal; Schubert, Eva; Argyropoulos, Christos; Schubert, Mathias | Chiro-optical response of subwavelength scale nanostructures have been the subject of many research projects such as bio-sensors, topological insulators, and photonic integrated circuit designs. | Session 80: Nanostructures and Metamaterials |
| 1214 | STM Characterization of hBN-Decoupled Covalent Organic Frameworks | Rizzo, Daniel; Dai, Qingqing; Bronner, Christopher; Veber, Gregory; Smith, Brian; Matsumoto, Michio; Thomas, Simil; Nguyen, Giang; Forrester, Patrick; Zhao, William; Jorgensen, Jakob; Dichtel, William; Fischer, Felix; Li, Hong; Bredas, Jean-Luc; Crommie, Michael | In order to accomplish this, we have introduced an atomic insulating film of hBN between a COF and an underlying metallic substrate to act as a decoupling layer. | Session 80: Nanostructures and Metamaterials |
| 1215 | Strain Effect on Silicene Quantum Dot Embedded in Silicane | Wu, Bi-Ru | In this paper, the strain effect for the embedded SiQD in silicane was investigated by a first-principles method. | Session 80: Nanostructures and Metamaterials |
| 1216 | Soft porous polymer materials, a new range of acoustic metasurfaces | KAMPIOTI, KATERINA; Leng, Jacques | Here, we present a bottom-up approach which is based on soft-porous material: the dependence of the refractive index of soft porous polymer materials with their porosity enable us to fabricate acoustic gradient-index (GRIN) metasurfaces 1. | Session 80: Nanostructures and Metamaterials |
| 1217 | Self-Assembly of Poly(ethylene glycol)-Functionalized Gold Nanorods at the Vapor/Liquid Interface | Kim, Hyeong Jin; Wang, Wenjie; Bu, Wei; Mallapragada, Surya; Vaknin, David | Using surface sensitive synchrotron X-ray diffraction, we report on the self-assembly of gold nanorods (AuNRs) into 2D films at the vapor/liquid interface. | Session 80: Nanostructures and Metamaterials |
| 1218 | Temperature-induced self-assembly and crystallization of gold nanorods | Vaknin, David; Kim, Hyeong Jin; Wang, Wenjie; Travesset, Alex; Mallapragada, Surya | We report on temperature-induced and improved assembly and crystallization of gold nanorods (AuNRs) that are grafted with polye(ethylene glycol) (PEG) in electrolytic suspensions. | Session 80: Nanostructures and Metamaterials |
| 1219 | Laser-written nanograting deep inside silicon | Ishraq, Aqiq; Sabet, Rana; Tokel, Onur | We recently demonstrated a laser-writing method that enables direct creation of buried or “ in-chip” optical elements inside the wafer [1]. | Session 80: Nanostructures and Metamaterials |
| 1220 | Large Area Superhydrophilic Silicon Surface Texturing using Nanosecond Laser Pulses | Verma, Nancy; Anoop, K. K.; Dominic, Priya; Philip, Reji | We report experimental investigations of large area laser micro/nano texturing of silicon (100) targets by Nd: YAG laser pulses (λ=532 nm, τ =7 ns) addressing the wetting behavior of processed silicon surface. | Session 80: Nanostructures and Metamaterials |
| 1221 | Growth Kinetics of Metal Nanowires and Nanoplates | Fichthorn, Kristen; Chen, Zihao; Kim, Junseok | We use ab initio thermodynamics based on quantum density-functional theory (DFT) to demonstrate how these halides create thermodynamic driving forces for cubes, plates and wires, by selectively altering surface energies. | Session 80: Nanostructures and Metamaterials |
| 1222 | Molecular dynamics simulation of silicon nanowires with oxide layers under uniaxial tension | Xu, Wenting; Kim, Woo Kyun | In this work, we employ the molecular dynamics (MD) simulation method to study the influence of oxide layers on the BDT of silicon nanowires under uniaxial tension loading. | Session 80: Nanostructures and Metamaterials |
| 1223 | Porous Silica Cluster Collision Molecular Dynamics | Switzer, Eric; Bhattacharya, Aniket | We report molecular dynamics simulation studies of the coalescence of small (approx. 2 nm) porous silica clusters with each other for a range of velocities and initial cluster porosities. | Session 80: Nanostructures and Metamaterials |
| 1224 | Granular aluminum meandered superinductors for quantum circuits | Kamenov, Plamen; Lu, Wen-Sen; Kalashnikov, Konstantin; DiNapoli, Thomas; Bell, Matthew; Gershenson, Michael | We report on the optimization, fabrication, and characterization of superinductors made of meandered nanowires of strongly disordered (granular) Aluminum [1]. | Session 80: Nanostructures and Metamaterials |
| 1225 | Characterization of Spin-Thermal Environment Interaction Leading to Nuclear Quadrupolar Spin Relaxation | Neogi, Sanghamitra; Settipalli, Manoj | Our study provides a framework to characterize the thermal noise affecting the nuclei spin qubits. | Session 80: Nanostructures and Metamaterials |
| 1226 | Spin transport in ferromagnet-InSb nanowire quantum devices | Yang, Zedong; Heischmidt, Brett; Gazibegovic, Sasa; Badawy, Ghada; Car, Diana; Crowell, Paul; Bakkers, Erik; Pribiag, Vlad | In our experiments, by fabrication ferromagnetic contacts, we investigate spin transport across InSb NWs in a quasi-1D ballistic regime 2. | Session 80: Nanostructures and Metamaterials |
| 1227 | Optical Properties of Monolayer Bismuthene under Electric Field based on First-principles Calculations | Liu, Wei Chieh; Xu, Liangliang; Lin, Ming-Chieh; Leung, Tsan-Chuen; Hsu, Hua-Yi | In this work, the energy band structure, density of states, and optical constants of bismuthene have been calculated using the first-principles calculations based on density functional theory (DFT). | Session 80: Nanostructures and Metamaterials |
| 1228 | Shadowing of epitaxial superconductors on selectively grown in-plane semiconductor wires for advanced quantum devices | Lee, Joon Sue; Pendharkar, Mihir; dempsey, connor; Choi, Sukgeun; Goswami, Aranya; Wu, Hao; Zhang, Po; Op het Veld, Roy; Bakkers, Erik; Frolov, Sergey; Palmstrom, Chris | Here we demonstrate a shadowing scheme of epitaxial superconductors on in-plane quantum wires by selective-area growth. | Session 80: Nanostructures and Metamaterials |
| 1229 | Synthetic Weyl Points and Chiral Anomaly in Majorana Devices | Kotetes, Panagiotis; Mercaldo, Maria Teresa; Cuoco, Mario | We demonstrate how to design various nonstandard types of Andreev-bound-state (ABS) dispersions, via a composite construction relying on Majorana bound states (MBSs). | Session 80: Nanostructures and Metamaterials |
| 1230 | Correlated Insulators in Twisted Double Bilayer Graphene | Burg, Gregory; Zhu, Jihang; Taniguchi, Takashi; Watanabe, Kenji; Macdonald, Allan; Tutuc, Emanuel | We present a combined experimental and theoretical study of twisted double bilayer graphene with twist angles near 1°. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1231 | Correlated states in twisted trilayer graphene | Chen, Shaowen; Hsieh, Valerie; Yankowitz, Matthew; Watanabe, Kenji; Taniguchi, Takashi; Dean, Cory | Here we show tunable band hybridization and correlated states in twisted trilayer graphene, realized by placing monolayer graphene on top of a bernal bilayer graphene. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1232 | Coexistence of ultraheavy and ultrarelativistic Dirac quasiparticles in sandwiched trilayer graphene. | Li, Chenyuan; Carr, Stephen; Zhu, Ziyan; Kaxiras, Efthimios; Sachdev, Subir; Kruchkov, Alex | Here we show that such a twisted sandwiched graphene (TSWG) – a three-layer van der Waals heterostructure with a twisted middle layer – can have very stable flat bands coexisting with Dirac cones near the Fermi energy when twisted to 1.5 degrees. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1233 | Periodically strained graphene lattice: flat bands | Milovanovic, Slavisa; Andelkovic, Misa; Covaci, Lucian; Peeters, Francois | We use a tight-binding model to calculate the band structure of periodically strained graphene lattice. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1234 | Experimental Discovery of High Dimensional Band Topology in Twisted Bilayer Graphene | Ma, Chao; Wang, Qiyue; Mills, Scott; Chen, Xiaolong; Deng, Bingchen; Yuan, Shaofan; Li, Cheng; Watanabe, Kenji; Taniguchi, Takashi; Xu, Du; Zhang, Fan; Xia, Fengnian | In this work, we performed a systematic nonlocal transport study and revealed the nontrivial high dimensional band topology in t-BLG. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1235 | Flat bands and gaps in twisted double bilayer graphene | Capaz, Rodrigo; Culchac, Francisco; Chico, Leonor; Suarez Morell, Eric | We present electronic structure calculations of twisted double bilayer graphene (TDBG): A tetralayer graphene structure composed of two AB-stacked graphene bilayers with a relative rotation angle between them. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1236 | Electric field tunable correlated insulating states and spin-polarized phase transitions in twisted bilayer-bilayer graphene | Rubies-Bigorda, Oriol; Cao, Yuan; Rodan-Legrain, Daniel; Park, Jeong Min; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | We report here on a new correlated platform, twisted bilayer-bilayer graphene (TBBG), which consists of two sheets of Bernal stacked bilayer graphene rotated by a small angle. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1237 | Lifshitz transitions in magic-angle twisted bilayer graphene | zhang, zhenyuan; Wu, Shuang; Andrei, Eva | Here we report on magneto-transport measurements of a twisted bilayer graphene device(1.17°±0.02°). | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1238 | Chern insulators at odd fillings in magic-angle twisted bilayer graphene | Wu, Shuang; zhang, zhenyuan; Andrei, Eva | We report on magneto-transport measurements of a twisted bilayer graphene device(1.17°±0.02°). | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1239 | Nematicity in twisted bilayer graphene: impact of the moiré superlattice | Fernandes, Rafael; Venderbos, J.W.F. | Here, we theoretically investigate the coupling between electronic nematic and moiré superlattice degrees of freedom. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1240 | Z2 topology and edge states of twisted bilayer graphene | Ma, Chao; Wang, Qiyue; Mills, Scott; Chen, Xiaolong; Deng, Bingchen; Yuan, Shaofan; Li, Cheng; Watanabe, Kenji; Taniguchi, Takashi; Xu, Du; Zhang, Fan; Xia, Fengnian | We demonstrate that, while an unusual symmetry of tBLG trivializes the Berry curvature, two Z2 invariants characterize the topology of the moiré Dirac bands. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1241 | Topological Floquet engineering of twisted bilayer graphene | Sentef, Michael; Topp, Gabriel; Jotzu, Gregor; McIver, James; Xian, Lede; Rubio, Angel | We investigate the topological properties of Floquet-engineered twisted bilayer graphene above the magic angle driven by circularly polarized laser pulses. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1242 | Topological charge pumping by sliding moiré pattern | Fujimoto, Manato; Koschke, Henri; Koshino, Mikito | We theoretically study the adiabatic topological charge pumping driven by interlayer sliding in the moiré superlattices. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1243 | Artificial gauge field in Moiré superlattices | Shang, Ce; Abbout, Adel; Zang, Xiaoning; Schwingenschloegl, Udo; Manchon, Aurelien | Here, we propose a method to create a tunable, artificial gauge potential in a periodically modulated Moiré superlattice. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1244 | Multiple topological phases in graphene via magnetoelectric proximity effect | Takenaka, Hiroyuki; Sandhoefner, Shane; Kovalev, Alexey; Tsymbal, Evgeny | Here we propose a new approach to control the topological electronic states of a two-dimensional material by the proximity of a magnetoelectric antiferromagnet. | Session 81: Graphene: Electronic Structure and Interactions II; moire and topology |
| 1245 | Using Superheroes to Engage the Public | Kakalios, James | Using Superheroes to Engage the Public | Session 82: Physics For Everyone |
| 1246 | Physics of Star Wars | Johnson, Patrick | This talk will offer possible explanations of these scenes and more. | Session 82: Physics For Everyone |
| 1247 | Science and Cooking: Making Physics Fun (and Tasty!) | Weitz, David | This talk will describe the experiences of physics course for non-scientists that makes physics fun. | Session 82: Physics For Everyone |
| 1248 | Bringing Science to the Public Using Popular Culture | Ramirez, Anissa | This talk will also showcase how science can be stealthily encased in a historical context in stories about inventions. | Session 82: Physics For Everyone |
| 1249 | The Physics of NASCAR: How March Meeting Physicists Have Unique Opportunities to Share Physics with the Public | Leslie-Pelecky, Diandra | I’ll also share a few things I’ve learned along the way: why there are lots of engineers, but few physicists, in NASCAR; the NASA technology in every NASCAR racecar; the move toward electric vehicles and sustainability; safety innovations that started on the track and moved to the interstate, and the cheap polymer component used on racecars that the military now uses on their helicopters. | Session 82: Physics For Everyone |
| 1250 | Spin waves in the antiferromagnetic topological insulator MnBi2Te4 | Li, Bing; Riberolles, Simon; Ke, Liqin; Gordon, Elijah; Pajerowski, Daniel; Kreyssig, Andreas; Ueland, Benjamin; Yan, Jiaqiang; McQueeney, Robert | Here we present results from our inelastic neutron scattering (INS) study on MnBi 2Te 4 single crystals, where we determined the strength of the magnetic interactions and anisotropy in the AF state (T N = 24 K). | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1251 | Electronic states and magnetic response of MnBi2Te4 surface by scanning tunneling microscopy and spectroscopy | Yuan, Yonghao; Wang, Xintong; Li, Hao; Li, Jiaheng; Ji, Yu; Hao, Zhenqi; Wu, Yang; He, Ke; Wang, Yayu; Xu, Yong; Wenhui, Duan; Li, Wei; Xue, Qikun | Electronic states and magnetic response of MnBi2Te4 surface by scanning tunneling microscopy and spectroscopy | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1252 | Gapless surface Dirac cone and its possible origin in antiferromagnetic topological insulator MnBi2Te4 | Hao, Yu-Jie; Liu, Pengfei; Feng, Yue; Ma, Xiao-Ming; Schwier, Eike; Arita, Masashi; Kumar, Shiv; Hu, Chaowei; Lu, Rui’e; Zeng, Meng; Wang, Yuan; Hao, Zhanyang; Sun, Hong-Yi; Zhang, Ke; Mei, Jiawei; Ni, Ni; Wu, Liusuo; Shimada, Kenya; Chen, Chaoyu; Liu, Qihang; Liu, Chang | Through symmetry analysis and ab initio calculations we consider different types of surface magneitc reconstruction as possible origins giving rise to such linear dispersion. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1253 | MBE Synthesis and Characterization of Intrinsic Magnetic Topological Insulator MnBi2Se4 | Zhu, Tiancong; Bishop, Alexander; Zhou, Tong; O’Hara, Dante; Zhu, Menglin; Walko, Robert; Noesges, Brenton; Cheng, Shuyu; Repicky, Jacob; Baker, Alexander; Liu, tao; Freeland, John; Brenner, Mark; Jozwiak, Chris; Rotenberg, Eli; Brillson, Leonard; Hwang, Jinwoo; Zutic, Igor; Gupta, Jay; Kawakami, Roland | We report the MBE synthesis and characterization of an intrinsic magnetic topological insulator MnBi 2Se 4. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1254 | Scanning tunneling microscopy and spectroscopy investigation of the antiferromagnetic topological insulator MnBi2Te4 | Li, Hong; Zhao, He; Hu, Chaowei; Mackey, Scott; Wang, Ziqiang; Ni, Ni; Zeljkovic, Ilija | Using low temperature scanning tunneling microscopy and spectroscopy, we study the surface of high-quality single crystals of MnBi2Te4. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1255 | Strongly Gapped Topological Surface States in MnBi2Te4(Bi2Te3)n Family | Gordon, Kyle; Hu, Chaowei; Liu, Pengfei; Ghosh, Barun; Linn, Andrew; Li, Haoxiang; Narayan, Dushyant; Liu, Jinyu; Sun, Hongyi; Singh, Bahadur; Agarwal, Amit; Xu, Suyang; Lin, Hsin; Chang, Tay-Rong; Liu, Qihang; Ni, Ni; Dessau, Daniel | In this talk, we present Angular Resolved Photoemission Spectroscopy (ARPES) experiments on MnBi 4Te 7, MnBi 6Te 10, and MnBi 8Te 13, demonstrating the topological nature of each material. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1256 | Competing Interactions in the Antiferromagnetic State of the Axion Insulator Candidate MnBi2Te4 | Morano, Vincent; Stewart, Veronica; Qiu, Yiming; Brown, Craig; McQueen, Tyrel; Broholm, Collin | Modelling these data using spin-wave theory, we obtain an effective spin Hamiltonian for MnBi 2Te 4 that features competing ferro- and antiferromagnetic interactions within the basal plane. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1257 | Investigation on the topological surface states of a superlattice-like magnetic topological insulator MnBi4Te7 | wu, xuefeng; Zhang, Yu; Ma, Xiao-Ming; Zhou, Chunsheng; wang, kedong; Liu, Qihang; Liu, Chang; Zhao, Yue | Here, we investigate the surface states of MnBi 4Te 7 crystal via angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM) techniques. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1258 | Dynamic magnetic properties of a magnetic topological insulator material MnBi4Te7 | Mehlawat, Kavita; Alfonsov, Alexey; Isaeva, Anna; Buechner, Bernd; Kataev, Vladislav | We performed electron spin resonance (ESR) spectroscopy measurements in wide frequency and temperature ranges to explore the dynamic magnetic properties of MnBi 4Te 7. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1259 | Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulators | Yang, Lexian; Liu, Zhongkai; Xu, Yong; Chen, Yulin | Here, we carried out comprehensive and high-resolution angle-resolved photoemission spectroscopy studies on MnBi 2Te 4, and identified its topological electronic structure. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1260 | Characterization of the Layered Antiferromagnetic Topological Insulator MnBi2Se4 Using Scanning Tunneling Microscopy | Walko, Robert; Zhu, Tiancong; Bishop, Alexander; Kawakami, Roland; Gupta, Jay | In our STM images, we observed a triangular lattice with an average lattice constant of 3.85Å. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1261 | Engineering MnBi2Te4 thin films by chemical dopants and tailoring structure | Zhang, Liguo; Lin, Haicheng; Fan, Fengren; Sun, Yan; Felser, Claudia | In this work we systematically studied the magneto-electrical transport properties with the bottom gate tuning method. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1262 | Surface magnetism of antiferromagnetic topological insulator MnBi2Te4 | Wu, Weida; Sass, Paul; Yan, Jiaqiang | In this talk, we will present MFM studies of MnBi2Te4 single crystals to address the nature of surface magnetism. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1263 | Quantum transport in a dual-gated antiferromagnetic topological insulator | Yasuda, Kenji; Soriano, Eric; Wang, Xirui; Yan, Jiaqiang; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | We here report the quantum transport properties of dual-gated antiferromagnetic topological insulator devices, which allow the independent control of the carrier density and the electric field. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1264 | Realizing intrinsic magnetic topological insulators with gapped topological surface states in MnBi2-xSbxTe4 | Ko, Wonhee; Kolmer, Marek; Yan, Jiaqiang; Pham, Anh; Fu, Mingming; Luepke, Felix; Okamoto, Satoshi; Ganesh, Panchapakesan; Gai, Zheng; Li, An-Ping | Here we show that by doping MnBi2Te4 with Sb, the Fermi level can be shifted while the non-trivial topology is maintained. | Session 83: MnBi2Te4: Spectroscopic Properties |
| 1265 | THz spectroscopy of topological magnon candidate CoTiO3 | Jasper, Evan; DeLazzer, Timothy; Ross, Kate; Valdes Aguilar, Rolando | We propose that the modes broaden with decreasing temperature or a new absorption appears below the Néel temperature with energy coinciding with a zone-center magnon excitation. | Session 84: Skyrmions and Topological Magnonics |
| 1266 | Three-dimensional topological magnon systems | Kondo, Hiroki; Akagi, Yutaka; Katsura, Hosho | In our previous work, we defined a Z 2 topological invariant for them and proposed the first model of a magnonic analog of a spin Hall insulator without spin conservation [2]. | Session 84: Skyrmions and Topological Magnonics |
| 1267 | Chiral Magnonic Edge States in Ferromagnetic Skyrmion Crystals Controlled by Magnetic Fields | Diaz, Sebastian; Hirosawa, Tomoki; Klinovaja, Jelena; Loss, Daniel | We show that an external magnetic field can drive a topological phase transition in the spin wave spectrum of a ferromagnetic skyrmion crystal. | Session 84: Skyrmions and Topological Magnonics |
| 1268 | Magnetic field control of topological magnon-polaron bands in two-dimensional ferromagnets | Shen, Pengtao; Kim, Se Kwon | We theoretically study magnon-phonon hybrid excitations in a square lattice ferromagnet subjected to a magnetic field by varying the field direction. | Session 84: Skyrmions and Topological Magnonics |
| 1269 | Magnonic Su-Schriffer-Heeger Model in Honeycomb Ferromagnets | Li, Yuhang; Cheng, Ran | We study a collinear honeycomb ferromagnet with variable nearest-neighbor exchange interactions in the presence of the next nearest-neighbor Dzyaloshinskii-Moriya interaction. | Session 84: Skyrmions and Topological Magnonics |
| 1270 | Nonsymmorphic-symmetry-protected topological magnons in three-dimensional Kitaev materials | Kim, Yong-Baek; Choi, Wonjune; Mizoguchi, Tomonari | We show that field-induced canted zig-zag order of three-dimensional hyperhoneycomb Kitaev materials has gapless topological magnons protected by nonsymmorphic magnetic space group symmetries. | Session 84: Skyrmions and Topological Magnonics |
| 1271 | Quantum field theory of topological spin dynamics | Nikolic, Predrag | I will present a unifying quantum field theory of a wide range of such materials, which captures their universal and topological dynamics. | Session 84: Skyrmions and Topological Magnonics |
| 1272 | Polarization-resolved Raman spectroscopy of α-RuCl3 and evidence of room-temperature two-dimensional magnetic scattering | Hight Walker, Angela; Mai, Thuc; McCreary, Amber; Lampen-Kelley, Paula; Butch, Nicholas; Simpson, Jeffrey; Yan, Jiaqiang; Nagler, Stephen; Mandrus, David; Valdes Aguilar, Rolando | We argue that this scattering continuum originates from the Kitaev magnetic interactions that survives up to room temperature, a scale larger than the bare Kitaev exchange energy of approximately 50 K. 1DOI: 10.1103/PhysRevB.100.134419 | Session 84: Skyrmions and Topological Magnonics |
| 1273 | Dimension transcendence and anomalous charge transport in magnets with moving multiple-Q spin textures | Su, Ying; Hayami, Satoru; Lin, Shizeng | Here we show that to describe correctly the electronic dynamics, the momentum space needs to be transcended to higher dimensions by including the ancillary dimensions associated with phason modes of the translational motion of the spin textures. | Session 84: Skyrmions and Topological Magnonics |
| 1274 | Thermal-transport properties of chiral antiferromagnet CsCuCl3 | Akazawa, Masatoshi; Shimozawa, Masaaki; Yamashita, Minoru; Kousaka, Yusuke; Akimitsu, Jun; Tsuchiya, Naoto; Inoue, Katsuya; Zaccaro, Julien; Gautier-Luneau, Isabelle; Luneau, Dominique | We find a large enhancement of the longitudinal thermal conductivity in the ordered phase. | Session 84: Skyrmions and Topological Magnonics |
| 1275 | Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part II: Temperature Dependence and Current Switching | Serlin, Marec; Tschirhart, Charles; Polshyn, Hryhoriy; Zhang, Yuxuan; Zhu, Jiacheng; Huber, Martin; Balents, Leon; Watanabe, Kenji; Taniguchi, Takashi; Young, Andrea | In particular, we find that the measured electronic energy gap of ~30K is several times higher than the Curie temperature, consistent with a lack of disorder associated with magnetic dopants. | Session 84: Skyrmions and Topological Magnonics |
| 1276 | Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part I: Device Fabrication and Transport | Zhang, Yuxuan; Serlin, Marec; Tschirhart, Charles; Polshyn, Hryhoriy; Zhu, Jiacheng; Balents, Leon; Huber, Martin; Taniguchi, Takashi; Watanabe, Kenji; Young, Andrea | I will introduce the phenomenology of twisted bilayer graphene and present evidence for hBN alignment as manifested in the hierarchy of symmetry-breaking gaps and anomalous magnetoresistance. | Session 84: Skyrmions and Topological Magnonics |
| 1277 | Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part III: Scanning Probe Magnetometry | Tschirhart, Charles; Serlin, Marec; Polshyn, Hryhoriy; Zhang, Yuxuan; Zhu, Jiacheng; Balents, Leon; Huber, Martin; Watanabe, Kenji; Taniguchi, Takashi; Young, Andrea | In this segment I will present scanning probe magnetometry data acquired using a nanoSQUID-on-tip microscope, which provides ~150 nm spatial resolution and a field sensitivity of ~10 nT/rtHz. | Session 84: Skyrmions and Topological Magnonics |
| 1278 | The RKKY Interaction in Graphene Proximity Coupled to an Antiferromagnetic Insulator | Zhu, Jia-Ji; Yang, Jin | We study theoretically the long-range Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction mediated by itinerant electrons of graphene between magnetic moments induced by proximity effect of an antiferromagnetic insulator. | Session 84: Skyrmions and Topological Magnonics |
| 1279 | Non-Spin-Wave type of Magnetic Excitations in a Well-characterized Nearest-Neighbor Triangular Antiferromagnet | Bao, Wei | Non-Spin-Wave type of Magnetic Excitations in a Well-characterized Nearest-Neighbor Triangular Antiferromagnet | Session 84: Skyrmions and Topological Magnonics |
| 1280 | Theoretical model for direct evidence of spatial stability of Bose-Einstein condensate of magnons | Borisenko, Igor; Divinskiy, Boris; Demidov, Vladislav; Li, Gang; Nattermann, Thomas; Pokrovsky, Valery; Demokritov, Sergej | Here, we provide direct experimental evidence that magnons in a condensate exhibit repulsive interaction resulting in the condensate stabilization and propose a mechanism, which is responsible for the interaction inversion. | Session 85: Magnon and Spin Dynamics |
| 1281 | Thermal Hall Effect in Collinear Antiferromagnets on a Square Lattice | Suri, Nishchay; Zhang, Yinhan; Okamoto, Satoshi; Xiao, Di | We show that the thermal Hall effect is possible in collinear antiferromagnets on a squre lattice once the magnon-phonon interaction due to the Dzyaloshinskii-Moriya interaction (DMI) is taken into account. | Session 85: Magnon and Spin Dynamics |
| 1282 | Magnon contributions to dielectric constant in spiral magnets | Foggetti, Francesco; Artyukhin, Sergey | Here we model chiral domain walls in the spiral magnetic order and characterize the excitation spectrum using a model Hamiltonian describing spins interacting with polar ionic displacements. | Session 85: Magnon and Spin Dynamics |
| 1283 | Goos-Hänchen effect of spin waves at heterochiral interfaces | Wang, zhenyu; Cao, Yunshan; Yan, Peng | In this work, we observe a Goos-Hänchen shift of spin waves at the heterochiral interface when the spin-wave beam is totally reflected. | Session 85: Magnon and Spin Dynamics |
| 1284 | Magnon spectrum in Ferromagnet-Superconductor heterostructure | Parajuli, Bishal; Lin, Shizeng; Chien, Chih-Chun | Research on ferromagnet-superconductor heterostructures gives rise to novel quantum phases and excitations. | Session 85: Magnon and Spin Dynamics |
| 1285 | Imaging spin-wave propagation and interference with electron spins in diamond | Bertelli, Iacopo; Carmiggelt, Joris; Simon, Brecht; Pothoven, Coosje; Aarts, Jan; Van der Sar, Toeno; Yu, Tao; Bauer, Gerrit; Blanter, Yaroslav | Here we use electron spins in diamond to probe coherent spin-wave transport in the magnetic insulator yttrium-iron-garnet (YIG). | Session 85: Magnon and Spin Dynamics |
| 1286 | Experimental observation of exceptional surface in synthetic dimensions with magnon polaritons | Zhang, Xufeng; Ding, Kun; Zhou, Xianjing; Xu, Jing; Jin, Dafei | We took advantage of the excellent tunability in magnon polaritons and introduced a 4-dimensional synthetic space, which enabled the observation of ES. | Session 85: Magnon and Spin Dynamics |
| 1287 | Magnon spectrum of the chiral ferrimagnet Cu2OSeO3: a coarse-grained approach | Luo, Yi; Marcus, Guy; Trump, Benjamin; Kindervater, Jonas; Stone, Matthew; McQueen, Tyrel; Tchernyshyov, Oleg; Broholm, Collin | We report a comprehensive neutron scattering study of low energy magnetic excitations in the breathing pyrochlore helimagnetic Cu 2OSeO 3. | Session 85: Magnon and Spin Dynamics |
| 1288 | Modeling Hall viscosity in magnetic Skyrmions | Kim, Bom | Our analyses, based on available asymmetric Hall angle data, reveal this transverse force amounts 3% – 5.4% of the force due to Skyrmion Hall effect. | Session 85: Magnon and Spin Dynamics |
| 1289 | Spin dynamics in the skyrmion host lacunar spinel GaV4S8 | Pokharel, Ganesh; Suriya Arachchige, Hasitha; Ehlers, Georg; Do, Seunghwan; Stone, Matthew; Lumsden, Mark; Zhang, Hao; Batista, Cristian; Qiu, Yiming; Fishman, Randy; Mandrus, David; Christianson, Andrew | Using a Heisenberg model with near-neighbor exchange couplings and Dzyaloshinskii-Moria (DM) interactions, the excitation spectra are simulated. | Session 85: Magnon and Spin Dynamics |
| 1290 | Dynamics of a vortex near the edge of a thin-film ferromagnet | Bjerngaard, Michael; Reitz, Derek; Tchernyshyov, Oleg | We study this motion numerically and model it analytically. | Session 85: Magnon and Spin Dynamics |
| 1291 | Soliton Bound States in Large-Spin Anisotropic Antiferromagnets | Lane, Harry; Krüger, Frank; Christou, Elliot; Stock, Chris; Ewings, Russell | Using a path integral approach [1], we show that the movement of domain walls in an anisotropic large-spin antiferromagnetic chain can be described by solitons. | Session 85: Magnon and Spin Dynamics |
| 1292 | Tuning high-Q nonlinear dynamics in a disordered quantum magnet | Silevitch, Daniel; Tang, Christopher; Aeppli, Gabriel; Rosenbaum, Thomas | Here we demonstrate an exception in a disordered quantum magnet that divides itself into nearly isolated subsystems. | Session 85: Magnon and Spin Dynamics |
| 1293 | Enhanced self-focusing effect of spin-wave by a pulsed flat-top excitation field in a multi-domain state | Hyo Seok, Kim; Lee, Jongseok; Choi, In Hyeok | In this work, we explore another efficient way of the SW focusing by using the spatially and temporally tailored magnetic field excitations. | Session 85: Magnon and Spin Dynamics |
| 1294 | Ferromagnetic resonance in few-layered CrI3 single crystals using magneto-Raman spectroscopy | Valdes Aguilar, Rolando; McCreary, Amber; Mai, Thuc; Utermohlen, Franz; Simpson, Jeffrey; Garrity, Kevin; Feng, Xiaozhou; Shcherbakov, Dmitry; Zhu, Yanglin; Hu, Jin; Weber, Daniel; Watanabe, Kenji; Taniguchi, Takashi; Goldberger, Joshua; Mao, Zhiqiang; Lau, Chun Ning; Lu, Yuan-Ming; Trivedi, Nandini; Hight Walker, Angela | We study in detail the structural and magnetic excitations of CrI 3 in single crystalline thin flakes using inelastic light scattering in a magnetic field. | Session 85: Magnon and Spin Dynamics |
| 1295 | Classifying Snapshots of the Doped Hubbard Model with Machine Learning | Bohrdt, Annabelle; Chiu, Christie; Ji, Geoffrey; Xu, Muqing; Greif, Daniel; Greiner, Markus; Demler, Eugene; Grusdt, Fabian; Knap, Michael | We use machine learning techniques to analyse and classify such snapshots of ultracold atoms. | Session 86: Machine Learning for Quantum Matter |
| 1296 | AI Assisted Discovery in Quantum Gas Microscope Images | Guardado-Sanchez, Elmer; Spar, Benjamin; Carrasquilla, Juan; Scalettar, Richard; Bakr, Waseem; Khatami, Ehsan | We try this unbiased approach on images taken in the non-Fermi liquid phase of the Hubbard model around optimal doping. | Session 86: Machine Learning for Quantum Matter |
| 1297 | Unsupervised machine learning of topological phase transitions | Rodriguez Nieva, Joaquin; Scheurer, Mathias | In this talk, I will discuss an unsupervised machine-learning approach that we propose [see Nature Physics 15, 790-795 (2019)], which is capable of “learning” topological invariants from raw, unlabeled data. | Session 86: Machine Learning for Quantum Matter |
| 1298 | Classification of optical quantum states using machine learning | Ahmed, Shahnawaz; Sánchez Muñoz, Carlos; Nori, Franco; Frisk Kockum, Anton | To benchmark our method, we compare with a naive classifier using maximum likelihood estimation. | Session 86: Machine Learning for Quantum Matter |
| 1299 | Unsupervised learning of quantum phase transitions using nonlinear dimension reduction methods | Lidiak, Alexander; Gong, Zhexuan | This motivates us to investigate nonlinear dimension reduction methods such as diffusion maps and autoencoders. | Session 86: Machine Learning for Quantum Matter |
| 1300 | Machine learning the Mattis glass transformation | Lozano-Gomez, Daniel; Pereira, Darren; Gingras, Michel J | In this context, we consider classical spin models in which we introduce a so-called Mattis gauge transformation. | Session 86: Machine Learning for Quantum Matter |
| 1301 | Augmenting machine learning algorithms with the addition of a physics based intelligence prior | Singh, Christopher; Redell, Matthew; Elhamod, Mohannad; Bu, Jie; Karpatne, Anuj; Lee, Wei-Cheng | We outline this simple mechanism to decrease the number of exposures, and enhance the predictive power with a number of examples relevant to the study of quantum phase transitions. | Session 86: Machine Learning for Quantum Matter |
| 1302 | Adversarial machine learning for modeling the distribution of large-scale ultracold atom experiments | Casert, Corneel; Mills, Kyle; Vieijra, Tom; Ryckebusch, Jan; Tamblyn, Isaac | We present how artificial neural networks allow for the direct and targeted generation of large-scale microstates, while restricting the time-consuming simulations or measurements to a small number of particles. | Session 86: Machine Learning for Quantum Matter |
| 1303 | Using Convolutional Neural Networks to analyze phase transitions and calculate critical exponents | Maskara, Nishad; Van Nieuwenburg, Evert; Endres, Manuel | In this work, we present an alternative framework for analyzing phase transitions by using neural networks to learn order parameters directly from data. | Session 86: Machine Learning for Quantum Matter |
| 1304 | Unsupervised learning of topological indices | Balabanov, Oleksandr; Granath, Mats | I will present an unsupervised protocol for learning topological indices of quantum systems [1]. | Session 86: Machine Learning for Quantum Matter |
| 1305 | Machine Learning based BCS superconductivity Predictor from Normal State Properties | Han, Fei; Andrejevic, Nina; Nguyen, Thanh; Nguyen, Quynh; Parjan, Shreya; Li, Mingda | In this study, we employed a few deep learning architectures to correlate the normal state properties to superconductivity. | Session 86: Machine Learning for Quantum Matter |
| 1306 | Unlocking quantum critical phenomena with physics guided artificial intelligence | Singh, Christopher; Redell, Matthew; Elhamod, Mohannad; Bu, Jie; Lee, Wei-Cheng; Karpatne, Anuj | By analyzing the predictions for the total phase space, we can confidently identify the location of criticality from the evolution of the predicted wavefunctions. | Session 86: Machine Learning for Quantum Matter |
| 1307 | Neural-Network Approach to Dissipative Quantum Many-Body Dynamics | Hartmann, Michael; Carleo, Giuseppe | Here we present an approach to the effective simulation of the dynamics of open quantum many-body systems based on machine-learning techniques. | Session 86: Machine Learning for Quantum Matter |
| 1308 | Materials discovery through artificial intelligence | Aykol, Muratahan | In this talk, I will present new AI tools developed at TRI for end-to-end material discovery systems. | Session 86: Machine Learning for Quantum Matter |
| 1309 | Working without data: overcoming gaps in deep learning and physics-based extrapolation | Tamblyn, Isaac | Other challenges include the lack of a standardized methodology for reporting and understanding model errors as well as the frequent requirement for large quantities of data. | Session 86: Machine Learning for Quantum Matter |
| 1310 | Machine learning models of properties of hybrid 2D materials as potential super lubricants | Fronzi, Marco; Abu Ghazaleh, Mutaz; Isayev, Olexandr; Winkler, David; shapter, joe; Ford, Michael | We describe a time and resource-efficient machine learning approach to create a large dataset of structural properties of van der Waals layered structures. | Session 86: Machine Learning for Quantum Matter |
| 1311 | Charge Density Prediction through 3D-CNN for Fast Convergence of Self-Consistent DFT calculation | Kurata, Iori; Shinagawa, Chikashi; Sawada, Ryohto | In this study, we propose a machine-learning algorithm to predict the charge densities of crystals using a three-dimensional convolutional neural network (3DCNN). | Session 86: Machine Learning for Quantum Matter |
| 1312 | Data-driven studies of the magnetic anisotropy of two-dimensional magnetic materials | Xie, Yiqi; Rhone, Trevor David; Tritsaris, Georgios; Grånäs, Oscar; Kaxiras, Efthimios | Our data-driven study aims to uncover physical insights into the microscopic origins of magnetism in reduced dimensions and to demonstrate the success of a high-throughput computational approach for the targeted design of quantum materials with potential applications from sensing to data storage. | Session 86: Machine Learning for Quantum Matter |
| 1313 | Robust cluster expansion of multicomponent systems using machine learning with structured sparsity | Leong, Zhidong; Tan, Teck Leong | We present group lasso as an efficient method for obtaining robust cluster expansions (CE) of multicomponent systems, a popular computational technique for modeling the thermodynamic properties of such systems. | Session 86: Machine Learning for Quantum Matter |
| 1314 | Generalizing an Energy Predictor based on Wavelet Scattering for 3D Atomic Systems | Sinz, Paul; Swift, Michael; Brumwell, Xavier; Kim, Kwang Jin; Qi, Yue; Hirn, Matthew | In this work, we test the generalizability of our Li xSi energy predictor to properties that were not included in the training set, such as elastic constants and migration barriers. | Session 86: Machine Learning for Quantum Matter |
| 1315 | Using Machine Learning Models to Predict Higher-Level Quantities from Energy Models | Malenfant-Thuot, Olivier; Cote, Michel | Machine learning methods are now used more and more as a substitute for Density Functional Theory calculations due to their low computational costs. | Session 86: Machine Learning for Quantum Matter |
| 1316 | AI-guided engineering of nanoscale topological materials | Srinivasan, Srilok; Cherukara, Mathew; Eckstein, David; Avarca, Anthony; Sankaranarayanan, Subramanian; Darancet, Pierre | Inspired by recent progress in classifying topological phases in armchair, cove-edged and chevron graphene nanoribbons, we develop a high-throughput framework based on the computation of the Zak phase and the Z2 invariants using tight-binding and density functional theory to explore the topology of low-symmetry 1D and 2D periodic organic compounds. | Session 86: Machine Learning for Quantum Matter |
| 1317 | Motif-based machine learning for crystalline materials | Banjade, Huta; Zhang, Shanshan; Hauri, Sandro; Vucetic, Slobodan; Yan, Qimin | In this talk, we propose a novel representation of crystalline solid-state materials (such as complex metal oxides) as graphs composed of structure motifs. | Session 86: Machine Learning for Quantum Matter |
| 1318 | Machine learning powered kinetic energy functional finding in solid state physics | Ren, Hongbin; Dai, Xi; Wang, Lei | In this work, we use machine learning method to build a kinetic energy functional for 1D extended system, our solution combines the dimensionality reduction method with the Gauss process regression, and use a simple scaling trick to generalize the functional to 1D lattice with arbitrary lattice constant. | Session 86: Machine Learning for Quantum Matter |
| 1319 | Frustrated magnets and fermions with Neural Network Quantum States | Choo, Kenny Jing; Mezzacapo, Antonio; Neupert, Titus; Carleo, Giuseppe | On small test molecules, we achieve energies below chemical accuracy, and frequently improves upon coupled cluster methods. | Session 86: Machine Learning for Quantum Matter |
| 1320 | Learning the Ground State Wavefunction of Periodic Systems Using Recurrent Neural Networks | Roth, Christopher; MacDonald, Allan | Here, we present an approach for simulating periodic quantum systems using long short term memory networks (LSTMs), whose recurrent structure is able to efficiently capture invariance to discrete translations in the bulk. | Session 86: Machine Learning for Quantum Matter |
| 1321 | Calculating Renyi Entropies with Neural Autoregressive Quantum States | Wang, Zhaoyou; Davis, Emily | We therefore propose an improved “conditional sampling” method exploiting the autoregressive structure of the network ansatz, which outperforms direct sampling in both 1D and 2D Heisenberg models. | Session 86: Machine Learning for Quantum Matter |
| 1322 | Probabilistic Simulation of Quantum Circuits with the Transformer | Carrasquilla, Juan; Luo, Di; Perez, Felipe; Clark, Bryan; Milsted, Ashley; Volkovs, Maksims; Aolita, Mario | In this work, we present an exact probabilistic formulation of quantum dynamics through positive value-operator measurements (POVM). | Session 86: Machine Learning for Quantum Matter |
| 1323 | Variational optimization in the AI era | Clark, Bryan; Kochkov, Dmitrii; Luo, Di | We will describe these advancements and our effort to push forward, in the age of AI, the variational approach to the quantum many body problem. | Session 86: Machine Learning for Quantum Matter |
| 1324 | Deep neural network solution of the electronic Schrödinger equation | Hermann, Jan; Schätzle, Zeno; Noe, Frank | We demonstrate that PauliNet outperforms comparable state-of-the-art trial wave functions on atoms, small molecules, and a strongly correlated model system. | Session 86: Machine Learning for Quantum Matter |
| 1325 | Ab-Initio Solution of the Many-Electron Schrödinger Equation with Deep Neural Networks | Spencer, James; Pfau, David; Matthews, Alex; Foulkes, W Matthew | Calculating analytic solutions to the Schrödinger equation is impossible except in a small number of special cases. | Session 86: Machine Learning for Quantum Matter |
| 1326 | Towards neural network quantum states with nonabelian symmetries | Vieijra, Tom; Casert, Corneel; Nys, Jannes; De Neve, Wesley; Haegeman, Jutho; Ryckebusch, Jan; Verstraete, Frank | We demonstrate that this problem can be overcome by sampling in the basis of irreducible representations instead of spins, for which the corresponding ansatz respects the nonabelian symmetries of the system. | Session 86: Machine Learning for Quantum Matter |
| 1327 | Designing neural networks for stationary states in open quantum many-body systems | Yoshioka, Nobuyuki; Hamazaki, Ryusuke | We propose a new variational scheme based on the neural-network quantum states to simulate the stationary states of open quantum many-body systems [1]. | Session 86: Machine Learning for Quantum Matter |
| 1328 | Deep Learning-Enhanced Variational Monte Carlo Method for Quantum Many-Body Physics | Yang, Li; Leng, Zhaoqi; Li, Li; Patel, Ankit; Hu, Wenjun; Pu, Han | We introduce an importance sampling gradient optimization (ISGO) algorithm (arXiv:1905.10730), which significantly improves the computational speed of training DNN in VMC. | Session 86: Machine Learning for Quantum Matter |
| 1329 | Differentiable programming tensor networks and quantum circuits | Liu, JinGuo; Wang, Lei | This talk covers a brief survey of the state of the art differential programming frameworks, and their applications to condensed matter physics and quantum computing. | Session 86: Machine Learning for Quantum Matter |
| 1330 | Machine learning effective models from a Boltzmann perspective | Rigo, Jonas; Mitchell, Andrew | We investigate the derivation of effective models for quantum impurity type problems using machine learning methods. | Session 86: Machine Learning for Quantum Matter |
| 1331 | Automatic design of Hamiltonians | Pakrouski, Kiryl | We formulate an optimization problem of Hamiltonian design. | Session 86: Machine Learning for Quantum Matter |
| 1332 | Direct and Reverse Structure-Electronic Property Relationship Prediction with Deep Learning and Bayesian Optimization | Pimachev, Artem; Neogi, Sanghamitra | We propose a reverse approach based on Bayesian optimization to predict the structure from measured system’s properties of interest. | Session 86: Machine Learning for Quantum Matter |
| 1333 | Machine Learning of Single-Atom Defects in 2D Transition Metal Dichalcogenides with Sub-Picometer Precision | Khan, Abid; Clark, Bryan; Lee, Chia-Hao; Luo, Di; Shi, Chuqiao; Kang, Sangmin; Zhu, Wenjuan; Huang, Pinshane | By employing deep learning techniques, we quickly identify and classify various defect species, including metal substitutions, chalcogen vacancies, and chalcogen substitutions. | Session 86: Machine Learning for Quantum Matter |
| 1334 | Dictionary Learning in Fourier Transform Scanning Tunneling Spectroscopy | Wieteska, Jedrzej; Lau, Yenson; Hanaguri, Tetsuo; Wright, John; Eremin, Ilya; Pasupathy, Abhay | We have developed a new algorithm based on nonconvex optimization, applicable to any microscopy modality, that directly uncovers the fundamental motifs present in a real-space image. | Session 86: Machine Learning for Quantum Matter |
| 1335 | Machine Learning Tool for Crystal Structure Predictions | Stanev, Valentin; Liang, Haotong; Kusne, Aaron; Takeuchi, Ichiro | In this talk I will present an alternative approach that utilizes machine learning for crystal structure predictions. | Session 86: Machine Learning for Quantum Matter |
| 1336 | Transferable and interpretable machine learning model for four-dimensional scanning transmission electron microscopy data | Matty, Michael; Cao, Michael; Chen, Zhen; Li, Li; Muller, David | We benchmark against conventional approaches using quantitative metrics for resolution and contrast. | Session 86: Machine Learning for Quantum Matter |
| 1337 | Tight-binding deep learning approach to band structures calculations | Sapper, Florian; Peano, Vittorio; Marquardt, Florian | In this talk we present a numerical method for band structure calculations that is based on deep neural networks (NNs). | Session 86: Machine Learning for Quantum Matter |
| 1338 | Temperature and Phase Dependence of Carrier Diffusion in Single Crystal MAPbI3 Perovskite Microstructures | McClintock, Luke; Xiao, Rui; Hou, Yasen; Travaglini, Henry; Abramovitch, David; Tan, Liang; Yu, Dong | Here, we have investigated carrier diffusion lengths in single crystal methylammonium lead iodide (MAPbI 3) microstuctures via scanning photocurrent microscopy. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1339 | Quantifying exciton heterogeneities in mixed-phase organometal halide multiple quantum wells via Stark spectroscopy studies | Amerling, Eric; Baniya, Sangita; Lafalce, Evan; Blair, Steve; Vardeny, Zeev; Whittaker-Brooks, Luisa | In this study, we investigated the structural and optoelectronic properties of (C 4H 9NH 3) 2(CH 3NH 3) n-1Pb nI 3n+1, varying n from 1 to 4. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1340 | Angle-Resolved Time-Resolved Microwave Conductivity | Chattopadhyay, Shirsopratim; Labram, John | Here we present a novel approach for resolving charge carrier mobilities in different planes within a sample. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1341 | Peculiar Defects Behavior in Charge Recombination of Metal Halide Perovskites | Chu, Weibin; Saidi, Wissam; Zhao, Jin; Prezhdo, Oleg | Considering similar results found in MAPbI 3, we propose that the strong defect tolerance is general to the metal halide perovskites. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1342 | Small Urbach energies in halide perovskites due to anharmonicity and short-range correlated disorder | Gehrmann, Christian; Egger, David | Here, we present our findings on spatial correlations in the disorder potential induced for electronic states due to nuclear dynamics in several HaPs. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1343 | The evolution of ultrafast carrier dynamics in situ perovskite solar cells | Liu, Exian; Tong, Jinhui; Kobbekaduwa, Kanishka; Adhikari, Pan; Zhu, Kai; Gao, Jianbo | Aim to elucidate ultrafast carrier dynamics in-situ PSC, in this talk, we present the carrier dynamics in-situ organic–inorganic halide perovskite solar cells utilizing ultrafast photocurrent spectroscopy with sub-40 picosecond time. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1344 | Defects in polymorphous cubic halide perovskites: coexistence of shallow and deep vacancy transition levels | Dalpian, Gustavo; Zhao, Xingang; Zunger, Alex | We have studied anion vacancies in different, inequivalent lattice sites in the polymorphous network of CsSnI 3, CsPbI 3, MaPbI 3, and CsPbBr 3, finding that all except CsPbBr 3 have shallow transition levels whereas the latter has a bimodal distribution with some deep levels (mostly shallow). | Session 87: Transport and Device Physics of Halide Perovskites |
| 1345 | Hot Carrier Dynamics in Bulk and 2D Perovskites | Sourabh, Shashi; Whiteside, Vincent; Esmaielpour, Hamidreza; Durant, Brandon; Eperon, Giles; Beard, Matthew; Sellers, Ian | Hot Carrier Dynamics in Bulk and 2D Perovskites | Session 87: Transport and Device Physics of Halide Perovskites |
| 1346 | Unravelling free carrier and exciton dynamics in hybrid organic-inorganic perovskites using transient absorption spectroscopy | Qing, Chang; Zhao, Daming; Hu, Hongwei; Lam, Yeng Ming; Chia, Ee Min | Unravelling free carrier and exciton dynamics in hybrid organic-inorganic perovskites using transient absorption spectroscopy | Session 87: Transport and Device Physics of Halide Perovskites |
| 1347 | Observation of large negative thermo-optic coefficients in lead halide perovskites | Handa, Taketo; Tahara, Hirokazu; Kanemitsu, Yoshihiko | Here, we report that the halide perovskite CH 3NH 3PbCl 3 shows a large negative thermo-optic coefficient, i.e., a distinct decrease of the refractive index upon temperature rise [2]. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1348 | Breaking the Defect Bottleneck in Halide Perovskite Semiconductors | Walsh, Aron | I will cover charge compensation mechanisms [2], carrier trapping phenomena[3], the effect of grain boundaries[4], and how this understanding can be applied to engineer defect populations and distributions. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1349 | Electrohydrodynamically Assisted Deposition of organo-metallic hybrid perovskite thin films for Photovoltaics applications | DiBenedetto, Albert; Delmas, William; Ghosh, Sayantani | In this talk, we will present different perovskite solar cell prototypes with different space qualified substrates that were prepared via EHD assisted deposition. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1350 | Coupling Alkali Metal and Organic Cations to Form Oriented Quasi-2D Perovskite for High-performance Solar Cells | Hu, Qin; Song, Jingnan; Liu, Feng; Russell, Thomas | A dual additive approach is applied, in which the synergic efforts of alkali metal cation and polar solvent lead to high quality 2D perovskite thin film with well orientation. | Session 87: Transport and Device Physics of Halide Perovskites |
| 1351 | Strain effects on bulk α-RuCl3 and α-RuCl3/graphene bilayer | Biswas, Sananda; Li, Ying; Kaib, David; Riedl, Kira; Winter, Stephen; Knolle, Johannes; Valentí, Roser | We discuss the effect of electronic proximity of α-RuCl 3 to graphene which gives rise to an insulator to metal transition in α-RuCl 3 with the Fermi energy located close to the bottom of the upper Hubbard band of the t 2g manifold. | Session 88: Kitaev Magnetism: Experiment |
| 1352 | Magneto-oscillations in the Thermal Conductivity of Kitaev Magnet RuCl3 | Czajka, Peter; Gao, Tong; Lin, Jingjing; Hirschberger, Max; Banerjee, Arnab; Lampen-Kelley, Paula; Yan, Jiaqiang; Mandrus, David; Nagler, Stephen; Ong, N. Phuan | Here, we report a striking new observation in the system’s thermal transport physics. | Session 88: Kitaev Magnetism: Experiment |
| 1353 | Kitaev-Γ-Heisenberg exchange in Ni3+ honeycomb magnet NaNi2BiO6-δ | Scheie, Allen; Broholm, Collin; Ross, Kate; Stavropoulos, Panagiotis Peter; Seibel, Elizabeth; Rodriguez-Rivera, Jose; Tang, Joel; Li, Yi; Kee, Hae-Young; Cava, Robert | We present experimental and theoretical evidence for bond-dependent Kitaev-Γ-Heisenberg exchange in honeycomb Ni 3+ magnet NaNi 2BiO 6-δ. | Session 88: Kitaev Magnetism: Experiment |
| 1354 | Intermediate magnetic phase of the proximate Kitaev system in the in-plane magnetic field | Kim, Beom Hyun; Sota, Shigetoshi; Shirakawa, Tomonori; Son, Young-Woo; Yunoki, Seiji | In the study, we verify that a simple magnetic model with a ferromagnetic Kitaev interaction and antiferromanetic third nearest neighbor Heisenberg interaction ( K- J 3 model) can give successfully the intermediate phase in the in-plane magnetic field. | Session 88: Kitaev Magnetism: Experiment |
| 1355 | Analysis of the high-field evolution of magnetic excitations in α-RuCl3 | Kaib, David; Winter, Stephen; Valenti, Roser | We theoretically analyze these and compare the response of realistic anisotropic models. | Session 88: Kitaev Magnetism: Experiment |
| 1356 | Half-integer quantized thermal Hall conductance without out-of-plane magnetic field in a chiral spin liquid state of α-RuCl3 | Kasahara, Yuichi; Yokoi, Taichi; Ma, Sixiao; Kasahara, Shigeru; Shibauchi, Takasada; Kurita, Nobuyuki; Tanaka, Hidekazu; Nasu, Joji; Motome, Yukitoshi; Hickey, Ciaran; Trebst, Simon; Matsuda, Yuji | Half-integer quantized thermal Hall conductance without out-of-plane magnetic field in a chiral spin liquid state of α-RuCl3 | Session 88: Kitaev Magnetism: Experiment |
| 1357 | New Kitaev Magnet with Compelling Thermodynamic Evidence of Proximity to the Kitaev Spin-Liquid | Bahrami, Faranak; Lafargue-Dit-Hauret, William; I. Lebedev, Oleg; Movshovich, Roman; Yang, Hung-Yu; Broido, David; Rocquefelte, Xavier; Tafti, Fazel | Recent theoretical studies predict two potential signatures of a QSL at finite temperatures: a scaling behavior of thermodynamic quantities and a two-step release of the magnetic entropy. | Session 88: Kitaev Magnetism: Experiment |
| 1358 | Quasiparticle Relaxation Dynamics in the Kitaev Hyperhoneycomb β-Li2IrO3 | Kissin, Peter; Ruiz, Alejandro; Kim, Peter; Poore, Max; Rai, Ananya; Vranas, Mayia; Analytis, James; Frano, Alex; Averitt, Richard | We study quasiparticle relaxation dynamics in single crystals of the three dimensional Kitaev hyperhoneycomb β-Li 2IrO 3 (LIO) using time-resolved optical pump-probe spectroscopy (OPPS). | Session 88: Kitaev Magnetism: Experiment |
| 1359 | A rare-earth Kitaev material candidate YbCl3 | Emmanouilidou, Eve; Xing, Jie; Cao, Huibo; Hu, Chaowei; Liu, Jinyu; Graf, David; Ramirez, Arthur; Chen, Gang; Ni, Ni | Here we propose a new Kitaev material candidate YbCl 3. | Session 88: Kitaev Magnetism: Experiment |
| 1360 | Field-angle-resolved specific heat measurements in the Kitaev material α-RuCl3 | Tanaka, Ohei; Harasawa, Ryuhei; Mizukami, Yuta; Konczykowski, Marcin; Kurita, Nobuyuki; Tanaka, Hidekazu; Moon, Eun-Gook; Kasahara, Yuichi; Matsuda, Yuji; Hashimoto, Kenichiro; Shibauchi, Takasada | Here, we report specific heat measurements under in-plane magnetic fields up to 7 T on electron-irradiated α-RuCl 3 single crystals, in which a systematic suppression of T N and H* was observed. | Session 88: Kitaev Magnetism: Experiment |
| 1361 | Ruthenium Substitution in Beta-Lithium Iridate | Vranas, Mayia; Ruiz, Alejandro; Frandsen, Benjamin; Acharya, Arani; Nagarajan, Vikram; Lopez, Gilbert; Nair, Nityan; Breznay, Nicholas; Islam, Zahirul; Frano, Alex; Analytis, James | In this work, we present thermodynamic, resonant X-ray diffraction, and muon spin relaxation studies on ruthenium-doped beta-lithium iridate (β-Li 2Ru xIr 1-xO 3). | Session 88: Kitaev Magnetism: Experiment |
| 1362 | Confinement of fractional excitations in the 3D Kitaev magnet β-Li2IrO3 | Wang, Yiping; Ruiz, Alejandro; Analytis, James; Burch, Kenneth | We identified the polarization and temperature dependence of the magnons and fractional excitations in Raman. | Session 88: Kitaev Magnetism: Experiment |
| 1363 | Evolution of magnetic phases in beta-Li2IrO3 under high magnetic fields | Nagarajan, Vikram; Modic, Kimberly; Singleton, John; Chan, Mun; Wang, Kevin; Analytis, James | In this talk, we describe how these phases evolve under strong magnetic fields using the state-of-the art technique of resonant torsion magnetometry. | Session 88: Kitaev Magnetism: Experiment |
| 1364 | High-resolution RIXS as a probe of Kitaev Magnetic Excitations in β-Li2IrO3 | Ruiz, Alejandro; Allen, Anthony; Nagarajan, Vikram; Korelek, Jake; Upton, Mary; Kim, Jongho; Breznay, Nicholas; Analytis, James; Casa, Diego; Frano, Alex | In this work, we used a high-resolution RIXS spectrometer (FWHM=10meV) to measure the low-energy spin excitations in β-Li2IrO3 under a 2T applied field. | Session 88: Kitaev Magnetism: Experiment |
| 1365 | Anamolous, Anisotropic and Extended Nonlinear Susceptibility in a-RuCl3 | Shivaram, Bellave; Holleis, Ludwig; Prestigiacomo, Joseph; Fan, Zhije; Nishimoto, Satoshi; Yan, Jiaqiang; Banerjee, Arnab; Osofsky, Michael; Van den Brink, Jeroen; Chern, Gia-Wei; Mandrus, David; Nagler, Stephen | In proximate Kitaev a-RuCl3, we establish a radically new behavior of the nonlinear susceptibility hitherto not established. | Session 88: Kitaev Magnetism: Experiment |
| 1366 | Topological Magnetic-Spin Structures in Two-Dimensional Van Der Waals Cr2Ge2Te6 | Han, Myung-Geun; Garlow, Joseph; Liu, Yu; Zhang, Huiqin; DiMarzio, Donald; Knight, Mark; Petrovic, Cedomir; Jariwala, Deep; Zhu, Yimei | Using direct imaging by cryo-Lorentz transmission electron microscopy we report that topologically nontrivial magnetic-spin states, skyrmionic bubbles, can be realized in exfoliated insulating 2D van der Waals Cr 2Ge 2Te 6. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1367 | Multiple ferromagnetic transitions and structural distortion in the van der Waals ferromagnet VI3 at ambient and finite pressures | Gati, Elena; Inagaki, Yuji; Kong, Tai; Cava, Robert; Furukawa, Yuji; Bud’ko, Sergey; Canfield, Paul | Here, we present a thermodynamic (specific heat and magnetization) and microscopic NMR study on bulk single crystals of the recently discovered ferromagnetic vdW material VI 3 at ambient and finite pressures [1]. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1368 | First principles Calculation of Dzyaloshinskii–Moriya interaction in 2D magnetic van der Waals heterostructures | Huang, Kai; Shao, Ding-Fu; Tsymbal, Evgeny | Here, we predict the emergence of a large DMI in bilayer magnetic van der Waals heterostructures composed of a 2D ferromagnetic metal Fe 3GeTe 2 monolayer and a nonmagnetic monolayer. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1369 | Realization of very large Dzyaloshinskii-Moriya interaction and skyrmion states in two-dimensional Janus manganese dichalcogenides | Liang, Jinghua; wang, weiwei; Du, Haifeng; Chshiev, Mairbek; Fert, Albert; Yang, Hongxin | In this report, we perform first-principles calculations to demonstrate that significant DMI can be obtained in a series of Janus monolayers of manganese dichalcogenides MnXY (X/Y = S, Se, Te, X ≠ Y) in which the difference between X and Y on the opposites sides of Mn breaks the inversion symmetry. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1370 | Topological Spin Textures in Janus Monolayers of Chromium Trihalides Cr(I,X)3 | Xu, Changsong; Feng, Junsheng; Nahas, Yousra; Prohorenko, Sergei; Xiang, Hongjun; Bellaiche, Laurent | Here we propose the fabrication of Cr(I,X) 3 Janus monolayers, in which the Cr atoms are covalently bonded to the underlying I ions and top-layer Br or Cl atoms. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1371 | Electrical excitation of superfluid- and string-like domain wall modes in layered van der Waal antiferromagnets | Rahman, Mohammad Mushfiqur; Rustagi, Avinash; Tserkovnyak, Yaroslav; Upadhyaya, Pramey | Motivated by these developments, we theoretically demonstrate the electrical excitation of superfluid- and string-like modes harbored by the antiferromagnetically coupled domain walls of bilayer CrI3. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1372 | Merons in Monolayer CrCl3 | Lu, Xiaobo; Fei, Ruixiang; Yang, Li | Here, using first principles and Monto Carlo simulations, we propose that monolayer chromium chloride (CrCl 3) can be a promising candidate to observe paired magnetic vortex type and antivortex type topological defects, which are so-called merons. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1373 | Anomalous spin-Hall effect in 2D Cr-based materials | Dahnovsky, Yuri; Zadorozhnyi, Andrei | We study the THE in various systems on 2D magnetic materials (CrIS 3, CrCl 3, and CrBr 3). | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1374 | Skyrmions in TMD-based antiferromagnetic triangular lattices | Raeliarijaona, Aldo; Fang, Wuzhang; Chang, Po-Hao; Belashchenko, Kirill; Kovalev, Alexey | We study the adsorption of magnetic transition metal atoms (Cr, Mn, Fe, and Co) on top of a TMDs such as MoS2 or WSe2, where the transition metal atoms form a triangular lattice. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1375 | Chirally coupled nanomagnets | Luo, Zhaochu; Dao, Trong Phuong; Hrabec, Aleš; Vijayakumar, Jaianth; Kleibert, Armin; Baumgartner, Manuel; Kirk, Eugenie; Cui, Jizhai; Savchenko, Tatiana; Krishnaswamy, Gunasheel; Heyderman, Laura; Gambardella, Pietro | In this work, we demonstrate an alternative method to control the lateral coupling between adjacent magnetic nanostructures [3] based on the interfacial Dzyaloshinskii-Moriya interaction (DMI). | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1376 | Tuning Magnetic Order with Iron Intercalation in Transition Metal Dichalcogenides | John, Caolan; Doyle, Spencer; Maniv, Eran; Analytis, James | I will present magnetization and thermodynamic measurements that indicate antiferromagnetic order in iron intercalated NbS 2. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1377 | Electrical switching in a magnetically intercalated transition metal dichalcogenide | Maniv, Eran; Nair, Nityan; John, Caolan; Doyle, Spencer; Orenstein, Joseph; Analytis, James | Here, we present measurements on the intercalated TMD Fe 1/3NbS 2 which exhibits antiferromagnetic ordering below 42K. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1378 | Evidence for a pressure-induced gapped spin-liquid ground state in a coupled ladder antiferromagnet C9H18N2CuBr4 | Hong, Tao; Ying, Tao; Huang, Qing; Dissanayake, Sachith; Qiu, Yiming; Turnbull, Mark M; Podlesnyak, Andrey; Wu, Yan; Cao, Huibo; Tennant, David; Schmidt, Kai; Wessel, Stefan | Here we present a comprehensive neutron scattering study on a spin-1/2 coupled ladder antiferromagnet C 9H 18N 2CuBr 4 (DLCB for short) under applied hydrostatic pressure. | Session 89: Spin Textures and Chiral Magnetism in 2D Materials |
| 1379 | The Case for Octupolar Order in Cubic 5d2 Double Perovskites | Gaulin, Bruce | Our neutron powder diffraction measurements place an upper limit on any possible ordered dipole moment of ~ 0.1 μ B. To understand these results, we introduce a model for orbital repulsion between the two 5d electrons in Os 6+ in these materials. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1380 | Octupolar order in d-orbital Mott insulators. | Paramekanti, Arun; Maharaj, Dalini; Gaulin, Bruce | We discuss the quantum magnetism of $J=2$ ions which can be realized in spin-orbit coupled oxides with $5d^2$ transition metal ions. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1381 | Neutron scattering study of magnetic excitation in spinel structure spin-orbital coupling compound CuGa2O4 | Xu, Zhijun; Xu, Guangyong; Sapkota, Aashish; qiu, yimin; Gu, Genda; Tranquada, John | We report neutron scattering measurements on a single crystal CuGa2O4 sample. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1382 | d-Orbital Occupancy Systematics of 4d/5d Row Transition Metal Oxides by X-Ray Absorption Near Edge Spectra (XANES) | Kurywczak, Eric; Sahiner, Mehmet; Croft, Mark | We have used non-linear least-squares fitting across the near-edge region of the various 4d row and 5d row TM oxides in order to investigate the systematics of the d-orbital occupancy and the XANES white line features for t 2g and e g symmetry orbitals. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1383 | From multipolar to spin-lattice disordered states in Mott insulators | Jackeli, George | We theoretically explore how in the Mott insulating compounds the spin-orbit coupling could give rise to unusual disordered (glass or liquid) states of spin-orbital or spin-lattice degrees of freedom depending on the local d-electron counting. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1384 | Observation of Spin Glassy Behavior in Sr3(Ru0.64Mn0.36)2O7 | Nepal, Roshan; Xing, Lingyi; Jin, Rongying | We report the magnetic properties of 36% Mn doped single-crystalline Sr 3(Ru 1-xMn x) 2O 7 (x = 0.36). | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1385 | A muSR study of current-induced destruction of order in Ca2RuO4 | Nugent, Matthew; Luke, Graeme; Beare, James; Braden, Markus; Jenni, Kevin; Sharma, Sudarshan; Rutherford, Megan; Sheng, Qi | Past work has shown that Ca 2RuO 4 is a Mott insulator, but can be switched to a semimetallic state with the application of a reasonable amount of current. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1386 | Electronic and magnetic properties in barium iridium oxides | Chen, Xiang; Yuan, Dongsheng; Bourret-Courchesne, Edith; Birgeneau, Robert | Here we introduce detailed experimental studies on those spin chain barium iridium oxides, which might be another intriguing system for engineering unusual electronic and magnetic ground states. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1387 | First-Principles Calculations of the atomic and magnetic structure of perovskite oxides SrMoO3, PbMoO3 and LaMoO3 | Lee-Hand, Jeremy; Dreyer, Cyrus | We use first-principles calculations based on density-functional theory (DFT) plus Hubbard U to investigate the family of perovskite molybdenates: SrMoO 3, PbMoO 3, and LaMoO 3 in order to determine their ground-state atomic and magnetic structures. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1388 | Random singlet state in the spin liquid candidate Ba5CuIr3O12 | Gorbunov, Denis; Volkov, Pavel; Won, Choong-Jae; Kim, Jaewook; Ye, Mai; Kim, Heung-Sik; Pixley, Jed; Cheong, Sang-Wook; Blumberg, Girsh | We study the thermodynamic and high magnetic field properties of the magnetic insulator Ba 5CuIr 3O 12, a QSL candidate showing no magnetic order down to 2 K. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1389 | Valence bond solids and hidden order phases in a pyrochlore U(1) quantum spin liquid | Yang, Hyeok-Jun; Lee, SungBin | Here, we study the pyrochlore XXZ model with farther and competing exchange interactions. | Session 90: Multipolar order and strongly spin-orbit coupled oxides |
| 1390 | Electro-reflectance study of low-voltage turn-on in triplet fusion OLED materials | Engmann, Sebastian; Bittle, Emily; Richter, Lee; Gundlach, David | In this presentation we will present electro-reflection (ER) studies that elucidate the built-in potentials in 2 prototypical OLED devices based on Rubrene and DiFTES-ADT as the emitting layer. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1391 | The rationale behind the acceptor-donor-acceptor chemical design of non-fullerene acceptors | Markina, Anastasia; Laquai, Frederic; Andrienko, Denis | We explain why excitons dissociation into charge-transfer (CT) states, and the subsequent CT state splitting into charge-separated (CS) states, are efficient in NFAs-based solar cells. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1392 | Engineering Diffusion of Charge-Transfer States at Organic Semiconductor Heterojunctions | Concannon, Nolan; Zhang, Tao; Holmes, Russell | In this work, we examine CT state diffusion in donor-acceptor mixtures via photoluminescence quenching methods. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1393 | First-Principles Theory for Understanding Excitons in Stacked Organic Assemblies | Sharifzadeh, Sahar | Here, we utilize first-principles theory to investigate the optoelectronic and vibrational properties of stacks of functionalized PTCDI DNA base surrogates as a model system to study inter- and intra-molecular interactions. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1394 | Quantum Yield Enhancement of BDMO-PPV During Photo-Degradation | Deutsch, Matthew; Park, Heungman | Using photoluminescence spectroscopy, infrared spectroscopy, and light scattering measurements we intend to define the physical and chemical processes behind the photo-degradation of BDMO-PPV. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1395 | Photospintronics- Light-controlled spin transport in hybrid chiral oligopeptide-nanoparticle structures | Roy, Rupshali | Photospintronics- Light-controlled spin transport in hybrid chiral oligopeptide-nanoparticle structures | Session 91: Organic Electronics: Charge Transport and Theory |
| 1396 | Morphology-Dependent Triplet Exciton Diffusion in Vapor Deposited Pentacene Thin Films | Shi, Kaicheng; Curtin, Ian; Healy, Andrew; Zhang, Tao; Blank, David; Holmes, Russell | Morphology-Dependent Triplet Exciton Diffusion in Vapor Deposited Pentacene Thin Films | Session 91: Organic Electronics: Charge Transport and Theory |
| 1397 | Polaronic effects and charge transport in donor-acceptor semiconducting polymers | Wang, Xiao; Register, Leonard; Dodabalapur, Ananth | We invoke the statistical distribution of carrier free paths and consider the carriers with small free paths as effectively localized due to strong scattering. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1398 | Switching dynamics in Croconic Acid thin film | Jiang, Xuanyuan; Buragohain, Pratyush; Poddar, Shashi; Lu, Haidong; Gruverman, Alexei; Xu, Xiaoshan | And the KAI domain growth model is used to fit with this switching dynamic behavior. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1399 | Self-assembled monolayer formation of linear molecules onto a FCC(111) surface | Cisternas, Eduardo; Dos Santos, Gonzalo; Flores, Marcos; Vogel, Eugenio; Ramirez-Pastor, Antonio Jose | By performing computational calculations based on the density functional theory, we have obtained interaction energies for different configurations of two adsorbed molecules over a Au(111) surface. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1400 | Controlling energy levels and Fermi level en route to fully tailored energetics in organic semiconductors | Warren, Ross; Privitera, Alberto; Kaienburg, Pascal; Lauritzen, Andreas; Thimm, Oliver; Nelson, Jenny; Riede, Moritz | Here, we combine two approaches from band engineering and molecular doping to demonstrate controlled shifts in ionisation potential and Fermi level of an organic thin film. | Session 91: Organic Electronics: Charge Transport and Theory |
| 1401 | Exploring topological superconductivity in topological insulator – superconductor hybrid devices | Kayyalha, Morteza | I will present a systematic study of the superconducting contact transparency and its influence on the two-terminal conductance measurements and provide a non-Majorana explanation for the appearance of the half-quantized plateau in the QAH – Nb hybrid devices. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1402 | Majorana π-junctions in full-shell nanowire SQUIDs | Razmadze, Davydas; O’Farrell, Eoin; Krogstrup, Peter; Marcus, Charles | Recent studies of InAs nanowires covered by full-shell Al superconductor showed signatures of Majorana zero modes (MZMs) around one applied axial-flux quantum [1]. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1403 | Quantum anomalous Hall effect using interfacial Green’s function method for an accurate mass gap | Kim, Jinwoong; Vanderbilt, David | In this study, we enumerate several combinations of topological crystalline insulators and magnetic insulators in a search for an optimal electronic structure, where a large mass gap is isolated inside a bulk insulating gap. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1404 | Topological phase transition in epitaxial single layer FeTe1-xSex/SrTiO3(001) | Zou, Qiang; Ge, Zhuozhi; Yan, Chenhui; Zhang, Huimin; Li, Lian | In this work, we demonstrate both superconducting and topological phase transitions at higher temperature in FeTe 1-xSe x thin films, by reducing its thickness down to one atomic layer. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1405 | Tuning the electrical properties of GdSb thin films by epitaxial strain | Inbar, Hadass; Chatterjee, Shouvik; Pendharkar, Mihir; Chang, Yu hao; Bocheff, Maxwell; Guo, Taozhi; Brown-Heft, Tobias; Fedorov, Alexei; Read, Dan; Palmstrom, Chris | Early studies of rare-earth monopnictide (RE-V) thin films have focused mainly on their applications as buried ohmic contacts for III-V semiconductors, THz emitters and detectors, thermoelectrics, diffusion barriers, and plasmonic heterostructures. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1406 | Quantum transport in in-plane selective area InSb-Al nanowire quantum networks | Xu, Di; Op het Veld, Roy; Schaller, Vanessa; Jung, Jason; Wang, Qingzhen; De Moor, Michiel; Hesselmann, Bart; Vermeulen, Kiefer; Bommer, Jouri; Lee, Joon Sue; Pendharkar, Mihir; Palmstrom, Chris; Bakkers, Erik; Kouwenhoven, Leo; Zhang, Hao | Here, we implement an in-plane selective-area growth technique for InSb-Al allowing complex semiconductor-superconductor nanowire networks with excellent quantum transport properties. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1407 | Microwave spectroscopy reveals the quantum geometric tensor of topological Josephson matter | Klees, Raffael; Rastelli, Gianluca; Cuevas, Juan Carlos; Belzig, Wolfgang | We theoretically study properties of Andreev states in topological Josephson matter and demonstrate that the quantum geometric tensor of Andreev states can be extracted by synthetically polarized microwaves [3]. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1408 | Observation of the non-Hermitian Skin effect in topolectric circuits | Helbig, Tobias; Hofmann, Tobias; Lee, Ching Hua; Greiter, Martin; Thomale, Ronny | In this talk, we present a periodic circuit network, where gain and loss conspire with the violation of reciprocity to affect this principle dramatically. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1409 | Reciprocal skin effect and its realization in a topolectrical circuit | Hofmann, Tobias; Helbig, Tobias; Schindler, Frank; Lee, Ching Hua; Greiter, Martin; Neupert, Titus; Thomale, Ronny | In this talk we present a model which shows extensive eigenmode localization at its boundaries while preserving reciprocity. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1410 | Tuning Electronic Band Properties in Binary Chalcogenides with Extrinsic and Intrinsic Strain: A First-Principles Study | Reid, Thomas; Nayak, Sanjeev; Geilhufe, R.M.; Alpay, Pamir; Balatsky, Alexander | We use first-principles Density Functional theory (DFT) method to control for the influence of the exchange-correlation functional (XCF) and slab thickness. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1411 | Predicting two-dimensional topological phases in Janus materials by substitutional doping in transition metal dichalcogenide monolayers | Maghirang III, Aniceto; Huang, Zhi-Quan; Villaos, Rovi Angelo B.; Hsu, Chia-Hsiu; Feng, Liang-Ying; Florido, Emmanuel; Lin, Hsin; Bansil, Arun; Chuang, Feng-Chuan | Using systematic first-principles computations, we propose a class of Janus 2D materials based on the monolayers MX 2 (M=V, Nb, Ta, Tc, or Re; X=S, Se, or Te) with halogen (F, Cl, Br, or I) or pnictogen (N, P, As, Sb, or Bi) substitution. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1412 | Controlling in-gap states in graphene nanoribbons via tunable topological phases | Zhao, Fangzhou; Louie, Steven | We show, through first-principles calculations, that by applying an experimentally accessible transverse electric field, certain designer GNRs may be tuned from a topologically trivial to a nontrivial phase or vice versa. | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1413 | Dynamic nuclear spin polarization induced by Edelstein effect at Bi(111) surfaces | Jiang, Zijian; Soghomonian, Victoria; Heremans, Jean | Dynamic nuclear spin polarization induced by Edelstein effect at Bi(111) surfaces | Session 92: Topological Materials: Thin Films and Hybrid Structures |
| 1414 | Plutonium in high magnetic fields. | Wartenbe, Mark; Tobash, Paul; Harrison, Neil; Singleton, John; Winter, Laurel | We present the data in the context of gaining in site into the 5f electrons physics of the material and its ephemeral magnetic moment. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1415 | Ab initio study of the properties of liquid uranium for temperatures up to 2050 K | Gonzalez, Luis; Gonzalez del Rio, Beatriz; Gonzalez, David | In this contribution we analyze the properties of liquid U, studied through ab initio methods, for three temperatures in the temperature range between its melting point (1405 K) and 2050 K. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1416 | Theoretical investigations of the tritium diffusion pathways in γ-LiAlO2 pellets | Paudel, Hari; Jia, Ting; Duan, Yuhua | For TPBARs to enable effective tritium production in PWRs and to improve the performances of these components, we are investigating the 3H solubility and diffusion pathways in the bulk and surface of γ-LiAlO 2 with different concentrations of lithium defects. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1417 | Complex Phase Behavior of U3O8 | Miskowiec, Andrew; Niedziela, Jennifer; Spano, Tyler; Finkeldei, Sarah; Hunt, Rodney; Ambrogio, Michael | We present preliminary investigations into possible resolutions of this observation, including temperature dependent Raman and x-ray diffraction measurements. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1418 | Crystal-field states of UO2 probed by directional dependence of nonresonant inelastic x-ray scattering | Sundermann, Martin; Van der Laan, Gerrit; Severing, Andrea; Simonelli, Laura; Lander, Gerard; Haverkort, Maurits; Caciuffo, Roberto | Crystal-field states of UO2 probed by directional dependence of nonresonant inelastic x-ray scattering | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1419 | Excess Electrons on Reduced AnO2 (111) Surfaces (An = Th, U, Pu) and Their Impacts on Catalytic Water Splitting | Wang, Gaoxue; Batista, Enrique; Yang, Ping | In this talk, I will discuss our first-principle study of the electronic structure of excess electrons from oxygen vacancies on AnO 2 (111) surfaces. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1420 | First Principles Investigation of the electronic and magnetic structure of Pu6Fe | Hernandez, Sarah; Wills, John | This work will present density functional theory calculations using the all-electron full-potential linearized augmented-plane-wave plus local orbital basis method as implemented in the WIEN2k code. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1421 | Magnetic torque of USb single crystals | Ding, Xiaxin; Shrestha, Keshav; Zimmermann, Ingrid; McDonald, Ross; Weickert, Franziska; Harrison, Neil; Jaime, Marcelo; Salamon, Myron; Griveau, J-C.; Smith, James; Gofryk, Krzysztof | During the talk we will present results of our recent magnetic torque measurements performed on high-quality single crystals of USb at temperatures below and above T_N. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1422 | 5f-electron localization in metallic PuPdSn | Gofryk, Krzysztof; Griveau, J-C.; Colineau, Eric; Caciuffo, Roberto; Smith, James | Here we present our detailed studies on the structural, magnetic, thermal, and transport properties of PuPdSn. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1423 | Electronic structure of GdNi and HoNi | Chuang, Chien Wen; Lin, Hong-Ji; de Groot, F. M. F.; Chang, F. H.; Chen, Chien-Te; Chin, Y. Y.; Liao, Y. F.; Tsuei, Ku-Ding; Chelvane, J. Arout; Nirmala, R.; Chainani, Ashish | We investigate the electronic structure of GdNi and HoNi using Hard hard X-ray photoemission spectroscopy (HAXPES). | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1424 | The structural and mechanically properties of alloyed Zr-50Nb and Zr-22Nb systems with Sn and Co at varied temperature | Malebati, Magoja; Ngoepe, Phuti; Chauke, Hasani | In this work, density functional theory was used to investigate the structural and mechanical properties of Zr-50Nb-X and Zr-22Nb-X with alloying elements Sn and Co. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1425 | Magnetic frustration and magnetic correlations in YbMn2Sb2 single crystals | Ribeiro, Raquel; Munevar, Julian; Arantes, Fabiana; Mendonça-Ferreira, Leticie; Avila, Marcos; Morenzoni, Elvezio | Magnetic frustration and magnetic correlations in YbMn2Sb2 single crystals | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1426 | Study of the Band Structure and the Origin of the XMR Effect in La1-xCexBi | Hao, Yujie; Ma, Xiao-Ming; Li, Bin; Guo, Yanping; Yue, Feng; Lu, Rui’e; Liu, Chang | In this work, La 1-xCe xBi single crystals with x ranging from 0 to 0.2 is studied. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1427 | The interplay of electronic, magnetic and structural properties of GdB6 from first principles | Xu, Shaowen | We perform a systematical density-functional theory (DFT) study of GdB 6 by using the generalized-gradient approximation and considering the electron interaction parameter U. | Session 93: Metals: Actinide, Nuclear Related and Rare Earth Physics |
| 1428 | Atomically Thin Wafers and Superlattices | Park, Jiwoong | In this talk, I will discuss how we can realize these integrated circuits thin and free-standing, just like paper, using two-dimensional materials based on transition metal dichalcogenides and hybrid superlattices. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1429 | Chirality transfer through multistep reaction processes towards the synthesis of enantiopure chiral graphene nanoribbons | Mohammed, Mohammed Sabri G.; Merino-Díez, Nestor; Castro-Esteban, Jesús; Colazzo, Luciano; Berdonces, Alejandro; Lawerence, James; Ignacio Pascual, José; Peña, Diego; García de Oteyza, Dimas | In this work we show how, starting from enantiopure reactants deposited onto Au(111), their chirality is sequentially transferred to the polymers and finally to the GNRs with an excellent level of selectivity. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1430 | Narrow optical transition linewidth of MoS2 monolayers grown by chemical vapor deposition : impact of dielectric disorder | Shree, Shivangi; George, Antony; Lehnert, Tibor; Neumann, Christof; Benelajla, Meryem; Robert, Cedric; Marie, Xavier; Taniguchi, Takashi; Watanabe, Kenji; Kaiser, Ute; Turchanin, Andrey; Urbaszek, Bernhard | With HRTEM we determine a defect concentration of the order of 10 13/cm 2 for our samples, comparable to standard exfoliated flakes from bulk crystals. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1431 | Grain rotation and growth in binary hexagonal two-dimensional materials | Waters, Brendon; Huang, Zhi Feng | We study this dynamic process via Phase Field Crystal (PFC) modeling for 2D hexagonal materials. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1432 | Van der Waals Epitaxy of the Transition Metal Dichalcogenide WTe2 | Hauser, Kevin; Matt, Christian; Hoffman, Jason; Kang, Ruizhe; Chang, Johan; Hoffman, Jennifer | Here, we adopt a van der Waals epitaxy method [1], based on the metal-organic precursor W(CO)6, with the goal to develop a growth recipe for WTe 2 monolayer films. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1433 | Synthesis and characterization of large-area single-crystal sheets of borophene on various metal surfaces | Wu, Rongting; Gozar, Adrian; Bozovic, Ivan | Here, we report the synthesis of borophene on various single-crystal substrates and nanometer-scale thick crystallized metal films on sapphire. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1434 | In situ photo-chemical conversion of layered transition metal ditellurides | Nugera, Florence; Meng, Tepie; Afaneh, Tariq; Kapuruge, Nalaka; Xin, Yan; Gutierrez, Humberto | In this study, we synthesize large-area WTe 2 and MoTe 2 films using a simple CVD process. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1435 | Controllable Growth and Electronic Structures of 2D Transition Metal Dichalcogenides Thin Films | Zhang, Yi | Using molecular beam epitaxial (MBE) method, we achieved the controllable growth of atomically thin TMDCs MoSe 2 and WSe 2 films. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1436 | Scaling-up atomically thin coplanar semiconductor-metal circuirty via phase engineered chemical assembly | Ye, Yu | Based on that, we report on the large-scale, spatially controlled chemical assembly of the integrated 2H MoTe 2 field-effect transistors with coplanar metallic 1T′ MoTe 2 contacts via phase engineered approaches. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1437 | MOCVD Growth of High Quality Large Area WS2 Films | Campbell, William; Sundaram, Ravi; Bending, Simon | In this work, we produce continuous and uniform thin films of WS 2 via MOCVD techniques at scales up to 200mm wafer sizes. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1438 | Enabling Direct Write Mask Free Fabrication of Low Dimensional Nanoscale Architectures on Different Substrates using Aqueous Inks and CVD synthesis | Kuljanishvili, Irma; Alameri, Dheyaa; Karbach, Devon; Dong, Rui; Liu, Yuzi; Divan, Ralu | Here we present methodology for controlled selective preparation of 1D and 2D nanostructures of MoS2, WS2 and ZnO in the variety of geometric assemblies by employing parallel direct write patterning (DWP) of aqueous ink precursors on substrates at predefined locations. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1439 | Formation and self-assembly of graphene nanoribbons and nanosheets in metals | Salamanca-Riba, Lourdes; Ge, Xiaoxiao; Klingshirn, Christopher; Morales, Madeline; Rabin, Oded; Wuttig, Manfred; Cole, Daniel; Shumeyko, Christopher; Zhang, Shenjia | We use an electrocharging assisted process which consists of the application of a high DC current to a mixture of liquid metal and carbon particles to form crystalline graphitic nanoribbons in the liquid metal. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1440 | Growth of 10 × 10 cm2 single-crystal hexagonal boron nitride monolayer on the symmetry broken substrate | Wang, Li; Bai, Xuedong; Yu, Dapeng; Wang, Enge; Liu, Kaihui | The findings in this work can significantly boost the applications of 2D devices, and also pave the way for the epitaxial growth of broad non-centrosymmetric 2D materials, such as various transition metal dichalcogenides, into large-sized single crystals. | Session 94: Synthesis and Characterizations of Large Scale 2D Materials |
| 1441 | Heisenberg-Kitaev physics in magnetic fields | Vojta, Matthias; Janssen, Lukas | In this talk, I will describe the behavior of the relevant Heisenberg-Kitaev models and their extensions in applied field, with focus on field-induced exotic phases and their experimental signatures. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1442 | Emergence of a field-driven U(1) spin liquid in spin-1 Kitaev systems | Trebst, Simon; Hickey, Ciaran; Stavropoulos, Panagiotis Peter; Berke, Christoph; Kee, Hae-Young | Here we discuss the physics of the spin-1 Kitaev model in a magnetic field and show, by extensive numerical analysis, that for AFM couplings it exhibits an extended gapless U(1) quantum spin liquid at intermediate field strengths. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1443 | Ground-state phase diagram of the Kitaev-Γ model on a honeycomb lattice | Suzuki, Takafumi; Suga, Sei-ichiro | In this study, we focus on the effect of the anisotropic interaction; we connect the isolated dimer limit and the spin-chain limit by changing the coupling constants. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1444 | Large off-diagonal exchange coupling driven magnetic anisotropy and spin liquid states in the C3-symmetric iridate K2IrO3 | Ray, Rajyavardhan; Yadav, Ravi; Nishimoto, Satoshi; Richter, Manuel; Van den Brink, Jeroen | Using ab-initio techniques, we investigate the magnetic couplings in the proposed structural model for K 2IrO 3. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1445 | Chemical tuning between triangular and honeycomb structures in a 5d spin-orbit Mott insulator | Johnson, Roger; Broeders, Ineke; Mehlawat, Kavita; Li, Ying; Singh, Yogesh; Valenti, Roser; Coldea, Radu | We report structural studies of the spin-orbit Mott insulator family KxIryO2 , with triangular layers of edge-sharing IrO6 octahedra bonded by potassium ions. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1446 | Raman Scattering Investigation of a New Candidate for a Quantum Spin Liquid, the Magnetic Insulator, Ba3Ir4O10 | Sokolik, Aaron; Pellatz, Nick; Cao, Gang; Reznik, Dmitry | We will present a comparison of the results of Raman scattering experiments on Sr-doped and undoped samples of Ba 3Ir 4O 10. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1447 | Ab-Initio insight into non-local charge fluctuations in optical conductivity for α-RuCl3 through a Wannier basis: Highlighting the role of chemistry in correlated electron systems | Eichstaedt, Casey; Berlijn, Tom; Burch, Ken; Eguiluz, Adolfo | Ab-Initio insight into non-local charge fluctuations in optical conductivity for α-RuCl3 through a Wannier basis: Highlighting the role of chemistry in correlated electron systems | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1448 | New magnetic order revealed in α-RuCl3 at intermediate magnetic fields using neutron diffraction | Balz, Christian; Janssen, Lukas; Lampen-Kelley, Paula; Banerjee, Arnab; Liu, Yaohua; Yan, Jiaqiang; Mandrus, David; Vojta, Matthias; Nagler, Stephen | Here we discuss neutron diffraction data that clarifies the magnetic structure in this phase. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1449 | Phononic Structure of Kitaev Quantum Spin Liquid Candidate Material alpha-RuCl3 | Berlijn, Tom; Banerjee, Arnab; Cheng, Yongqiang; Mu, Sai | We investigate the phononic structure of alpha-RuCl3 via Density Functional Theory calculations and Inelastic Neutron Scattering experiments. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1450 | X-ray scattering studies of elementary excitations of α-RuCl3 | Lebert, Blair; Kim, Subin; Bisogni, Valentina; Jarrige, Ignace; Barbour, Andi; Alatas, Ahmet; Said, Ayman; Kim, Young-June | We investigated the Kitaeuv quantum spin liquid candidate α-RuCl 3 using resonant inelsatic x-ray scattering (RIXS) and inelastic x-ray scattering (IXS). | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1451 | Raman scattering response in the Kitaev magnet beta-Li2IrO3 and its evolution in the magnetic field | LI, Mengqun; Rousochatzakis, Ioannis; Perkins, Natalia | Here we analyze theoretically the one- and two-magnon Raman scattering intensity in the Kitaev magnet beta-Li2IrO3 and its evolution in the magnetic field. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1452 | Giant linearly-polarized photogalvanic effect and second harmonic generation in zero-plateau quantum anomalous Hall systems | Yang, Li; Fei, Ruixiang; Song, Wenshen | Combining quantum perturbation theory and first-principles simulation, we predict giant nonlinear optical responses (NLOs) in even septuple layers of MnBi 2Te 4 family materials (MBTs), which are the zero-plateau quantum anomalous Hall systems (QAHs). | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1453 | Berry Curvature Engineering by Gating Two-Dimensional Antiferromagnets | Du, Shiqiao | In this study, we find that the dual gate technology can well tune the electronic and topological properties of antiferromagnetic (AFM) even septuple-layer (SL) MnBi2Te4 thin films. | Session 95: Towards realizing Kitaev physics and other topological phases |
| 1454 | Ultrafast Dynamics in Normal and CDW States of 2H-NbSe2 | Karapetrov, Goran; Anikin, Anton; Schaller, Richard; Wiederrecht, Gary | We have performed femtosecond pump-probe reflectivity study of the carrier and lattice dynamics using near-IR pump and white broadband probe at temperatures below and above the charge density wave transition in single crystal NbSe 2. | Session 96: Superconductivity In Monolayers |
| 1455 | Two-fold anisotropic superconducting properties of few-layer NbSe2 | Heischmidt, Brett; Hamill, Alex; Tsai, Kan-Ting; Shaffer, Daniel; Zhang, Xi; Fernandes, Rafael; Wang, Ke; Pribiag, Vlad | We propose a phenomenological model to explain this unusual observation, discussing its implications to the elucidation of Ising superconductivity. | Session 96: Superconductivity In Monolayers |
| 1456 | Finite-momentum pairing in superconducting monolayer NbSe2 | Shaffer, Daniel; Kang, Jian; Burnell, Fiona; Fernandes, Rafael | Here, we study the possibility of finite-momentum pairing within a low-energy interacting microscopic electronic model for monolayer 1H-NbSe 2. | Session 96: Superconductivity In Monolayers |
| 1457 | Angle dependence of Hc2 with crossover between the orbital and paramagnetic limits in 2D NbSe2 | Matsuoka, Hideki; Nakano, Masaki; Shitaokoshi, Takashi; Ouchi, Takumi; Wang, Yue; Kashiwabara, Yuta; Yoshida, Satoshi; Ishizaka, Kyoko; Kawasaki, Masashi; Kohama, Yoshimitsu; Nojima, Tsutomu; Iwasa, Yoshihiro | In order to explain those results, we will propose a generalized Ginzburg-Landau model by taking into account the paramagnetic effect, which well describes the results with a microscopic physical picture. In this presentation, we will present the experimental data on the angle dependence of H c2 in a bilayer NbSe 2 film measured with a 55 T pulsed magnet at 3He temperature. | Session 96: Superconductivity In Monolayers |
| 1458 | Superfluid stiffness, optical spectral weight, and Tc bounds in multi-band superconductors | Verma, Nishchhal; Hazra, Tamaghna; Randeria, Mohit | Our goal is to compute the low-energy optical spectral weight and obtain tighter bounds on the superfluid stiffness, compared to the full spectral weight that includes all interband transitions. | Session 96: Superconductivity In Monolayers |
| 1459 | Proximity-induced superconducting gap in the quantum spin Hall edge state of monolayer WTe2 | Hunt, Benjamin; Lüpke, Felix; Waters, Dacen; De La Barrera, Sergio; Widom, Michael; Yan, Jiaqiang; Mandrus, David; Feenstra, Randall | In the present study, we use a novel dry-transfer flip technique to place atomically-thin layers of WTe 2 on a van der Waals superconductor, NbSe 2. | Session 96: Superconductivity In Monolayers |
| 1460 | Local magnetic measurements of few-layer superconducting MoS2 | Jarjour, Alexander; Schaefer, Brian; Ferguson, George; Lee, Menyoung; Nowack, Katja | Here, we report local magnetic measurements combined with electrical transport of this superconducting state as a function of temperature and over a limited range of carrier density. | Session 96: Superconductivity In Monolayers |
| 1461 | Superconducting properties of MBE-grown 3R-Ta1+xSe2 epitaxial thin films | Tanaka, Yuki; Matsuoka, Hideki; Nakano, Masaki; Wang, Yue; Sasakura, Sana; Kobayashi, Kaya; Iwasa, Yoshihiro | 2D materials research is one of the hot topics in condensed-matter science, but most studies are performed on nanometer-thick crystals fabricated by mechanical exfoliation. | Session 96: Superconductivity In Monolayers |
| 1462 | Type-II Ising superconductivity in two-dimensional materials with spin-orbit coupling | Wang, Chong; Lian, Biao; Guo, Xiaomi; Zhang, Zetao; Mao, Jiahao; Gu, Bing-Lin; Xu, Yong; Duan, Wenhui | In two-dimensional (2D) materials with multiple degenerate orbitals, we find that the spin-orbit coupling can induce spin-orbital locking, generate out-of-plane Zeeman-like fields displaying opposite signs for opposing orbitals, and create novel electronic states insensitive to in-plane magnetic field, which thus enables a new type of Ising superconductivity applicable to centrosymmetric materials. | Session 96: Superconductivity In Monolayers |
| 1463 | Insight into Two-Dimensional Borophene: Five-Center Bond and Phonon-Mediated Superconductivity | Gao, Zhibin; Li, Mengyang; Wang, Jian-Sheng | We report a previously unknown monolayer borophene allotrope and we call it super-B with a flat structure based on ab initio calculations. | Session 96: Superconductivity In Monolayers |
| 1464 | Atomic-layer Rashba superconductor protected by dynamic spin-momentum locking | Yoshizawa, Shunsuke; Kobayashi, Takahiro; Nakata, Yoshitaka; Yaji, Koichiro; Komori, Fumio; Shin, Shik; Sakamoto, Kazuyuki; Uchihashi, Takashi | In this talk, I will focus on crystalline atomic-layer indium on silicon surfaces with a clear spin-splitting of the Fermi surface and in-plane spin polarizations in the momentum space [2,3]. | Session 96: Superconductivity In Monolayers |
| 1465 | Kondo effect in a spinon metal | Zorko, Andrej; Gomilsek, Matjaz; Zitko, Rok; Klanjsek, Martin; Pregelj, Matej; Zhang, Qingming | Kondo effect in a spinon metal | Session 97: Kagome Lattice |
| 1466 | Dynamics of jammed spin liquid on the kagome bilayer | Zhang, Sheng; Saha, Preetha; Zhang, Depei; Lee, Seunghun; Chern, Gia-Wei | In this work, we study the dynamical properties of an effective Hamiltonian that incorporates the collinear/coplanar tendency through a biquadratic spin interaction. | Session 97: Kagome Lattice |
| 1467 | Electron-nuclear hyperfine coupling in quantum kagome antiferromagnets from first-principles calculation and a reflection of the defect effect | Zhang, Shunhong; Zhou, Yi; Liu, Feng; Liu, Zheng | Applying this method to a supercell containing Cu-Zn defects enables us to map out the variation and distribution of HFC at different nuclear sites. | Session 97: Kagome Lattice |
| 1468 | Thermal conductivity of the quantum spin liquid candidate herbertsmithite | Bourgeois-Hope, Patrick; Lefloïc, Pierre; Doiron-Leyraud, Nicolas; Taillefer, Louis; Mendels, Philippe; Velazquez, Matias | Thermal conductivity of the quantum spin liquid candidate herbertsmithite | Session 97: Kagome Lattice |
| 1469 | Diverse S=1/2 distorted kagome Hamiltonians in titanium fluorides | Jeschke, Harald; Nakano, Hiroki; Sakai, Toru | We determine the connection between highly frustrated kagome based Hamiltonians and a recently synthesized family of materials containing Ti 3+ S = 1/2 ions [1]. | Session 97: Kagome Lattice |
| 1470 | The origin of trimerized phase in S=1 kagome magnet Na2Ti3Cl8 | Paul, Arpita; Chung, Chia-Min; Changlani, Hitesh; Birol, Turan | Along with the nearest neighbor Heisenberg and biquadratic exchanges, we propose a new exchange term fourth order in spins – ring exchange that does not originate from spin-orbit coupling and involves simultaneous hopping of electrons from one site to its two neighboring sites. | Session 97: Kagome Lattice |
| 1471 | Dynamical properties of site-diluted Heisenberg antiferromagnetic on the kagome bilayer | Saha, Preetha; Zhang, Depei; Lee, Seung-Hun; Chern, Gia-Wei | We present spin dynamical simulations of the site-diluted Heisenberg antiferromagnet with nearest neighbor interactions on a quasi-2D kagome bilayer. | Session 97: Kagome Lattice |
| 1472 | Search for simplex solid and spin liquid phases in highly frustrated S=1 antiferromagnets | Changlani, Hitesh | In this talk, we show that both these criteria may be too restrictive. | Session 97: Kagome Lattice |
| 1473 | Magnetoresistance Study of Kagome Artificial Spin Ice with Fibonacci Distortions | Woods, Justin; Farmer, Barry; Wang, Yong-Lei; Kwok, Wai-Kwong; De Long, Lance | We study the effects of continuous symmetry breaking on the magnetoresistive behavior of frustrated Kagome (alt. | Session 97: Kagome Lattice |
| 1474 | Tuning the Two-step Melting of Magnetic Order in Dipolar Kagome Ice by Quantum Fluctuations | Wang, Yao; Humeniuk, Stephan; Wan, Yuan | In this talk, we show that one may tune such melting processes by quantum fluctuations. | Session 97: Kagome Lattice |
| 1475 | Non-coplanar magnetic order and topological magnons in tripod kagome antiferromagnet Yb3Mg2Sb3O14 | Dun, Zhiling; Benton, Owen; Bai, Xiaojian; Butch, Nicholas; Zhou, Haidong; Mourigal, Martin | Using elastic neutron scattering measurements, we show that one of the tripod kagome compounds, Yb 3Mg 2Sb 3O 14, orders into a strongly non-coplanar magnetic ground state below 0.88 K which calls for large antisymmetric exchanges. | Session 97: Kagome Lattice |
| 1476 | Predicting γ′-Phase Stability in Co-Based Superalloys | Oliver, Hayden; Nyshadham, Chandramouli; Bekker, Brayden; Hart, Gus | We use the Moment Tensor Potentials (MTP) active-learning framework to predict the total energy, forces, and stresses for nearly 300,000 derivative superstructures in the Co-Al-W system. | Session 98: Metals: Structural and Shape Memory |
| 1477 | Elastic properties of the Ni-containing metallic glasses. | Svitelski, Oleksiy; Duggins, Danielle; Lee, David; Suslov, Alexey | Several different acoustic techniques can be used to determine the elastic constants of a material. | Session 98: Metals: Structural and Shape Memory |
| 1478 | Undercooling of gold nanodroplets levitated in a quadrupole ion trap in high vacuum | Coppock, Joyce; Waxter, Quinn; Hannan, José; Klueter, Samuel; Reynolds, Hope; Schare, Gregory; Kane, Bruce | To establish such a measurement technique using a well-characterized material, we levitate a charged 200 nm gold nanoparticle in an AC quadrupole electric field trap in a vacuum chamber and use a 532 nm laser to illuminate and heat it. | Session 98: Metals: Structural and Shape Memory |
| 1479 | Thermodynamic theory of crystal plasticity – formulation and application to fcc copper | Lieou, Charles; Bronkhorst, Curt | We present a thermodynamic description of crystal plasticity. | Session 98: Metals: Structural and Shape Memory |
| 1480 | Ab initio studies of TiPd-M (M= Os, Ru, Co) high temperature shape memory alloys | Diale, Ramogohlo; Modiba, Rosinah; Ngoepe, Phuti; Chauke, Hasani | In order to improve its properties, the effects of partial substitution of Pd with either Os, Ru or Co were investigated using density functional theory. | Session 98: Metals: Structural and Shape Memory |
| 1481 | First-Principles Study on the Role of Doped In in Fe–Pd–In Systems | Tatetsu, Yasutomi; Matsumoto, Kenshi; Sato, Ryota; Teranishi, Toshiharu | From our analysis, we find that the distance between Fe, Pd, and In is the key factor in stabilizing the new system. | Session 98: Metals: Structural and Shape Memory |
| 1482 | Molecular Dynamics (MD) Potential Development for Carbides | McGilvry-James, Tyler; Rabbani, Muztoba; Baishnab, Nirmal; Adhikari, Puja; San, Saro; Duff, Andrew; Ching, Wai-Yim; Sakidja, Ridwan | We utilized the reference-free (RF) MEAMfit code to generate many-body potentials of Embedded Atom Method (EAM) and Modified Embedded Atom Method (MEAM) for a variety of MC (M = Transition Metals, C = Carbon) systems with an emphasis on the M23C6 and MC carbide phases. | Session 98: Metals: Structural and Shape Memory |
| 1483 | Developing the Modified Embedded Interatomic Potential for Atomistic Simulations in Ni-Ti-Hf System | Jaishi, Meghnath; Tucker, Garritt; Stebner, Aaron | Herein, we discuss the development of an optimized interatomic potential for NiTiHf system within the framework of modified embedded atom method (MEAM). | Session 98: Metals: Structural and Shape Memory |
| 1484 | Accelerating the computational design of multi-principle element alloys | Johnson, Duane; Singh, Rahul; Singh, Prashant; Sharma, Aayush; Balasubramanian, Ganesh | We present a metaheuristic hybrid Cuckoo-Search (CS) algorithm that overcomes NP-hard global optimization and produces ultrafast solutions for large-dimensional combinatorial problems, using Levy flights (global) and Monte Carlo (local) searches, which avoids local-minima traps that stagnate solutions. | Session 98: Metals: Structural and Shape Memory |
| 1485 | Ab initio typical medium theory of substitutional disorder | Oestlin, Andreas; Zhang, Yi; Terletska, Hanna; Popescu, Voicu; Byczuk, Krzysztof; Vitos, Levente; Jarrell, Mark; Vollhardt, Dieter; Beiuseanu, Florian; Chioncel, Liviu | By merging single-site typical medium theory with density functional theory we introduce a self-consistent framework for electronic structure calculations of materials with substitutional disorder which takes into account Anderson localization. | Session 98: Metals: Structural and Shape Memory |
| 1486 | Prediction of Stability, Short-range Order, and Phase Selection in Multi-Principal-Element-Alloys | Singh, Prashant; Smirnov, Andrey V.; Ray, Pratik K; Kramer, Matthew J; Picak, Sezer; Chumlyakov, Yuriy I.; Arroyave, Raymundo; Pradeep, K.G.; Karaman, Ibrahim; Johnson, Duane | We present the capabilities of KKR-CPA-based stability and short-range order (SRO) prediction in multi-component solid-solution alloys for general lattices. | Session 98: Metals: Structural and Shape Memory |
| 1487 | Synthesis of nanocrystalline Mg-based alloy powders by mechanical alloying and their microstructural characterization | Kursun, Celal; Thoma, Dan J.; Perepezko, John | Nanocrystalline Mg 65Ni 25Y 5M 5 (M= Si, B, Ag) alloys have been produced by mechanical alloying from mixtures of pure crystalline Mg, Ni, Y and M powders using a Spex Industries Mill Model 8000 in order to characterize the influence of Si, B and Ag on the microstructure of Mg-Ni-Y alloy system. | Session 98: Metals: Structural and Shape Memory |
| 1488 | Ab initio investigation of Pb-based solder replacements | Woodcox, Michael; Young, Joshua; Smeu, Manuel | In this work, we have used density functional theory (DFT) and Ab Initio Molecular Dynamics (AIMD) to model materials at temperatures below and above their melting points. | Session 98: Metals: Structural and Shape Memory |
| 1489 | The Temperature Evolution of Dislocation Dynamics in Aluminum | Dresselhaus-Cooper, Leora; Cook, Phil; Yildirim, Can; Simons, Hugh; Detlefs, Carsten; Poulsen, Henning Friis; Eggert, Jon | I extend this novel technique to time-resolved studies that measure real-time movies to visualize how dislocations evolve at thermal equilibrium. | Session 98: Metals: Structural and Shape Memory |
| 1490 | Ultra-low-power switching of IrMn/CoFeB/MgO structure with voltage-controlled spin-orbit torque | Peng, Shouzhong; Lu, Jiaqi; Li, Weixiang; Wang, Lezhi; Zhang, He; Kang, Wang; Wang, Zhaohao; Li, Xiang; Wang, Kang-Lung | Here we experimentally demonstrate the ultra-low-power and field-free switching of perpendicular magnetization by a combination of spin-orbit torque (SOT) and voltage-controlled magnetic anisotropy effect. | Session 99: Spin Textures at Magnetic Multilayers |
| 1491 | Electrical noise in magnetic tunnel junctions due to magneto-structural transitions of CoFeB/MgO interfaces | Etesamirad, Arezoo; Nelson, David; Dailey, Keanuhea; Katine, Jordan; Krivorotov, Ilya; Barsukov, Igor | Here, we study MTJ nanopillars of 50 nm diameter consisting of CoFeB free layer, MgO tunnel barrier, and CoFe based synthetic antiferromagnet. | Session 99: Spin Textures at Magnetic Multilayers |
| 1492 | Finite-size Kosterlitz-Thouless transition in Fe/W(001) ultrathin films | Venus, David; Atchison, Jordan; Bhullar, Amanjot; Norman, Bryce | We report MOKE magnetic susceptibility measurements χ(T) of 4-fold in-plane ultrathin Fe/W(001) films, where a prominent peak is observed. | Session 99: Spin Textures at Magnetic Multilayers |
| 1493 | Spin-Orbit-Torque Field-Effect Transistor (SOTFET): A New Magnetoelectric Memory | Li, Xiang; Dang, Phillip; Casamento, Joseph; Zhang, Zexuan; Afuye, Olalekan; Apsel, Alyssa; Schlom, Darrell; Jena, Debdeep; Ralph, Daniel; Xing, Huili | In this work, we propose and analyze the spin-orbit-torque field-effect transistor (SOTFET), a device with the potential to significantly boost the energy efficiency of spin-based memories, and to simultaneously offer a palette of new functionalities. | Session 99: Spin Textures at Magnetic Multilayers |
| 1494 | Pulsed or Microwave Currents Induced Random Telegraph Signal in a Magnetic Tunnel Junction | Rajapakse, Rajapaksayalage; Penthorn, Nicholas; Hao, Xiaojie; Wang, Zihui; Huai, Yiming; Jiang, HongWen | Recent work has shown creation and dynamics of magnetic skyrmions, without the Dzyaloshinskii-Moriya interaction, in the free layer of a magnetic tunnel junction (MTJ) at a temperature of 4K [1]. | Session 99: Spin Textures at Magnetic Multilayers |
| 1495 | Controlling long-range skyrmion lattices using field and temperature in Fe/Gd multilayers | DeBeer-Schmitt, Lisa; Desautels, Ryan; Tang, Nan; Montoya, Sergio; Liyanage, W; Patel, Sheena; Fitzsimmons, Michael; Fullerton, Eric; Borchers, Julie; Gilbert, Dustin | Using small angle neutron scattering (SANS), we demonstrated that once formed these dipole skyrmions are stable over a large field and temperature range including zero field and room temperature. | Session 99: Spin Textures at Magnetic Multilayers |
| 1496 | Multi-probe, laser-scanning optical microscopy for investigation of novel magnetic domain structures and boundaries | Kaczmarek, Austin; Zhao, Liuyan | In this talk, I will present our development of a spatially resolved, diffraction limited, ultrafast laser-based optical scanning microscope, which includes measurement capabilities of the magneto-optic Kerr effect (MOKE), a direct measure of broken time-reversal symmetry, and the optical second harmonic generation rotational anisotropy (SHG RA), a sensitive probe to broken spatial symmetries. | Session 99: Spin Textures at Magnetic Multilayers |
| 1497 | Chirality-driven growth of stripe domains in Co/Ni/Pt-based multilayers | Brock, Jeffrey; Medapalli, Rajasekhar; Fullerton, Eric | Here we present an experimental study of [Co(0.7 nm)/Ni(0.5 nm)/Pt(0.7 nm)] N (1 ≤ N ≤ 5) multilayers designed to have asymmetric Pt/Co and Ni/Pt interfaces and perpendicular anisotropy. | Session 99: Spin Textures at Magnetic Multilayers |
| 1498 | High tunability of synthetic antiferromagnets applied in magnetic field sensing and memory devices | Wang, Kang; Zhang, Yiou; Xiao, Gang | We investigated magnetic configurations in synthetic antiferromagnets (SAFs) of CoFeB/Ta/CoFeB by tuning interlayer exchange coupling (IEC, the energy density is denoted by J ex) and perpendicular magnetic anisotropy (PMA, K u). | Session 99: Spin Textures at Magnetic Multilayers |
| 1499 | Dynamic Skyrmion-Mediated Switching of Perpendicular MTJs: Scaling to 20 nm with Thermal Noise | Rajib, Md Mahadi; Misba, Walid Al; Bhattacharya, Dhritiman; Atulasimha, Jayasimha | Here, we will investigate the extent to which the skyrmion mediated switching scheme can scale to lateral dimensions ~ 20 nm in ferromagnets. | Session 99: Spin Textures at Magnetic Multilayers |
| 1500 | Skyrmion Breathing Modes in Synthetic Ferri- and Antiferromagnets | Lonsky, Martin; Hoffmann, Axel | Here, we present micromagnetic simulations of these excitations in synthetic ferri- and antiferromagnets. | Session 99: Spin Textures at Magnetic Multilayers |
| 1501 | Voltage Control of magnetic Skyrmions in patterned nanodots | Bhattacharya, Dhritiman; Razavi, Seyed Armin; Wu, Hao; dai, bingqian; Wang, Kang-Lung; Atulasimha, Jayasimha | Here we propose to show this behavior in patterned nanodots of CoFeB sandwiched between an oxide and a heavy metal layer. | Session 99: Spin Textures at Magnetic Multilayers |
| 1502 | A deeper understanding of the Dzyaloshinskii-Moriya interaction in magnetic multilayers | Nembach, Hans | We introduced a Cu dusting layer at the interface between CoFeB and Pt to disrupt the Heisenberg exchange directly at the interface. | Session 99: Spin Textures at Magnetic Multilayers |
| 1503 | Signature of Dispersing 1D Majorana Channels in an Iron-based superconductors | Wang, Zhenyu | Signature of Dispersing 1D Majorana Channels in an Iron-based superconductors | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1504 | Physical Properties of XTSb[(X= Eu, Sr), (T= Ag, Au)] single crystals | DEVI, Parul; Wang, Lin-Lin; Abel, Caiden; Bud’ko, Sergey; Canfield, Paul | Physical Properties of XTSb[(X= Eu, Sr), (T= Ag, Au)] single crystals | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1505 | Ab initio study of surface states in Bi4Te3 | Ashour, Omar; Li, Zhenglu; Louie, Steven | In this work, we perform ab initio density functional theory calculations of bulk and slab geometries to investigate the surface states of Bi 4Te 3. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1506 | Bond Disproportionation in the Silver Bismuthate Ag2BiO3 | Oudah, Mohamed; Kim, Minu; Rabinovich, Ksenia; McNally, Graham; Kilic, Berkay; Küster, Kathrin; Green, Robert; Foyevtsova, Kateryna; Boris, Alexander; Sawatzky, George; Schnyder, Andreas; Bonn, Douglas; Keimer, Bernhard; Takagi, Hidenori | We present an updated band structure for Ag 2BiO 3 in the Pnn2 (disproportionated) phase, where we have a band gap of 1 eV in agreement with our optical spectroscopy measurement. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1507 | Analytic calculation of generalized Brillouin zone in non-Hermitian bands | Yang, Zhesen; Zhang, Kai; Fang, Chen; Hu, Jiangping | In this talk, we introduce a systematic method to calculate the generalized Brillouin Zone (GBZ) analytically in one dimensional non-Hermitian systems. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1508 | Materials database development for electromagnetic responses | Sun, Yan; Zhang, Yang; Xu, Qiunan; Noky, Jonathan; Zelezny, Jakub; Koepernik, Klaus; Jungwirth, Tomas; Van den Brink, Jeroen; Felser, Claudia | Via high throughput numerical simulations, we developed the database for intrinsic spin Hall effect in nonmagnetic compounds, shift current in inversion symmetry Weyl semimetals, anomalous Hall effect and anomalous Nernst effect in magnetic Heusler compounds based on the known materials. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1509 | Reentrant Defect Modes in a PT-Symmetric Circuit | Stegmaier, Alexander; Helbig, Tobias; Hofmann, Tobias; Thomale, Ronny | We examine a localized zero-energy defect mode within a PT-symmetric hopping model that disappears and re-emerges at different PT phase transitions and present an exhaustive explanation for this phenomenon. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1510 | Distinct multiple fermionic states in a single topological metal | Neupane, Madhab | Using angle-resolved photoemission spectroscopy (ARPES) and first-principles electronic structure calculations, here we discuss a systematic study of the metallic ternary material discovering properties, which are unique in a single topological quantum material. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1511 | Anomalous quantum oscillations in a spin-3/2 topological semimetal: I. Experiment | Kim, Hyunsoo; Lee, Junhyun; Hodovanets, Halyna; Wang, Kefeng; Sau, Jay; Paglione, Johnpierre | In this talk, we report compelling evidence for a spin-3/2 Fermi surface in YPtBi via studies of the angle-dependent Shubnikov-de Haas (SdH) effect uniquely explained by the anisotropic effect of Zeeman interaction on spin-3/2 quasiparticles, confirming the long-awaited high-spin nature of topological semimetal RPtBi compounds. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1512 | Anomalous quantum oscillations in a spin-3/2 topological semimetal: II. Theory | Lee, Junhyun; Kim, Hyunsoo; Hodovanets, Halyna; Wang, Kefeng; Sau, Jay; Paglione, Johnpierre | In this talk, we report compelling evidence for a spin-3/2 Fermi surface in YPtBi via studies of the angle-dependent Shubnikov-de Haas (SdH) effect uniquely explained by the anisotropic effect of Zeeman interaction on spin-3/2 quasiparticles, confirming the long-awaited high-spin nature of topological semimetal RPtBi compounds. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1513 | Correspondence between winding numbers and skin modes in non-hermitian systems | Zhang, Kai; Yang, Zhesen; Fang, Chen | We establish exact relations between the winding of “energy” (eigenvalue of Hamiltonian) on the complex plane as momentum traverses the Brillouin zone with periodic boundary condition, and the presence of “skin modes” with open boundary condition in non-hermitian systems. | Session 100: Topological Materials: Majoranas and Non-Conventional Topological States |
| 1514 | Ion-ion correlations across and between micropores in carbon electrodes | Méndez-Morales, Trinidad; Salanne, Mathieu | In this work, we performed MD simulations of a common IL confined between two types of nanoporous carbons with very different features. | Session 101: Physics and effects on transport of ion-ion correlation in electrolyte materials |
| 1515 | Ion and solvent dynamics in ‘solvent-in-salt’ electrolytes | Popov, Ivan; Sacci, Robert; Sanders, Nicolette; Osti, Naresh; Mamontov, Eugene; Kobayashi, Takeshi; Pruski, Marek; Matsumoto, Ray; Thompson, Matt; Cummings, Peter; Sokolov, Alexei | In this study we analyzed ion and solvent dynamics in highly concentrated solutions in water and acetonitrile of two similar salts Li- TFSI and Li-FSI. | Session 101: Physics and effects on transport of ion-ion correlation in electrolyte materials |
| 1516 | Electroneutrality Breakdown in Nanoporous Membranes | De Souza, Pedro; Levy, Amir; Bazant, Martin | In particular, we show that in extreme 1D confinement, the screening length in a nanopore is exponentially long, approaching macroscopic length scales, and can eclipse even the length of extremely long nanotubes. | Session 101: Physics and effects on transport of ion-ion correlation in electrolyte materials |
| 1517 | Atomic Scale Characterization of the Voltage-Dependent Electrical Double Layer Structure | Harmon, Katherine; Jimenez-Angeles, Felipe; Lee, Sang Soo; Bedzyk, Michael; Olvera De La Cruz, Monica; Fenter, Paul | Several EDL models with different assumptions have been proposed, including the diffuse ion cloud of Gouy-Chapman (GC) theory and complex ion-ion correlation phenomena. | Session 101: Physics and effects on transport of ion-ion correlation in electrolyte materials |
| 1518 | Ionic liquid dynamics measured with implanted-ion β-NMR | Fujimoto, Derek; McFadden, Ryan; Dehn, Martin; Petel, Yael; Chatzichristos, Aris; Hemmingsen, Lars; Karner, Victoria; Kiefl, Robert; Levy, Philip; McKenzie, Iain; Michal, Carl; Morris, Gerald; Pearson, Matt; Szunyogh, Daniel; Ticknor, John; Stachura, Monika; MacFarlane, W | In this study, we use implanted-ion 8Li β-NMR to probe these dynamics in the IL 1-ethyl-3-methylimidazolium acetate. | Session 101: Physics and effects on transport of ion-ion correlation in electrolyte materials |
| 1519 | Fundamental Studies of Tritium Diffusivity in Irradiation Defective LiAlO2 and Li2ZrO3: A Frist Principles Density Function Theory Study | Paudel, Hari; Duan, Yuhua | Here we investigate the diffusion mechanisms of tritium and O 3H species in LiAlO 2 and Li 2ZrO 3 ceramic pellet in order to understand and quantify the effects on diffusion barriers and diffusion coefficients due to the presence of interstitial and substitutional Li defects, hydroxide (O- 3H) vacancy defect, and the interactions of 3H with O-vacancies in Li 2ZrO 3. | Session 101: Physics and effects on transport of ion-ion correlation in electrolyte materials |
| 1520 | Topological superconductivity in superconductor–semiconductor heterostructures | Lutchyn, Roman | In this talk, I will explain how to engineer topological superconductivity at the interface of a conventional (s-wave) superconductor and a semiconductor with spin-orbit interaction. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1521 | Josephson controlled topological superconductivity | Stern, Ady | In this talk I will describe how the Josephson effect may be employed to realize one dimensional topological superconductivity, with the Josephson phase difference being a "user-friendly" knob to drive the system to become topological. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1522 | Nature of the insulating and superconducting states of monolayer WTe2 | Cobden, David | We will summarize and compare these properties and assess the possibility that the insulating state has a many-body character akin to an excitonic insulator. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1523 | Phase control of zero energy modes in topological Josephson junctions | Banerjee, Abhishek; Rahman, Md. Ahnaf; Fornieri, Antonio; Whiticar, Alexander; Drachmann, Asbjorn; Lindeman, Tyler; Gronin, Sergei; Thomas, Candice; Gardner, Geoffrey; Manfra, Michael; Marcus, Charles | Here, we demonstrate strong phase control of Andreev bound states that emerge from the gap at Φ~0 and coalesce at zero energy at Φ~π. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1524 | Phase signature of topological transition in Josephson junctions | Dartiailh, Matthieu; Mayer, William; Yuan, Joseph; Wickramasinghe, Kaushini; Matos Abiague, Alex; Zutic, Igor; Shabani, Javad | On gate tunable Josephson junctions made on epitaxial Al/InAs, we observe a closing and a reopening of the superconducting gap with increasing in-plane magnetic field. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1525 | Signatures of topological superconductivity in Josephson junctions | Matos Abiague, Alex; Dartiailh, Matthieu; Mayer, William; Yuan, Joseph; Wickramasinghe, Kaushini; Zutic, Igor; Shabani, Javad | We theoretically investigate the emergence of topological superconductivity in Josephson junctions with tunable chemical potential and Rashba spin-orbit coupling, subjected to an in-plane magnetic field. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1526 | In-vacuo growth and fabrication of superconductor-semiconductor hybrid heterostructures for topological quantum computation | Pendharkar, Mihir; Lee, Joon Sue; McFadden, Anthony; Gazibegovic, Sasa; Op het Veld, Roy; dempsey, connor; Harrington, Sean; Goswami, Aranya; Seas, Michael; Choi, Sukgeun; Badawy, Ghada; Jung, Jason; Hocevar, Moira; Kouwenhoven, Leo; Lutchyn, Roman; Freedman, Michael; Frolov, Sergey; Bakkers, Erik; Palmstrom, Chris | This work reports on the Molecular Beam Epitaxy (MBE) of selective area hybrid heterostructures using various approaches with the aim of creating a versatile platform for fabrication of topological qubits in vacuo. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1527 | Accessing different topological classes and types of Majorana edge states in 1D p-wave superconductors using perturbations | Ray, Sayonee; Mukerjee, Subroto; Shah, Nayana | Here, we present the edge states of different types of p-wave SC in 1D in the presence of an additional Zeeman field and s-wave SC component. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1528 | Phase Control of Majorana Bound States in a Topological X Junction | Zhou, Tong; Dartiailh, Matthieu; Mayer, William; Han, Jong E; Matos Abiague, Alex; Shabani, Javad; Zutic, Igor | To overcome these challenges, building on recent experiments in planar Josephson junctions (JJs) [2-4], we propose a MBS platform of X-shaped JJs. | Session 102: Topological Superconductivity Induced in Spin-Orbit-Coupled Materials |
| 1529 | Complex Oxide Heterointerfaces – New Materials, Terminations, and Orientations | Rzchowski, Mark | In this talk I discuss our recent research activity in complex oxide heterostructures, addressing effects arising from spin-orbit coupling, novel spin structures, and interface modifications across a range of systems, highlighting similarities and differences. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1530 | Structural, Electronic, and Optical Properties of 2D Titanium Oxide Layers on MgO (001) | Eltinge, Stephen; Shin, Kidae; Lee, Sangjae; Jiang, Juan; Ahn, Charles; Walker, Frederick; Ismail-Beigi, Sohrab | We report on ab initio density functional theory simulations of 2D titanium oxide layers on the (001) surface of MgO. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1531 | Ab initio calculation of ionic oxidation states in metal oxides | Ismail-Beigi, Sohrab | After a brief discussion of some of the most popular approaches used for assigning electrons to atoms and their relative merits, we discuss the relation of oxidation state to the band structure, band occupancy and band symmetry in metal oxides and what is required and what it means to compute oxidation states from the band structure. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1532 | Radical-based MBE growth, chemical doping, and electronic transport in SrSnO3 films | Truttmann, Tristan; Liu, Fengdeng; Prakash, Abhinav; Yue, Jin; Mates, Thomas; Jalan, Bharat | In this talk, we present our recent study of radical-based molecular beam epitaxy (MBE) growth, and controlled doping in coherent, epitaxial n-doped SrSnO 3/GdScO 3 (001) films using La and Nd as dopants. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1533 | Electronic and Magnetic Characterization of Doped Perovskite Stannate Epitaxial Thin Films | Lindgren, Emily; Paik, Hanjong; Adamo, Carolina; N’Diaye, Alpha; Schlom, Darrell; Suzuki, Yuri | In order to incorporate spin functionality into these materials, we explore magnetic doping of the conducting perovskite stannates. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1534 | Weak Electron-Electron Interaction effects in La-doped SrSnO3 Films | Wang, Tianqi; Yue, Jin; Thoutam, Laxman; Prakash, Abhinav; Jalan, Bharat | In this talk, we present the temperature and magnetic field dependent transport study of La-doped SrSnO 3 (SSO) films. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1535 | Large Hysteretic Magnetoresistance in La-doped SrSnO3 Heterostructures: An Evidence of Magnetism? | Thoutam, Laxman Raju; Truttmann, Tristan; Rajapitamahuni, Anil; Jalan, Bharat | In this talk, we present our recent observation of a robust, hysteretic magnetoresistance (MR) in low-doped Sr 1-xLa xSnO 3 films grown on GdScO 3 (001) pc using radical-based MBE approach. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1536 | Strain Dependent Characterization of Flexible BaSnO3 Nanomembranes | Singh, Prastuti; Hong, Seung Sae; Harbola, Varun; Hwang, Harold | In this work, we will discuss our efforts to fabricate nanometer thick, freestanding La-doped BaSnO 3 film that are highly conducting and transparent using a water-soluble and lattice matched Ba 3Al 2O 6 buffer layer 1. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1537 | Structural characterization and optimization of PAMBE-grown Ga2O3 on STO (001) | Hadamek, Tobias; Dombrowski, Eric; Posadas, Agham; McCartney, Martha; Smith, David; Demkov, Alexander | Here, we report on the structural properties of Ga2O3 grown by plasma-assisted MBE on STO as a function of growth temperature. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1538 | Temperature-dependent Magnetotransport Study of Si-doped β – Ga2O3 Films | Rajapitamahuni, Anil; Thoutam, Laxman Raju; Ranga, Praneeth; Krishnamoorthy, Sriram; Jalan, Bharat | In this work, we will discuss temperature-dependent magnetotransport study of homoepitaxial Si-doped β – Ga 2O 3 (010) films grown via metal-organic vapor-phase epitaxy (MOVPE). | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1539 | Stabilizing extraordinary disorder in single crystal high entropy oxides | Zhang, Wenrui; Mazza, Alessandro; Skoropata, Elizabeth; Ward, Thomas | We demonstrate the creation of exceptionally high disorder fields in single crystal oxides. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1540 | Epitaxial Oxides on Glass: A Platform for Integrated Oxide Devices | Ortmann, John; McCartney, Martha; Posadas, Agham; Smith, David; Demkov, Alexander | Epitaxial Oxides on Glass: A Platform for Integrated Oxide Devices | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1541 | Growth and structure of Mg2TiO4 on MgO (001) | Shin, Kidae; Eltinge, Stephen; Lee, Sangjae; Shin, Hyungki; Jiang, Juan; Hong, Hawoong; Davidson, Bruce; Zou, Ke; Ismail-Beigi, Sohrab; Ahn, Charles; Walker, Frederick | Here, we report that growth of TiO2 on MgO using molecular beam epitaxy (MBE) results in formation of epitaxial Mg2TiO4. | Session 103: High Mobility, Wide Bandgap Oxides for Electronics |
| 1542 | Spatiotemporal mapping of photocurrent in 2D materials using diamond quantum sensors | Zhou, Brian | We reveal that photocurrent in monolayer MoS 2 circulates as a micron-scale vortex under an external magnetic field due to a strong photo-Nernst effect. | Session 104: Quantum Spins in Semiconductors |
| 1543 | Optically pumped spin polarization as a probe of many-body thermalization | Pagliero, Daniela; Zangara, Pablo; Henshaw, Jacob; Ajoy, Ashok; Acosta, Rodolfo; Reimer, Jeffrey; Pines, Alexander; Meriles, Carlos | Here we investigate the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. | Session 104: Quantum Spins in Semiconductors |
| 1544 | Nanoscale structure of the orbital magnetic moment of a single dopant spin in a semiconductor | Rodrigues da Cruz, Adonai; Flatté, Michael | In this project we developed a formalism employing Green’s functions obtained by the Koster-Slater technique [2] with a sp 3d 5s * empirical tight-binding Hamiltonian [3] to describe the host material. | Session 104: Quantum Spins in Semiconductors |
| 1545 | Pulsed Electrically Detected Magnetic Resonance (pEDMR) at Low Magnetic Fields using an Arbitrary Wave Form Generator (AWG) | Tennahewa, Taniya; Malissa, Hans; Popli, Henna; Atwood, Sabastian; Hosseinzadeh, Sanaz; Lupton, John; Boehme, Christoph | We use pulsed electrically detected magnetic resonance (pEDMR) in order to observe the coherent propagation of electron spins under strong drive magnetic resonance conditions in organic materials, where excitation frequencies (~100 MHz) and Zeeman fields (~3 mT) are low. | Session 104: Quantum Spins in Semiconductors |
| 1546 | Detection of electron spin resonance in the strong, non-linear drive regime using spin-dependent charge carrier recombination currents and an amplitude-modulated continuous wave electrically detected magnetic resonance scheme | Atwood, Sabastian; Nahlawi, Adnan; Hosseinzadeh, Sanaz; Tennahewa, Taniya; Popli, Henna; Malissa, Hans; Lupton, John; Boehme, Christoph | Here, we demonstrate the use of amplitude-modulated lock-in detection for the isolation of these two electric current signatures, taking advantage of their different dynamic natures. | Session 104: Quantum Spins in Semiconductors |
| 1547 | Probing spin-dependent electronic transitions in a conjugated polymer using electrically detected magnetic resonance (EDMR) under hole injection with MoO3 electrodes | Hosseinzadeh, Sanaz; Malissa, Hans; Nahlawi, Adnan; Boehme, Christoph | As spin-dependent electronic transitions rates change under magnetic resonant excitation, spin-dependent recombination can be studied using a method called electrically detected magnetic resonance spectroscopy (EDMR) [1-2]. | Session 104: Quantum Spins in Semiconductors |
| 1548 | Manipulation of Dynamic Nuclear Polarization in Gallium Arsenide under periodic optical electron spin pumping | Dominguez, Michael; Iafrate, Joseph; Sih, Vanessa | We demonstrate that the coupled electron-nuclear spin systems can be manipulated by varying the excitation energy and sweeping an external magnetic field. | Session 104: Quantum Spins in Semiconductors |
| 1549 | The impact of dynamic nuclear polarization on non-local spin valve and inverse spin Hall Hanle measurements in n-GaAs | Jiang, Zhen; Patel, Sahil; Crowell, Paul; Palmstrom, Chris | We have developed a pulsed-current technique which utilizes the vast difference between electron and nuclear spin relaxation time scales (about ns and s respectively) to eliminate the impact of the steady-state hyperfine field, and the obtained Hanle curves then match expectations based on simple drift-diffusion models. | Session 104: Quantum Spins in Semiconductors |
| 1550 | Magnetic properties of a single micrometer-sized YIG/FGT multilayer heterostructure revealed by ferromagnetic resonance | Arkook, Bassim; Alghamdi, Mohammed; Ortiz, Victor; Shi, Jing; Barsukov, Igor | The results shed light on spin phenomena at YIG/FGT interfaces and present an experimental approach for studies of micro-scale magnetic insulator/2D heterostructures. | Session 104: Quantum Spins in Semiconductors |
| 1551 | Dynamics of Spin Waves in 1D and 2D Magnonic Crystals of V[TCNE]x~2 with YIG or Cobalt | Hu, Kwangyul; Flatté, Michael | Here, we calculate and present the magnonic dispersions and linewidths of quasi one-dimensional and two-dimensional magnonic crystals consisting of V[TCNE] x~2 with YIG or cobalt. | Session 104: Quantum Spins in Semiconductors |
| 1552 | Impact of hidden structural order on low temperature magnetic resonance in V[TCNE]x | Yusuf, Huma; Franson, Andrew; Kurfman, Seth; Johnston-Halperin, Ezekiel | Here we report the observation of anomalous temperature dependent anisotropy in thin films of V[TCNE]x at temperatures down to 5 K. | Session 104: Quantum Spins in Semiconductors |
| 1553 | Evidence of Topological Hall Effect in Pt/Antiferromagnetic-Insulator Bilayers | Cheng, Yang; Yu, Sisheng; Zhu, Menglin; Hwang, Jinwoo; Yang, Fengyuan | We observe unambiguous the evidence of topological Hall effect in Pt/Cr 2O 3 bilayers grown on Al 2O 3(0001) and Al 2O 3(11-20), where Cr 2O 3 epitaxial film is an antiferromagnetic insulator. | Session 105: Transport Phenomena of Spin Textures |
| 1554 | Control of ferromagnetic Curie temperature and topological Hall effect in chromium telluride thin films | Lee, In Hak; Choi, Byoung Ki; Kim, Hyuk Jin; Kim, Min Jae; Lee, Kyeong Jun; Choi, Tae Yang; Chang, Seo Hyoung; Jeong, Hu Young; Kim, Younghak; Lee, Suyoun; Chang, Young Jun | Here, we investigate two different types of Cr 1-δTe thin films with different T c via different growth conditions to understand the origin of the various T c. | Session 105: Transport Phenomena of Spin Textures |
| 1555 | Large topological Hall effect in a non-coplanar ferromagnet Cr0.9TeB0.1 | He, Yangkun; Fecher, Gerhard; Kroder, Johannes; Fu, Chenguang; Pan, Yu; Schnelle, Walter; Borrmann, Horst; Felser, Claudia | Here, we report a sign change in AHE and the origin of THE in Cr 0.9TeB 0.1 single crystal, due to a non-coplanar canted magnetic structure and the momentum space Berry curvature. | Session 105: Transport Phenomena of Spin Textures |
| 1556 | Topological Hall effect in Shastry-Sutherland lattice | Shahzad, Munir; Swain, Nyayabanta; Sengupta, Pinaki | We study the classical Heisenberg model on the geometrically frustrated Shastry-Sutherland lattice with additional Dzyaloshinskii-Moriya (DM) interaction. | Session 105: Transport Phenomena of Spin Textures |
| 1557 | Recent Developments in Spin Superfluid Transport | Hill, Daniel; Tserkovnyak, Yaroslav | We discuss how some of these problems are actually features which lead to a rich and potentially useful non-equilibrium phase diagram. | Session 105: Transport Phenomena of Spin Textures |
| 1558 | Magnetic and electrical transport properties of MnBi2Te4 | Gong, Dongliang; Jin, Rongying | Detailed data analysis and implication will be presented. | Session 105: Transport Phenomena of Spin Textures |
| 1559 | Magnetization and transport measurement of Cr11Ge19 single crystal | Li, Yu; Young, David; Ditusa, John | Magnetization and transport measurement of Cr11Ge19 single crystal | Session 105: Transport Phenomena of Spin Textures |
| 1560 | Giant anomalous Hall effect related to scalar spin chirality induced by spin-cluster scattering | Ishizuka, Hiroaki; Nagaosa, Naoto | In this work, we discuss that the skew scattering by spin clusters shows a large skew angle in the order of 10 deg when the coupling between the electrons and the localized moments is strong. | Session 105: Transport Phenomena of Spin Textures |
| 1561 | Giant anomalous Hall effect from spin-chirality scattering in a chiral magnet | Fujishiro, Yukako; Kanazawa, Naoya; Kurihara, Ryosuke; Tsukazaki, Atsushi; Ichikawa, Masakazu; Kawasaki, Masashi; Tokunaga, Masashi; Tokura, Yoshinori | We report the observation of giant anomalous Hall effect (AHE) in MnGe thin films. | Session 105: Transport Phenomena of Spin Textures |
| 1562 | Thermal Response Functions of Insulating Magnets Near and Beyond Critical Temperature | Carnahan, Caitlin; Zhang, Yinhan; Xiao, Di | Applying linear response theory, we predict the thermal conductivities of both spin and energy, which provide insight into how thermally-induced fluctuations impact transport in magnetic systems and deepen the understanding of the general effect of fluctuations on non-trivial magnetic topology. | Session 105: Transport Phenomena of Spin Textures |
| 1563 | Anomalous Hall Effect sensor based on CoFeB with ultrahigh magnetic field detectability | Zhang, Yiou; Wang, Kang; Xiao, Gang | In this work, we have demonstrated that sensitivity of AHE sensor based on Ta/CoFeB/MgO/Ta multi-layer structure can be greatly enhanced, through engineering of magnetic anisotropy. | Session 105: Transport Phenomena of Spin Textures |
| 1564 | Atomic antiferromagnetic domain wall propagation beyond the relativistic limit | Yang, Huanhuan; Yuan, Huaiyang; Yan, Ming; Zhang, H. W.; Yan, Peng | We theoretically investigate the dynamics of atomic domain walls (DWs) in antiferromagnets driven by a spin-orbit field. | Session 105: Transport Phenomena of Spin Textures |
| 1565 | Transport signature of the BKT transition in 2D easy-plane magnets | Chung, Suk Bum; Kim, Se Kwon | In this Letter, we show here that this non-conservation of spin in the 2D easy-plane magnets leads to a distinct spin transport signature at the BKT transition, the crossover between the infinitely long-range spin transport and the exponentially decaying spin transport. | Session 105: Transport Phenomena of Spin Textures |
| 1566 | Frequency Dependence of Magnetic and Magnetoelastic Properties of Magnetostrictive Materials for Multiferroic Antennae | Finkel, Peter; Jones, Nicholas; Staruch, Margo | In this work we fully characterize magnetostrictive materials Fe 81.6Ga 18.4 and Terfenol-D at high frequencies up to several kHz and studied the effect of eddy current losses that potentially curtail the magnetic response of the material. | Session 105: Transport Phenomena of Spin Textures |
| 1567 | Topological semimetals: from classification to material realization | Cano, Jennifer | I will discuss recent developments in the field, starting with the classification of nodal fermions in both magnetic and non-magnetic space groups. | Session 106: Weyl semimetal, Theory |
| 1568 | Topological Vortices in Superconducting Time-Reversal Symmetric Weyl Semimetals | GIWA, RAUF; Hosur, Pavan | We show that sufficient conditions for a time-reversal symmetric type I Weyl semimetal (TWSM) to host Majorana modes as above when ordinary BCS superconductivity is induced in them, are (i) the TWSM forms by perturbing a Dirac or a nodal line semimetal, so that kz=0,pi planes contain pairs of opposite chirality Weyl nodes with a small k-space separation (where z is the vortex axis), and (ii) the number of quadruplets of Weyl nodes in these planes is odd. | Session 106: Weyl semimetal, Theory |
| 1569 | Finite-Size Effects in the Dynamic Conductivity and Faraday Effect of Quantum Anomalous Hall Insulators | Zeng, Junjie; Hou, Tao; Qiao, Zhenhua; Tse, Wang Kong | We theoretically study the finite-size effects in the dynamical response of a quantum anomalous Hall insulator in the disk geometry. | Session 106: Weyl semimetal, Theory |
| 1570 | Interplay of non-Abelian band topology with crystalline symmetry | Bzdusek, Tomas; Wu, QuanSheng; Soluyanov, Alexey; Bouhon, Adrien; Slager, Robert-Jan | In this talk, we first introduce the quaternion formulation of this topological invariant as obtained by Ref. | Session 106: Weyl semimetal, Theory |
| 1571 | Strain engineered higher order topological phases for spin-3/2 Luttinger fermions | Szabo, Andras; Moessner, Roderich; Roy, Bitan | We here identify a collection of cubic spin-3/2 fermions with bi-quadratic touching of Kramers degenerate valence and conduction bands as a platform to strain-engineer higher-order topological (HOT) phases: external uniaxial strain gives birth to a HOT Dirac semimetal or an insulator, depending on its sign, featuring topological \emph{hinge} modes in the strain direction. | Session 106: Weyl semimetal, Theory |
| 1572 | Wiedemann-Franz law and Mott relation for transport coefficients in the non-linear regime | Zeng, Chuanchang; Nandy, Snehasish; Taraphder, Arghya; Tewari, Sumanta | Within the framework of semiclassical Boltzmann theory, we calculate the analytical expressions for the non-linear anomalous transport coefficients, namely, the non-linear anomalous Hall, Nernst, and thermal Hall coefficients. | Session 106: Weyl semimetal, Theory |
| 1573 | Phonon induced topological phase transition in ZrTe5 | Aryal, Niraj; Jin, Xilian; Yin, Weiguo | Motivated by the aforementioned work, using first-principles calculations and effective model Hamiltonian, we study the transition from the TI regime to the Dirac and Weyl semimetallic phases induced by various phonon modes. | Session 106: Weyl semimetal, Theory |
| 1574 | Diagnosing and observing topological degeneracies in AI class systems | Zhang, Tiantian; Miao, Hu; Lu, Ling; Murakami, Shuichi; Fang, Zhong; Dean, Mark; Weng, Hongming; Fang, Chen | By combining first-principles calculations and meV-resolution inelastic x-ray scattering, we demonstrate the first realization of PT symmetry protected helical nodal lines of phonons in a real material. | Session 106: Weyl semimetal, Theory |
| 1575 | Effects of Van der Waals interaction on the phonon and electron band structures of ZrTe5 | Jin, Xilian; Aryal, Niraj; Yin, Weiguo | In this theoretical work, phonon vibration modes and the corresponding electron band structures are explored systematically without and with vdW force correction to reveal the microscopic mechanism of the phase transition in ZrTe 5. | Session 106: Weyl semimetal, Theory |
| 1576 | Bulk and surface polaritons in Weyl semimetals | Belyanin, Alexey; Chen, Qianfan; Kutayiah, Ryan; Erukhimova, Maria; Oladyshkin, Ivan; Tokman, Mikhail | We present rigorous quantum-mechanical derivation of bulk and surface conductivity tensors including both intraband and interband optical transitions and taking into account all possible combinations of bulk-to-bulk, bulk-to-surface, and surface-to-surface transitions. | Session 106: Weyl semimetal, Theory |
| 1577 | Hourglass Weyl loops in two dimensions: Theory and material realization in monolayer GaTeI family | Wu, Weikang; Jiao, Yalong; Li, Si; Sheng, Xian-Lei; yu, zhiming; Yang, Shengyuan | We present symmetry conditions for realizing such hourglass Weyl loops, which involve nonsymmorphic lattice symmetries. | Session 106: Weyl semimetal, Theory |
| 1578 | Fermionic analogue of Hawking radiation in bilayer black phosphorous | Liu, Hang; Sun, Jiatao; Huang, Huaqing; Liu, Feng; Meng, Sheng | Here we propose that the periodically driven two-dimensional black phosphorous (BP) thin film with a spatial gradient of Floquet-Dirac states can mimic the “gravity” felt by fermionic quasiparticles as that for a Schwarzschild black hole (SBH). | Session 106: Weyl semimetal, Theory |
| 1579 | Visualizing and Manipulating Bilayer Graphene Quantum Dot States | Ge, Zhehao; Joucken, Frederic; Quezada, Eberth; da Costa, Diego; Davenport, John; Giraldo, Biran; Kobayashi, Nobuhiko; Taniguchi, Takashi; Watanabe, Kenji; Low, Tony; Velasco Jr., Jairo | Here we present our latest experimental progress on directly probing and manipulating the quasi-bound states in exposed BLG QDs with a scanning tunneling microscope (STM). | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1580 | Graphene quantum dot bolometers for high frequency EPR of single molecule magnets | St. Marie, Luke; El Fatimy, A; Hruby, Jakub; Nemec, Ivan; Hunt, James; Myers-Ward, Rachael; Gaskill, David; Kruskopf, Mattias; Yang, Yanfei; Elmquist, Randolph; Marx, Raphael; van Slageren, Joris; Neugebauer, Petr; Barbara, Paola | We use these graphene quantum bolometers to perform EPR spectroscopy of single molecule magnets (SMMs). | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1581 | Manipulation of quantum geometrical properties in Weyl semimetal | Xiao, Jun; Wang, Ying; Wang, Hua; Pemmaraju, Sri Chaitanya Das; Wang, Siqi; Muscher, Philipp; Sie, Edbert Jarvis; Nyby, Clara; Devereaux, Thomas; Qian, Xiaofeng; Zhang, Xiang; Lindenberg, Aaron | Exploiting control of those materials is fascinating to achieve new functionalities and information algorithm in future quantum devices. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1582 | Quantum transport of a two-dimensional hole gas in a diamond/h-BN heterostructure | Sasama, Yosuke; Komatsu, Katsuyoshi; Moriyama, Satoshi; Imura, Masataka; Teraji, Tokuyuki; Sugiura, Shiori; Terashima, Taichi; Uji, Shinya; Watanabe, Kenji; Taniguchi, Takashi; Uchihashi, Takashi; Takahide, Yamaguchi | In this study, we fabricated a p-type diamond field-effect transistor (FET) using a diamond/hexagonal boron nitride (h-BN) heterostructure. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1583 | Electrostatically gated quantum dots in van der Waals materials | Boddison-Chouinard, Justin; Bogan, Alexander; Hawrylak, Pawel; Studenikin, Sergei; Gaudreau, Louis; Sachrajda, Andrew; Luican-Mayer, Adina | Working towards that goal, in this talk we present the design and fabrication of electrostatically gated quantum structures based on monolayer and few atomic layers of molybdenum disulfide (MoS 2) and bilayer graphene. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1584 | Transport Properties in Interacting Graphene Quantum Dots | Matusalem, Filipe; Rocha, Alexandre | In this work, we apply a combination of dynamic mean field theory [2] and a molecular-based non-equilibrium Green’s function technique coupled to DFT [3,4] to tackle the problem of interacting electrons in graphene quantum dots in AGNR including a gate electrode. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1585 | Strain-based room-temperature non-volatile MoTe2 ferroelectric phase change transistor | Wu, Stephen | In this talk, we focus on challenges in achieving dynamically controllable strain in 2D-bonded materials and how these challenges can be overcome in a scalable on-chip device. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1586 | Imaging Strain-Induced Quantum Emitters | Cavanagh, Ashley; Renaud, Dylan; Loncar, Marko; Westervelt, Robert | Our goal is to electrically characterize these strain-induced quantum emitters using the scanning probe microscope (SPM) technique described in [3]. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1587 | Spin-orbit torques in heterostructures of 2D van der Waals magnets | Gupta, Vishakha; Stiehl, Gregory; Cham, Thow Min; Mittelstaedt, Joseph; BOSE, ARNAB; Kang, Kaifei; Jiang, Shengwei; Mak, Kin Fai; Shan, Jie; Buhrman, Robert; Ralph, Daniel | We will discuss methods for quantifying the efficiency of these torques using both optical and electrical-transport techniques. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1588 | Fabrication of Hall Micromagnetometers for Probing Two-Dimensional Magnets | Nelson, Sean; Bockrath, Marc; Goldberger, Joshua; Weber, Daniel | 2 We will discuss our approach to the fabrication of such devices on top of 2D magnetic layers. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1589 | Effect of Potential Fluctuation on Ferroelectric-Gated Bilayer Graphene | Chen, Hanying; Xiao, Zhiyong; Hao, Yifei; Watanabe, Kenji; Taniguchi, Takashi; Hong, Xia | We investigated the effect of a ferroelectric gate on the transport properties of bilayer graphene (BLG). | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1590 | Improved Adhesion of Two-Dimensional Materials to Ferroelectrics from Poling | Watson, Carla; Khan, Tasneem; Pena, Tara; Wu, Stephen | We discuss a framework to enhance 2D-ferroelectric adhesion through repeated ferroelectric poling. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1591 | Control of transport properties of hybrid molybdenum disulfide (MoS2) – ferroelectric devices via domain engineering | Lipatov, Alexey; Li, Tao; Vorobeva, Nataliia; Sinitskii, Alexander; Gruverman, Alexei | We demonstrate a concept of programmable ferroelectric devices comprised of two-dimensional (2D) and ferroelectric (FE) materials, which enables precise modulation of the in-plane conductivity of a 2D channel material through nanoengineering of FE domains with out-of-plane polarization. | Session 107: Quantum and Ferroelectric Phenomena in Layered Materials |
| 1592 | Understanding Matter Under Warm and Extremely Dense Conditions | Hu, Suxing | In this talk, we will cover the recent progress in understanding the physics of matter in such extreme environments through both computational and experimental studies. | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1593 | Ultrafast electron-ion coupled dynamics of iron nano-foil in warm dense matter (WDM) conditions studies by time resolved XANES and ab-initio simulations | fernandez, Amalia; Correa, Alfredo; Hamel, Sebastien; Prendergast, David; Pemmaraju, Sri Chaitanya Das; Heimann, Philip; Falcone, Roger; Eggert, Jon; Ping, Yuan; Ogitsu, Tadashi | In this presentation, we will discuss how a combination of time-resolved XANES experiment and ab-initio derived two-temperature model coupled with XANES simulation is used to study the spatiotemporal electron-ion relaxation behavior of nano-meter thin iron foil that is exposed to femto second laser pulse. | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1594 | First-principles Stopping Power in Warm Dense Matter | Cangi, Attila; Baczewski, Andrew; Hansen, Stephanie | First-principles Stopping Power in Warm Dense Matter | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1595 | Thermoelectric properties from time-dependent density functional theory | Welden, Alicia; Andrade, Xavier; Correa, Alfredo | The goal of this work is to develop computational methods to predict electrical and thermal transport properties from ab-initio quantum simulations. | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1596 | Thermal gradient effect on the transport properties of helium and intrinsic defects in tungsten | Martinez Saez, Enrique; Maroudas, Dimitrios; Wirth, Brian | In this work, we use nonequilibrium molecular dynamics simulations to study the transport properties of He, vacancies, and SIAs in the presence of a thermal gradient in tungsten. | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1597 | Electronic structure approach to compute Dark Matter-Electron scattering cross-sections in Direct Detection experiments | Zhen, Cheng; Essig, Rouven; Fernandez Serra, Marivi | In this talk we present the theoretical model to estimate the dark matter-electron scattering event rate using first principle methods. | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1598 | Accurate Calculations of a Solid State Test Set with Quantum Monte Carlo Methods | Melton, Cody; Krogel, Jaron; Malone, Fionn; Morales, Miguel; Shulenburger, Luke | In this work, we use the recently developed correlation consistent effective core potentials and compare to previous calculations to quantify the size of the pseudopotential errors in DMC on the calculated structural properties. | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1599 | Materials Informatics for Dark Matter Detection | Geilhufe, Richard; Olsthoorn, Bart; Ferella, Alfredo; Koski, Timo; Kahlhöfer, Felix; Conrad, Jan; Balatsky, Alexander | We propose the use of informatics tools to rapidly assay materials band structures to search for small gap semiconductors and semimetals, rather than focusing on a few preselected compounds. | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1600 | Extreme Electric Fields in DFT | Ashton, Michael; Freysoldt, Christoph; Neugebauer, Joerg | Here we introduce a novel approach, which we term the Generalized Dipole Correction (GDC), that enables the direct study of ultra-high fields effecting bond-breaking and desorption at the level of single atoms using Density Functional Theory (DFT). | Session 108: Matter in Extreme Environments: Warm Dense Matter |
| 1601 | Detonation-induced transformation of graphite to hexagonal diamond. | Stavrou, Elissaios; Bagge-Hansen, Michael; Hammons, Joshua; Shaw, William; Bassett, Will; Bastea, Sorin; Lauderbach, Lisa; Hodgin, Ralph; Perez-Marty, Nicholas; Nelms, Matt; Kroonblawd, Matthew; Steele, Brad; Singh, Saransh; Sinclair, Nicholas; Li, Yuelin; Das, Pinaki; Schuman, Adam; Fezzaa, Kamel; Deriy, Alex; Bunt, Thomas; Leininger, Lara; Willey, Trevor | Here we explore the structural evolution of highly oriented pyrolytic graphite (HOPG) under detonation-induced shock conditions using in situ synchrotron X-ray diffraction in the ns time scale. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1602 | Kinetics of carbon clustering in detonation of high explosives: Particle growth along hydrodynamic streamlines | Velizhanin, Kirill | In this talk, we will discuss recent direct experimental observations of carbon cluster growth in detonation of high explosives, based on time-resolved small-angle X-ray scattering (TR-SAXS). | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1603 | Morphological evaluation of nanophase carbons recovered from deflagrated vs. detonated PBX 9502 | Firestone, Millicent; Diouf, Sokhna; Sheehe, Suzanne | Morphological evaluation of nanophase carbons recovered from deflagrated vs. detonated PBX 9502 | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1604 | Probing metastability of carbon at high pressures by predictive first-principles simulations | Williams, Ashley; Nguyen-Cong, Kien; Willman, Jonathan; Oleynik, Ivan | Previous hydrostatic studies demonstrate the stability of diamond and the absence of any other phase of carbon at pressures up to 1 TPa. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1605 | Bottom up molecular doping approach to synthesizing HPHT color centers in nanostructured diamond | Ganas, Abbie; Crane, Matthew; Beck, Ryan; Petrone, Alessio; Huang, Yue; Stroud, Rhonda; Li, Xiaosong; Pauzauskie, Peter | Our work describes a molecular approach to dope diamond nanocrystals with silicon heteroatoms at extreme temperature (>1800K) and pressure (>15 GPa) conditions using argon as a near-hydrostatic pressure medium. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1606 | Facile diamond synthesis from lower diamondoids | Park, Sulgiye; Abate, Iwnetim; Liu, Jin; Wang, Chenxu; Dahl, Jeremy; Carlson, Robert; Liuxiang, Yang; Prakapenka, Vitali; Greenberg, Eran; Devereaux, Thomas; Jia, Chunjing; Ewing, Rodney C.; Mao, Wendy; Lin, Yu | In this talk, I discuss the use of diamondoids (diamond-like hydrocarbons) as promising precursors for laser-induced high-pressure, high-temperature diamond synthesis. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1607 | First-principles phase diagram of carbon at extreme conditions | Nguyen-Cong, Kien; Belonoshko, Anatoly; Oleynik, Ivan | We present results of first-principles molecular dynamics simulations of thermodynamic properties of carbon at high temperatures and pressures, which are performed with the goal of constructing an accurate phase diagram of carbon. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1608 | Color center qubit formation by local electronic excitation | Schenkel, Thomas; Persaud, Arun; Ji, Qing; Steinke, Sven; Bin, Jianhui; Bulanov, Stepan | We report on mechanisms underlying NV-center formation with swift heavy ions, our search for rare-earth color centers in diamond and new capabilities that we are developing for color center formation far from equilibrium using intense, local pulses of ions and lasers [1-3]. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1609 | Probing the strain field and structural variation in shock-produced amorphous silicon by scanning nano-probe electron diffraction | Zhao, Shiteng; Hahn, Eric; Remington, Bruce; Ophus, Colin; Savitzky, Benjamin; Wehrenberg, Christopher; Meyers, Marc; Minor, Andrew | We use a newly developed scanning nano-probe electron diffraction technique to tackle this question. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1610 | Computer Simulations and Experimental Studies on Transition Metal Borides to 390 GPa | Vohra, Yogesh; Burrage, Kaleb; Perreault, Christopher; Samudrala, Gopi; Lin, Chia-Min; Chen, Cheng-Chien; Velisavljevic, Nenad | We will present a comparison of experimental shear strength and equation of state with the elastic constants from DFT calculations up to the highest pressure under study. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1611 | Thermal stability of silicon carbide | Wang, Yuejian | By the comparison, we found that this material is the most stable material, among the other three strong materials (diamond, moissanite, and alfa silicon nitride), in terms of the yielding under high pressure and temperature conditions. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1612 | On the strain-rate dependence of dynamic tensile strength in single and nanocrystallie SiC | Li, Wanghui; Hahn, Eric; Yao, Xiaohu; Germann, Timothy; Feng, Biao; Zhang, Xiaoqing | A quasi-isentropic loading method is used to evaluate the strain rate to over six-order from 10 7 to 10 12 s -1. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1613 | High pressure forms of aqueous carbon | Stolte, Nore; Chen, Zixin; Pan, Ding | We found that carbonic acid can be the most abundant carbon species in aqueous CO 2 solutions at ∼10 GPa and 1000 K. | Session 109: Materials in Extremes: Carbon and Related Materials at Extreme Conditions |
| 1614 | Anti-site disorder and competing magnetic ground states of Mn1-xSb2+0.67xTe4 | Liu, Yaohua; Wang, Xiaoping; Yan, Jiaqiang | To explain the results, we consider a model where the sign of the effective inter-septuple-layer coupling becomes sensitive to the Mn-defect concentration on the Sb site. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1615 | Native defects in Antiferromagnetic Topological Insulator MnBi2Te4 | Huang, Zengle; Yan, Jiaqiang; Wu, Weida | In this talk, I will present our study of the native defects in single-crystalline MnBi 2Te 4 using scanning tunneling microscopy (STM). | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1616 | Magnetism in MnBi2Te4 and related compounds | Yan, Jiaqiang; May, Andrew; McGuire, Michael; Liu, Yaohua; Sales, Brian | In this talk, I will present our work on how the stacking of septuple (MnBi 2Te 4) and quintuple (Bi 2Te 3) layers, chemical doping, high pressure, and antisite defects affect the magnetic properties. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1617 | MnBi2nTe3n+1: from intrinsic antiferromagnetic to ferromagnetic topological insulators | Ni, Ni | By reducing the interlayer magnetic exchange interaction through our rational design of the natural heterostructure consisting of the building blocks of [MnBi 2Te 4] septuple layers and [Bi 2Te 3] quintuple layers, I will show that this family of materials can be tuned from antiferromagnetic to ferromagnetic, providing a superior material platform to investigate various emergent phenomena arising from the interplay between magnetism and band topology [2,3]. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1618 | Ferromagnetic van der Waals compound MnSb1.8Bi0.2Te4 | Chen, Yangyang; Chuang, Ya-Wen; Lee, Seng Huat; Zhu, Yanglin; Honz, Kevin; Guan, Yingdong; Wang, Yu; Wang, Ke; Mao, Zhiqiang; Heikes, Colin; Quarterman, Patrick; Zajdel, Pawel; Borchers, Julie; Ratcliff, William; Zhu, Jun | In this work, we show that a Sb-rich composition MnSb 1.8Bi 0.2Te 4 exhibits a ferromagnetic ground state below a Curie temperature of 26 K, in contrast to antiferromagnetic states found in previous studies of this compound family. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1619 | Stability subtlety of layered magnetic topological insulator MnBi2Te4 | Ning, Jinliang; Zhu, Yanglin; Mao, Zhiqiang; Sun, Jianwei | As an illustration of such challenges, we investigated the metastability of a layered magnetic material MnBi2Te4, which hosts the intrinsic quantum anomalous Hall effect but the crystal itself is hard to synthesize. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1620 | Magnetic structure evolution in the Mn(Bi,Sb)2Te4 family of intrinsic magnetic topological insulators | Heikes, Colin; Quarterman, Patrick; Chen, Yangyang; Chuang, Ya-Wen; Lee, Seng Huat; Zhu, Yanglin; Honz, Kevin; Guan, Yingdong; Wang, Yu; Wang, Ke; Mao, Zhiqiang; Zhu, Jun; Zajdel, Pawel; Borchers, Julie; Ratcliff, William | We will present structural and magnetic neutron scattering measurements and other magnetic characterization of the Mn(Bi,Sb) 2Te 4 family of compounds to clarify this evolution. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1621 | Single Crystal Study of Magnetic Topological Material MnBi2xTe3x+1. | Wakefield, Joshua; Kurumaji, Takashi; Suzuki, Takehito; Checkelsky, Joseph | We discuss the anomalous Hall response in relation to the magnetic structure, and dependence of the transport properties on angle of the external magnetic field. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1622 | Crystal and magnetic structure of magnetic topological insulators MnBi2nTe3n+1 | DING, LEI; Hu, Chaowei; Ye, Feng; Feng, Erxi; Ni, Ni; Cao, Huibo | Our work may promote the theoretical predictions of exotic quantum states in the series of MnBi 2nTe 3n+1. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1623 | Large intrinsic anomalous Hall effect in hole-doped ferromagnetic phase MnSbxBi2-xTe4 | Lee, Seng Huat; Zhu, Yanglin; Min, Lujin; Katrina, Verlinde; He, Jingyang; Graf, David; Redwing, Ronald; Mao, Zhiqiang | In this talk, we will report our magnetotransport studies on MnSb xBi 2-xTe 4. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1624 | Quantum Oscillations in Intrinsic Magnetic Topological Insulator MnBi2-xSbxTe4 | Jiang, Qianni; Fei, Zaiyao; Song, Tiancheng; Yan, Jiaqiang; Malinowski, Paul; Liu, Zhaoyu; Graf, David; Xu, Xiaodong; Chu, Jiun-Haw | Here, we present Shubnikov–de Haas oscillations of both electron and hole-doped MnBi 2-xSb xTe 4 in the FM state and trace its evolution as a function of chemical doping, providing the first measurement of the band structures of MnBi 2-xSb xTe 4 in the FM state. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1625 | Optimization of the intrinsic magnetic topological insulator MnBi2Te4 and transport study | Song, Fengqi | We find that there exists an optimized MTI zone in the Mn(Sb,Bi) 2Te 4 phase diagram, which could possibly host a high-temperature QAH phase. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1626 | Magnetotransport properties in MnBi2nTe3n+1 | Hu, Chaowei; Liu, Jinyu; Mackey, Scott; Ni, Ni | In this talk, we will show our recent results on the magentotransport properties in MnBi 2nTe 3n+1, shedding light on the interplay between magnetism and band topology. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1627 | Intrinsic magnetic topological states in MnBi2Te4 family | Wang, Jing | Intrinsic magnetic topological states in MnBi2Te4 family | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1628 | Pressure-tuned interlayer coupling of the magnetic topological insulators MnBi2Te4(Bi2Te3)n (n=1,2) | Shao, Jifeng; Ma, Xiao-Ming; Li, Jingyuan; Sun, Yichen; Lu, Rui’e; Zeng, Meng; Hao, Yujie; Liu, Chang; Liu, Qihang; Zhao, Yue | Using hydrostatic pressure to further modulate the interlayer interaction, we study the transport properties of the MnBi 2Te 4(Bi 2Te 3) n (n=1,2) bulk crystals and investigate the pressure tuned interlayer coupling in detail. | Session 110: MnBi2Te4 and Related Compounds: Bulk Properties |
| 1629 | Advances in computing charge carrier dynamics in oxides from first principles | Zhou, Jin-Jian; Bernardi, Marco | This talk will discuss new approaches for treating electron-phonon coupling due to soft phonon modes, as well as a cumulant diagram-resummation approach for rigorously computing the carrier mobility in the large polaron regime. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1630 | Superconducting split-gate quantum point contacts in ionic liquid-gated SrTiO3 | Mikheev, Evgeny; Rosen, Ilan; Goldhaber-Gordon, David | In this work, we demonstrate electrostatically defined superconducting devices that combine global ionic liquid gating of the leads with local dielectric split gates. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1631 | Probing the superconductivity of ferroelectric SrTiO3 films | Schumann, Timo; Galletti, Luca; Ahadi, Kaveh; Jeong, Hanbyeol; Stemmer, Susanne | We report on the superconducting characteristics of doped 180-nm-thick SrTiO 3 films, grown by molecular beam epitaxy on (001) LSAT substrates. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1632 | Superconductivity and Antiferrodistortive Phase Transition in Sr1-xNdxTiO3 Films | Yue, Jin; Ayino, Yilikal; Navarro Gastiasoro, Maria; Persky, Eylon; Hanukov, Alex; Truttmann, Tristan; Kalisky, Beena; Fernandes, Rafael; Pribiag, Vlad; Jalan, Bharat | Through intrinsic defect management, we achieved for the first time electron density as low as 3 × 10 17 cm -3 in Sr 1-xNd xTiO 3 films with the corresponding mobility exceeding 42000 cm 2/vs at 1.8 K. By systematically varying the carrier density over three orders of magnitude, we present an important role of intra- vs. inter-band scattering on the superconducting transition temperature T c across the Lifshitz transition. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1633 | Ferroelectric Control of Normal and Superconducting States in Oxide Interface by Intrinsic and Extrinsic Bias | Tuvia, Gal; Frenkel, Yiftach; Rout, Prasanna; Silber, Itai; Kalisky, Beena; Dagan, Yoram | We suggest this effective gate bias as a way to control the initial state of a ferroelectric material. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1634 | Nonlinear transport in gate-induced 2D Rashba superconductor SrTiO3 | Itahashi, Yuki; Ideue, Toshiya; Saito, Yu; Shimizu, Sunao; Ouchi, Takumi; Nojima, Tsutomu; Iwasa, Yoshihiro | To elucidate the noncentrosymmetric nature of the Rashba superconductor, we have investigated the nonreciprocal transport in gated SrTiO 3, which is known as a 2D Rashba superconductor. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1635 | Fingerprints of interface superconductivity in ferroelectric tunnel junctions | Gallego, Fernando; Rouco, Victor; Cabero, Mariona; Sanchez Manzano, David; Tornos, Javier; El Hage, Ralph; Seurre, Kevin; Cuellar, Fabian Andres; Rivera-Calzada, Alberto; Sefrioui, Zouhair; Mompean, Federico; Garcia-Hernandez, Mar; Gonzalez-Calbet, Jose Maria; Villegas, Javier; Leon, Carlos; Santamaria, Jacobo | We have studied ferroelectric tunnel junctions with La 0.7Sr 0.3MnO 3 (LSMO) bottom electrode, a ferroelectric (FE) BaTiO 3 barrier and La 0.84Sr 0.16CuO 3-δ (LSCO) top electrode. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1636 | In Situ, Monolayer Control over the 2D Electron Gas on SrTiO3 | Yan, Xi; Wrobel, Friederike; Hong, Hawoong; Sun, Jirong; McChesney, Jessica; Zhou, Hua; Fong, Dillon | Employing in situ synchrotron X-ray methods during growth by molecular beam epitaxy (MBE) and angle-resolved photoemission spectroscopy (ARPES), we discover the existence of a 2D electron gas (2DEG) at the as-prepared, TiO 2-terminated SrTiO 3 (001) surface. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1637 | A combined experimental and first principles study of small hole polarons in YTiO3 thin films | Laraib, Iflah; Yue, Jin; Quackenbush, Nicholas; Jalan, Bharat; Janotti, Anderson | Combining experiments on hybrid molecular beam epitaxy (MBE) grown YTiO 3 heterostructures with DFT calculations we investigated the electronic and transport properties of YTiO 3. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1638 | Controlling spin-polarized carriers at the SrTiO3 /EuO interface via the ferroelectric field effect | Li, Wente; Demkov, Alexander | To investigate the ferroelectric polarization morphology, we use the phenomenological Landau-Khalatnikov model and compare it with the results of first principle calculations. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1639 | Anomalous Transverse Resistance at the Interface of (111) (La0.3Sr0.7)(Al0.65Ta0.35 )O3 /SrTiO3 Heterostructures | Krantz, Patrick; Chandrasekhar, Venkat; Huang, Zhen; Han, Kun; Ariando, Ariando; Venkatesan, Thirumalai | Here we report an anomalous transverse resistance observed in Hall bars at the interface of (111) oriented LSAT/STO. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1640 | Synthesis of epitaxial ferrimagnetic NiCo2O4 thin films on SrTiO3 and Sr3Al2O6 buffered SrTiO3 substrates | Wu, Qiuchen; Zhang, Le; Hao, Yifei; Hong, Xia | We investigated the effects of a perovskite substrate on the magnetotransport properties of NCO by depositing 30 nm NCO thin films on SrTiO 3 (STO) and Sr 3Al 2O 6 (SAO) buffered STO substrates using off-axis RF magnetron sputtering. | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1641 | Deal-Grove-like thermal oxidation of Si (001) buried under a thin layer of SrTiO3 | Guo, Wei; Posadas, Agham; Demkov, Alexander | Deal-Grove-like thermal oxidation of Si (001) buried under a thin layer of SrTiO3 | Session 111: Transport, Superconductivity in SrTiO3, and Related Thin Films and Heterostructures |
| 1642 | Advanced Josephson junctions circuits and nanoscale devices: The phase-coherence in heat transport | Giazotto, Francesco | We investigate heat exchange between two normal metal electrodes kept at different temperatures and tunnel-coupled to each other through a thermal device in the form of a DC-SQUID. | Session 112: Thermal Transport in Nanostructures |
| 1643 | Topological Quantum Thermocouple | Stafford, Charles; Jimenez Valencia, Marco Antonio | Topological Quantum Thermocouple | Session 112: Thermal Transport in Nanostructures |
| 1644 | Noise emitted by a temperature biased tunnel junction | Larocque, Samuel; Pinsolle, Edouard; Lupien, Christian; Reulet, Bertrand | In this talk we present calculations and measurements of the electrical noise in a metallic tunnel junction in presence of a thermal and voltage gradient, pushing farther our understanding of its non-equilibrium properties. | Session 112: Thermal Transport in Nanostructures |
| 1645 | Thermal Conductivity of Small Angle Twisted Bilayer Graphene | Li, Chenyang; Lake, Roger | For this range of rotation angles, we perform large-scale, non-equilibrium molecular dynamics calculations of the thermal conductivity of TBG for twist angles down to 1.89 o. | Session 112: Thermal Transport in Nanostructures |
| 1646 | Thermal Transport across hBN/Graphene Interfaces | Jaffe, Gabriel; Smith, Keenan; Watanabe, Kenji; Taniguchi, Takashi; Brar, Victor; Lagally, Max; Eriksson, Mark | We aim to provide a precise measurement of the cross plane thermal resistance of hBN flakes from the bulk-like down to the ballistic phonon transport regime and demonstrate that a variety of geometries of 3ω wires including a semicircle with 750μm diameter, measure the same cross plane thermal resistance of a 70nm thick SiO 2 film with a standard deviation of 4.7 m 2 K GW -1. | Session 112: Thermal Transport in Nanostructures |
| 1647 | Engineering ultrahigh thermal anisotropy in 2D van der Waals films | Kim, Shi En; Suh, Joonki; Rai, Akash; Mujid, Fauzia; Park, Chibeom; Ray, Ariana; Muller, David; Cahill, David; Park, Jiwoong | Previous studies have achieved thermal anisotropy through anisotropic bonding, fabricating heterostructures, and introducing low dimensional defects, giving rise to anisotropic ratios of 1-2 orders of magnitude. | Session 112: Thermal Transport in Nanostructures |
| 1648 | Phonon Localization in Ultrathin Silicon Membranes with Surface Nanostructures | Moore, Quentin; Neogi, Sanghamitra | Using direct non-equilibrium molecular dynamics (MD), we investigate the effect of periodic “nanofins” on the thermal properties of ultrathin Si membranes. | Session 112: Thermal Transport in Nanostructures |
| 1649 | Surface phonon mode remarkably limits heat conduction in a silicon ultra-thin film | Morita, Michimasa; Shiga, Takuma | Here, in order to validate the model, we performed the anharmonic lattice dynamics explicitly considering atomic structure of the film to rigorously calculate thermal conductivity and phonon transport properties of the ultra-thin silicon film. | Session 112: Thermal Transport in Nanostructures |
| 1650 | Numerical study on the transition from coherent to incoherent phonon transport in a superlattice | Ichikawa, Tatsuki; Shiga, Takuma | [2] derived the phonon coherence condition with respect to wavelength and temperature as λ≥(hv/kBT) with speed of sound (v), however, we addressed this issue from different viewpoint, namely, the uncertainty associated with energy and momentum conservations; it should be satisfied that not only the multiplication of phonon frequency ω and relaxation time τ is large enough (ωτ»1) but also fluctuation of momentum δ(hk/2π) is sufficiently smaller than reciprocal lattice vector G(=2π/a) (δ(hk/2π)«hG/2π), where a denotes periodicity. | Session 112: Thermal Transport in Nanostructures |
| 1651 | Nonequilibrium phonon distribution in current-driven nanostructures | Chen, Guanxiong; Freeman, Ryan; Zholud, Andrei; Urazhdin, Sergei | A kinetic model based on the quasi-ballistic escape approximation for the nonequilibrium phonons generated by electron scattering reproduces our main observations. | Session 112: Thermal Transport in Nanostructures |
| 1652 | New regimes of nanoscale thermal transport from nanostructured heat sources on diamond probed using coherent EUV beams | McBennett, Brendan; Knobloch, Joshua; Abad, Begoña; Frazer, Travis; Beardo, Albert; Sendra, Lluc; Camacho, Juan; Bafaluy, Javier; Chao, Weilun; Falcone, Roger; Hernández-Charpak, Jorge; Kapteyn, Henry; Alvarez, Xavier; Murnane, Margaret | We compare our results to an advanced hydrodynamic transport model to isolate the contribution of viscous resistivity directly underneath the nanoheaters to thermal transport. | Session 112: Thermal Transport in Nanostructures |
| 1653 | Nanoelectronic thermometry and refrigeration for sub-millikelvin temperatures | Prance, Jonathan; Autti, Samuli; Grigoras, Kestutis; Guénault, Anthony; Gunnarsson, David; Haley, Richard; Jones, Alexander; Pashkin, Yuri; Prunnila, Mika; Roschier, Leif; Zmeev, Dmitry | In this talk, we present our recent work to lower the operating temperature of Coulomb blockade thermometers to ≈300µK, and to improve the base electron temperature reachable by demagnetisation refrigeration of on-chip copper. | Session 112: Thermal Transport in Nanostructures |
| 1654 | Thermoelectric Transport in Topological Crystalline Insulator and Topological Semimetal Nanowires | Zhang, Shixiong | In this talk, I will present our recent experimental studies of thermoelectric transport in some representative topological materials, including SnTe-based topological crystalline insulators (TCIs) and iridium oxide-based topological semimetals (TSMs). | Session 112: Thermal Transport in Nanostructures |
| 1655 | Tunable Dimensionality Effects on the Thermoelectric Performance of Solution-Processable Hybrid Tellurium Nanowire Composites | Gordon, Madeleine; Haas, Kyle; Zaia, Edmond; Yang, Lin; Hsu, Chih-Hao; Russ, Boris; Sahu, Ayaskanta; Urban, Jeffrey | Here, we investigate the impact of ligand chain length on the physical and TE properties of tellurium nanowires (TeNWs) grown in a simple one-pot synthesis. | Session 112: Thermal Transport in Nanostructures |
| 1656 | Thermal transport in spin ladder compound Sr14Cu24O41 microstructures | Chen, Xi; Kim, Jaehyun; Sullivan, Sean; Jarvis, Karalee; Zhou, Jianshi; Shi, Li | Recently, large magnetic contribution to thermal conductivity has been observed in some cuprates with strong antiferromagnetic coupling. | Session 112: Thermal Transport in Nanostructures |
| 1657 | Probing thermal transport in single-molecule junctions | Cui, Longji | Here, by employing custom-developed scanning thermal microscopy (SThM) probes that enable picowatt-resolution, we report the quantitative measurement of the thermal conductance of single-molecule junctions and investigate the dependence of thermal transport on molecular length. | Session 112: Thermal Transport in Nanostructures |
| 1658 | Photothermoelectric detection of strain variation in gold nanostructure | Wang, Xifan; zhu, yunxuan; Evans, Charlotte; Natelson, Douglas | In this study, we report the detection of the strain variation via open circuit photothermoelectric voltage detection on thin-film Au nanowire devices as a function of the position of an optical heat source. | Session 112: Thermal Transport in Nanostructures |
| 1659 | Energy Transport in Extreme Thermal Materials | Hu, Yongjie; Kang, Joonsang; Li, Man; Wu, Huan; Nguyen, Huu Duy | In this talk, I will first describe our recent effort in developing emerging high thermal conductivity semiconductors, including boron arsenide (BAs) and boron phosphide (BP) with a room temperature thermal conductivity of 1300 W/mK ( Science 361, 575, 2018) and 500 W/mK ( Nano Letters 17, 7507, 2017) respectively, beyond most common semiconductors and metals. | Session 112: Thermal Transport in Nanostructures |
| 1660 | Super Compliant and Soft (CH3NH3)3Bi2I9 Crystals with Ultralow Thermal Conductivity | Ma, Hao; Li, Chen; Ma, Yunwei; Wang, Heng; Rouse, Zachary; Zhang, Zhuolei; Slebodnick, Carla; Alatas, Ahmet; Baker, Shefford; Urban, Jeffrey; Tian, Zhiting | In this work, we show the phonon dispersion of (CH 3NH 3) 3Bi 2I 9 single crystals at 300 K measured by inelastic x-ray scattering. | Session 112: Thermal Transport in Nanostructures |
| 1661 | Photothermoelectric detection of local strain variations in gold single-crystal and bicrystal stripes | Evans, Charlotte; Yang, Rui; Gan, Lucia; Abbasi, Mahdiyeh; Wang, Xifan; Fan, Jonathan; Natelson, Douglas | Here, we present scanning photothermoelectric measurements of gold single crystal devices and compare the photovoltages with electron back-scatter diffraction measurements, which provide insight on the local strain variation in the device. | Session 112: Thermal Transport in Nanostructures |
| 1662 | Modeling quasiballistic phonon transport from a cylindrical electron beam heat source | Wehmeyer, Geoff | Here, beam heating in nonmetallic samples is modeled by applying a general solution of the Boltzmann Transport Equation (BTE) under the relaxation time approximation [Hua and Minnich, PRB 90.21 (2014): 214306]. | Session 112: Thermal Transport in Nanostructures |
| 1663 | Nondestructive probing of the transport and elastic properties of nanostructured metalattices using coherent EUV beams | Knobloch, Joshua; Abad, Begoña; Frazer, Travis; McBennett, Brendan; Chen, Weinan; Cheng, Hiu; Grede, Alex; Nova, Nabila; Hernández-Charpak, Jorge; Mahale, Pratibha; Talreja, Disha; Xiong, Yihuang; Mallouk, Tom; Giebink, Noel; Gopalan, Venkatraman; Dabo, Ismaila; Crespi, Vincent; Badding, John; Kapteyn, Henry; Murnane, Margaret | Here we overcome this challenge by using tabletop high harmonic extreme ultraviolet (EUV) beams, with wavelengths (≈30nm) and pulse durations (≈10fs) that are well-matched for probing nanoscale structure and function. | Session 112: Thermal Transport in Nanostructures |
| 1664 | Designing Autoregulatory Nanoparticle Array and Polymer Composite Materials | Neidhart, Suzanne; Schatz, George | Designing Autoregulatory Nanoparticle Array and Polymer Composite Materials | Session 112: Thermal Transport in Nanostructures |
| 1665 | Electronic reconstruction at the interface of SrIrO3 and SrRuO3 | Nelson, Jocienne; Schreiber, Nathaniel; Georgescu, Alexandru Bogdan; Goodge, Berit; Zeledon, Cyrus; Fitting Kourkoutis, Lena; Millis, Andrew; Georges, Antoine; Schlom, Darrell; Shen, Kyle | Here we employ a combination of oxide molecular-beam epitaxy, in situ angle-resolved photoemission spectroscopy, scanning transmission electron microscopy, and density functional theory to investigate heterostructures of SrIrO 3 / SrRuO 3. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1666 | Breaking Symmetries to Create a Robust Room-Temperature Ferrimagnetic Ferroelectric in LuFeO3/CoFe2O4 Superlattices | Schlom, Darrell | In this presentation we extend this atomically engineered design methodology to LuFeO 3/CoFe 2O 4 superlattices producing a robust ground state that is simultaneously ferroelectric and ferrimagnetic at temperatures well above room temperature. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1667 | Metal-insulator transition and charge transfer in complex oxide heterostructures from DFT+DMFT | Beck, Sophie; Ederer, Claude | We study the interplay between several control mechanisms on the emerging functionalities of complex oxide thin films and heterostructures composed of different early transition metal oxides, including correlated metals, Mott insulators and band insulators, using a combination of density functional theory (DFT) and dynamical mean-field theory (DMFT). | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1668 | Long-range magnetic reconstruction of Jeff = 1/2 pseudospins in Sr2IrO4 via 5d-4d interfacial interactions with Sr2RuO4 | Souri, Maryam; Dietl, Christopher; Paerschke, Ekaterina; Calderon Ortiz, Gabriel A; Shrestha, Sujan; Hwang, Jinwoo; Cao, Gang; Kim, Jong Woo; Kim, Jung; Seo, Ambrose | We report the magnetic properties of Sr 2IrO 4 driven by 5 d-4 d interfacial interactions with Sr 2RuO 4. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1669 | Effect of Misfit Dislocation in SrIrO3 heterostructures | Wang, Zhen; Howe, David; Siwakoti, Prahald; Saghayezhian, Mohammad; Zhu, Yimei; Plummer, E; Zhang, Jiandi | By using scanning/transmission electron microscopy, we studied the structural feature of the BTO/SIO superlattices on SrTiO 3 (001) substrate. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1670 | Nanophotonic Engineering of Reconfigurable Vanadium Dioxide Phases | Schrecongost, Dustin; Xiang, Yinxiao; Zhang, Hai-Tian; Engel-Herbert, Roman; Cen, Cheng | Here we study the plasmonic properties of a room-temperature monoclinic metal phase of VO 2 and explore planar structure designs for desired optical functionalities. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1671 | Characteristic Lengths of Interlayer Charge-Transfer in Correlated Oxide Heterostructures | Omar, Ganesh Ji; Ariando, Ariando | Here, we demonstrate the effect of a crystalline LaFeO 3 buffer layer on amorphous and crystalline LaAlO 3/SrTiO 3 heterostructures with a different characteristic length of interlayer charge transfer. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1672 | Synthesis and characterization of freestanding Sr2IrO4 epitaxial thin films | Shrestha, Sujan; Souri, Maryam; Coile, Matthew; Kim, Jiwoong; Connell, John; Kim, Jong Woo; Seo, Ambrose | Synthesis and characterization of freestanding Sr2IrO4 epitaxial thin films | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1673 | Epitaxial Growth of Perovskite Vanadates | Hoffman, Jason; Hoffman, Jennifer | In this work, we use oxygen-plasma assisted molecular beam epitaxy (MBE) to deposit epitaxial LaVO 3 and SrVO 3 thin films on insulating SrTiO 3 substrates. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1674 | Metal-Insulator Transition in Strongly Correlated Quantum Confined SrVO3 Superlattices | James, Alyn; Aichhorn, Markus; Laverock, Jude | This talk will discuss our ongoing work on using the DFT+DMFT method to understand the fundamental electron correlation physics in previous experimental data of SrVO 3/SrTiO 3 superlattices. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1675 | Variable-temperature infrared microscopy of conducting oxide interfaces | Gariglio, Stefano; Luo, Weiwei; Boselli, Margherita; Poumirol, Jean-Marie; Ardizzone, Ivan; Teyssier, Jeremie; Van Der Marel, Dirk; Triscone, Jean-Marc; Kuzmenko, Alexey | Using a scattering-type scanning near field optical microscopy, we study the conducting LaAlO 3/SrTiO 3 interface from room temperature down to 6 K [1]. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1676 | Direct imaging of the internal Bloch-components of polar-skyrmions and anti-hedgehogs in oxide heterostructures | Shao, Yu-Tsun; Das, Sujit; Xu, Ruijuan; Chandrika, Swathi; Hwang, Harold; Ramesh, Ramamoorthy; Muller, David | Direct imaging of the internal Bloch-components of polar-skyrmions and anti-hedgehogs in oxide heterostructures | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1677 | Self-doping in Sr2VO4/Sr2IrO4 superlattice | Gu, Yuhao; Hu, Jiangping; Chen, Hanghui | Here we artificially design a Sr2VO4/Sr2IrO4 superlattice, composed of VO2 layer and IrO2 layer alternating along the c-axis. | Session 113: Strong Correlation, Competing Phases, and Spin-Orbit Interactions in Complex Oxide Heterostructures |
| 1678 | Application of machine learning to frustrated magnets | Samarakoon, Anjana; Tennant, David | Conventional simulation approaches struggle to deal with the need to account for multiple and competing interactions, as well as relate models and data together. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1679 | Spin dynamics in stoichiometric Ho2Ti2O7 probed by neutrons in the time domain and magnetometry in the frequency domain | Wang, Yishu; Reeder, Timothy; Kindervater, Jonas; Karaki, Yoshitomo; Maliszewskyj, Nicholas; Gladchenko, Sergiy; Koohpayeh, Seyed; Nakatsuji, Satoru; Broholm, Collin | We describe an experimental investigation of classical spin ice dynamics in a new class of high quality Ho 2Ti 2O 7 single crystals. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1680 | Frequency Dependent Susceptibiltiy Measurements of Dilute Spin Ice. | Giblin, Sean; Billington, David; Riordan, Edward; Lhotel, Elsa; Paulsen, Carley; Bramwell, Steven | We have recently demonstrated in the classical spin ice materials Dy2Ti2O7 and Ho2Ti2O7 that the magnetic relaxation below the spin freezing transition is dominated by nuclear assisted tunnelling. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1681 | Fluence Dependent Modification of Spin Ice Physics in Ho2Ti2O7 Thin Films | Barry, Kevin; Anand, Naween; Xin, Yan; Neu, Jennifer; Siegrist, Theo; Beekman, Christianne | We investigate the effects of strain, substrate orientation, and disorder on spin ice physics in Ho 2Ti 2O 7 thin films grown on yttria-stabilized-zirconia substrates via pulsed laser deposition. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1682 | Polarized Neutron Scattering as a Probe of Emergent Gauge Structure in Classical Spin Ice | Chung, Kristian; Kang, Jeremy; Jin, Wen; Lozano-Gomez, Daniel; Mukherjee, Aritro; Gingras, Michel J | In fact, within an extended model of spin ice, the NSF channel is found to be completely dispersionless, and we explore this utilizing both Monte Carlo and Large-N techniques. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1683 | Anomalous magnetic behaviour of the mixed b-site pyrochlore Dy2ScNbO7 | Rutherford, Megan; Mauws, Cole; Aczel, Adam; Beare, James; Luke, Graeme; Marjerrison, Casey; Haravifard, Sara; Zhou, Haidong; Wiebe, Christopher | To explore the response of the spin ice state to non-magnetic perturbation in dysprosium based pyrochlores, we present here a new species Dy 2ScNbO 7, which we have synthesized as both powder and single crystal. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1684 | Long-range Coulomb interactions and nonhydrodynamic behavior in thermal quenches in spin ice | Hart, Oliver; Haroche, Marianne; Castelnovo, Claudio | We find that the long-range tail of the Coulomb interactions between monopoles plays a central role by suppressing the monopole-assisted decay of noncontractible pairs with respect to monopole–antimonopole annihilation. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1685 | Peering into the darkness: vison-generated photon mass in quantum spin ice | Kwasigroch, Michal | We achieve this by studying the ring-exchange Hamiltonian of quantum spin ice in the large-s approximation, taking into account the compact nature of the emergent U(1) gauge theory. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1686 | Broadband Spectroscopy of Magnetic Monopole Noise in Artificial Spin Ice | Goryca, Mateusz; Nisoli, Cristiano; Zhang, Xiaoyu; Leighton, Chris; Li, Jing; Balk, Andrew; Schiffer, Peter; Crooker, Scott | Here we present an all-optical method to study the spontaneous magnetization fluctuations in ASIs over a broad frequency range (1 Hz – 1 MHz), which allows us to investigate magnetization dynamics through temperature- and field-dependent phase transitions. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1687 | New Vertex Type to Study Phase Transition in Artificial Spin Ices | Frotanpour, Ali | New Vertex Type to Study Phase Transition in Artificial Spin Ices | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1688 | Hall Responses in Larger Spin Quantum Magnets | Romhanyi, Judit; Penc, Karlo | We consider magnetic insulators characterized by a larger spin and therefore by spin-multipolar degrees of freedom. | Session 114: Spin Ice: Classical, Quantum, and Artificial |
| 1689 | Using Deposition Rate to Control Liquid Crystal-like Order in Vapor Deposited Organic Glasses | Bishop, Camille; Thelen, Jacob; Li, Yuhui; Gann, Eliot; Toney, Michael; Yu, Lian; DeLongchamp, Dean; Ediger, Mark | In this work, Posaconazole, a molecule with no known liquid crystal phases, is vapor-deposited to create smectic-like glasses with a high degree of orientational and positional order [Bishop et. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1690 | 2D organic layers on surfaces: self-assembly and electronic structure | Rangan, Sylvie; Bartynski, Robert | Using a combination of scanning tunnel microscopy, various electron spectroscopies techniques and ab-initio calculations, we have studied several aspects of the self-assembly and reactivity of particularly interesting model systems: Zinc tetraphenylporphyrins (ZnTPP) on single crystal surfaces. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1691 | Electric field manipulation of the molecular spin state of a Fe(II) spin crossover complex | Hao, Guanhua; Mosey, Aaron; Jiang, Xuanyuan; N’Diaye, Alpha; Zhang, Xin; Zhang, Jian; Cheng, Ruihua; Xu, Xiaoshan; Dowben, Peter | Electric field manipulation of the molecular spin state of a Fe(II) spin crossover complex | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1692 | Expanding the surface chemistry synthetic toolkit: facile carbon (sp2)-nitrogen(sp2) bond formation on Au[111] and Ag[111] | Blackwell, Raymond; Piskun, Ilya; Somoza, Joaquim; Zhao, Fangzhou; Louie, Steven; Rubio, Angel; Fischer, Felix | Here we demonstrate facile C-N bond formation on different coinage metal surfaces at substantially lower temperatures than polymerization and subsequent C-C bond formation. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1693 | Scanning Tunneling Microscopy and Spectroscopy of Heterotriangulene-based 2D Polymers | Enderson, Zachery; Murali, Harshavardhan; Dasari, Raghunath; Parker, Timothy; Marder, Seth; Li, Hong; Dai, Qingqing; Thomas, Simil; Bredas, Jean-Luc; First, Phillip | Using an LT-STM, we present new information on the bridge configuration of the demethylated structure, on the electronic structure of the DTPA COF in its closed-shell (methylated) and “radical” (demethylated) forms, and on the interaction between the COF and substrate. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1694 | Enhancement of Magnetoelectric Coupling in Ferroelectric Vinylidene Fluoride/Ferroelectric Cobalt by insertion of a dielectric layer of Magnesium Oxide. | Subedi, Aashish; Foreman, Keith; Adenwalla, Shireen | We studied magnetoelectric coupling in these heterostructures, with VDF deposited directly on Co without breaking vacuum. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1695 | Electric Field Control of Molecular Charge State in a Single-Component 2D Organic Nanoarray | Schiffrin, Agustin; Kumar, Dhaneesh; Yin, Yuefeng; Medhekar, Nikhil; Krull, Cornelius | Here, we report the self-assembly of 9, 10-dicyanoanthracene (DCA) molecules on Ag(111) into periodic 2D arrays, where the molecular charge state (neutral or negative) can be altered – individually and depending on the adsorption site – by the local electric field of a scanning tunneling microscope tip. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1696 | Low Energy Electron Interactions with Aliphatic and Aromatic Self-assembled Monolayers on Au(111) | Ventrice, Carl; Grzeskowiak, Jodi | Low Energy Electron Interactions with Aliphatic and Aromatic Self-assembled Monolayers on Au(111) | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1697 | Interface properties of FePc adsorbed on Ag (100) with and without NaCl monolayer M. Jabrane 1,2, M.Y. El Hafidi1 , M. El Hafidi1 , A. Kara2 1 Laboratoire de la physique la matière condensée, Faculty of Sciences Ben M’Sik, Hassan II University | Jabrane, Meysoun | In this work, we tackle a full comparison of the geometric, magnetic and electronic properties of FePc/Ag(100) with and without an insulator. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1698 | Electric-field assisted nucleation processes of croconic acid films | Yuan, Yifan; Jiang, Xuanyuan; Poddar, Shashi; Xu, Xiaoshan | To address this issue, we have studied the effect of electric field and temperature on the growth dynamics, especially the heterogeneous nucleation process, of croconic acid (CA) films, taking advantage of the large dipole of the molecules and the ferroelectric polarization of the molecular crystals. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1699 | Ultra-low switching Energy Organic Memories | Venkatesan, Thirumalai; Goswami, Sreetosh; Goswami, Sreebrata | Ultra-low switching Energy Organic Memories | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1700 | Computational Raman spectroscopy for organic adsorbates on graphene | Zayak, Alexey; Afroosheh, Sajjad | This talk will report about simulations of surface-enhanced Raman spectra along with the supporting electronic structure analysis, focusing on the interfacial charge transfer and electron-phonon coupling. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1701 | Comparitive STM and LEED study of the self-assembly of theobromine on Au(111) and few layer graphene on SiC(0001) | Baltaci, Ismail; Schulte, Malte; Westphal, Carsten | Here we present the first experimental results of the xanthine derivate theobromine weakly bonded to graphene and to Au(111) at room temperature. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1702 | Detecting Stable Surface Adsorbates with Bayesian Optimization | Järvi, Jari; Todorovic, Milica; Rinke, Patrick | We combine DFT with artificial intelligence (AI) for global atomistic structure search of stable adsorbates. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1703 | Unusual self-assembly of chloroaluminium phthalocyanine on graphite | Ma, Haiyang; Jia, Jinfeng; Zhang, Ruiqin | We report an unusual self-assembled layer structure of chloroaluminium phthalocyanine (ClAlPc) molecules on highly ordered pyrolytic graphite (HOPG), in which a close-packed well-ordered monolayer is separated from the substrate by a relatively disordered buffer layer, as revealed using scanning tunneling microscopy (STM). | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1704 | Coherent X-ray measurement of local step-flow propagation during growth on polycrystalline organic semiconductor thin film surfaces | Headrick, Randall; Ulbrandt, Jeffrey; Myint, Peco; Wan, Jing; Li, Yang; Fluerasu, Andrei; Zhang, Yugang; Wiegart, Lutz; Ludwig, Karl | This work shows that the use of coherent X-ray scattering provides an approach to better understand surface dynamics and fluctuations during crystal growth. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1705 | Realizing nearly-free-electron like conduction band in a molecular film through mediating intermolecular van der Waals interactions | Feng, Min | To enhance intermolecular electronic hybridization, we introduce a method to mediate the vdW interactions between C 60 molecules through a substrate control of intermolecular interactions. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1706 | Predicting χ of polymer blends using atomistic "morphing" simulations | Shetty, Shreya; Gomez, Enrique; Milner, Scott | In this work, we use united-atom MD simulations and the morphing method to calculate χ for real polymer blends: (1) poly(ethylene) – poly(ethylene oxide), (2) poly(styrene) – poly(2-vinyl pyridine), (3) poly(isoprene) – saturated (polyisoprene) and (4) poly(styrene) – poly(α-methyl styrene). | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1707 | Visualizing Molecular Orientational Ordering and Electronic Structure in CsnC60 thin films | Han, Sha; Guan, Mengxue; Song, CanLi; Wang, Yilin; Ren, Mingqiang; Meng, Sheng; Ma, Xucun; Xue, Qikun | By varying the discrete charge states and film thicknesses, we reveal a large tunability of orientational ordering of C 60 n- anions, yet the tunneling conductance spectra are robustly characteristic of energy gaps, hallmarks of the Jahn-Teller distortions and electron correlations. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1708 | Facet Specific Adsorption as a Route to Remediation of Chlorinated Organic Contaminants | guo, hao; Gerstein, Emily; Jha, Kshitij; Tsige, Mesfin | We report the behavior of two common chlorinated organic contaminants, trichloroethylene (TCE) and 1,3,5-trichlorobenzene (TCB), on three facets of Pd in terms of their adsorption, structural organization. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1709 | Evidence for an accumulation layer at the donor-acceptor interface in organic solar cells | Zhu, Xinrui; McGahan, Christina; Arango, Alexi; Aidala, Katherine | Here we present bulk electrical measurements on bilayer transistors, along with scanning Kelvin probe force microscopy capable of measuring band bending and density of states. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1710 | Controlling energy level alignment at a chromophore/TiO2 interface using a co-adsorbed helical peptide | Viereck, Jonathan; Chen, Yuan; Harmer, Ryan; Galoppini, Elena; Rangan, Sylvie; Bartynski, Robert | Here, we present a novel and versatile approach of controlling this energy alignment via a “mixed-layer” solution sensitization process, where a monolayer of a dipole containing helical peptide is prepared on a single crystal TiO 2(110) surface and successively exposed to a solution of a Zinc Tetraphenylporphyrin (ZnTPP) derivative. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1711 | Investigating the monolayer structure of caffeine molecules on Au(111) | Schulte, Malte; Jeindl, Andreas; Baltaci, Ismail; Schmitz, Marie; Roese, Peter; Berges, Ulf; Hofmann, Oliver T.; Westphal, Carsten | In this work we analyzed the structure formation of caffeine molecules on Au(111) by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), x-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculations. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1712 | Spiropyran/Merocyanine adsorption on a Gold Surface | Riemann, Andreas; Browning, Lucas; Goff, Hunter; Tate, Nelson | The adsorption behavior of a specific molecule, namely naphtho-merocyanine on an Au(111) substrate has been investigated using Scanning Tunneling Microscopy (STM) and computational chemistry methods. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1713 | Investigating Electronic structure at Nano-Bio Interface to optimize Excitonic Solar cell architecture | Das, Subhabrata; Yu, Xiaojiang; cao, liang; Patra, Abhirup; Gao, Xingyu; Breese, Mark; SOMASUNDARAN, Ponisseril; Song, Zhaoning; Barbiellini, Bernardo; Renugopalakrishnan, Venkatesan | We discussed how to compensate the charge offset, to restore the Valence Band and XPS of C1s while mapping the occupied and unoccupied states around both sides of the Fermi level. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1714 | Light-induced molecular dipole reordering in halide perovskites | Chiu, Ya-Ping; Hsu, Hung-Chang; Huang, Bo-Chao; Chin, Shu-Cheng; Hsing, Cheng-Rong; Nguyen, Duc-Long; Schnedler, Michael; Sankar, Raman; E. Dunin-Borkowski, Rafal; Wei, Ching-Ming; Chen, Chun-Wei; Ebert, Philipp | In this work, we utilized light-illuminated cross-sectional scanning tunneling spectroscopy to map simultaneously the organic cation’s dipole orientation and the corresponding electrostatic potential with atomic resolution. | Session 115: Focus Topic: Surface, Interface, and Thin Film Science of Organic Molecular Solids |
| 1715 | Topological Surface States of Cadmium Arsenide Thin Films | Galletti, Luca; Kealhofer, David; Schumann, Timo; Goyal, Manik; Rezaie, Salva; Stemmer, Susanne | We compare quantum transport in films of varying thickness at apparently identical gate-tuned carrier concentrations and find no clear dependence of the relative phase of the quantum oscillations on the sample thickness 3. | Session 116: Weyl semimetal, Transport |
| 1716 | Large Thermal Hall effect observed in Bi89Sb12 topological insulator and Weyl Semimetal | Vu, Dung; Trivedi, Nandini; Heremans, Joseph P | We will present the field dependence of the sample’s transport properties including thermopower, Nernst thermopower, Hall and electrical resistivity, and thermal conductivity, and discuss possible connections of this large thermal Hall effect to conveyor-belt entropy transport mediated by topologically protected Fermi arc surface states in Weyl semimetals [2]. | Session 116: Weyl semimetal, Transport |
| 1717 | Spin Zero Effect in Dirac Semimetal ZrTe5 | Wang, Jingyue; Niu, Jingjing; Yan, Baoming; Li, Xinqi; Bi, Ran; Yao, Yuan; Yu, Dapeng; Wu, Xiaosong | We study the angular dependence of the oscillations in a Dirac material ZrTe 5 and observe a striking spin zero effect, i.e., vanishing oscillations accompanied with a phase inversion. | Session 116: Weyl semimetal, Transport |
| 1718 | Electric modulation of the Fermi arc spin polarization of a Dirac semimetal nanowire | Lin, Benchuan; Wang, Shuo; Wang, Anqi; Xia, Ke; Yu, Dapeng; Liao, Zhi-Min | Here we report the direct access of the Fermi arc spin polarization through the electromagnetic transport experiment. | Session 116: Weyl semimetal, Transport |
| 1719 | Large in-plane Hall/Nernst effect generated by Berry curvature in Weyl semimetallic phase of indium doped Pb1-xSnxTe | Zhang, Chenglong; Liang, Tian; Tokura, Yoshinori | Large in-plane Hall/Nernst effect generated by Berry curvature in Weyl semimetallic phase of indium doped Pb1-xSnxTe | Session 116: Weyl semimetal, Transport |
| 1720 | Magnetic electron lensing in the 3D Dirac semi-metal Cd3As2 | Huang, Xiangwei; Putzke, Carsten; Guo, Chunyu; Diaz, Jonas; Koenig, Markus; Borrmann, Horst; Nair, Nityan; Analytis, James; Moll, Philip | We demonstrate the controlled generation of tightly focused electron beams in a new class of microdevices machined from crystals of the Dirac semi-metal Cd 3As 2. | Session 116: Weyl semimetal, Transport |
| 1721 | Higher harmonics of quantum oscillations uncover Dirac Fermons in LaRhIn5 | Alexandradinata, Aris; Guo, Chunyu; Putzke, Carsten; Fan, Fengren; Zhang, Shengnan; Wu, QuanSheng; Yazyev, Oleg; Shirer, Kent; Bachmann, Maja; Bauer, Eric; Ronning, Filip; Felser, Claudia; Sun, Yan; Moll, Philip | Here, we overcome these shortcomings and demonstrate how to rigorously identify three-dimensional Dirac fermions from the higher harmonics of quantum oscillations. | Session 116: Weyl semimetal, Transport |
| 1722 | α-Sn Magnetotransport Devices | Vail, Owen; Chang, Yu hao; Harrington, Sean; Folkes, Patrick; Taylor, Patrick; nichols, barbara; De Coster, George; Palmstrom, Chris | After verifying epitaxial growth of our films, we perform transport measurements to characterize the electronic carriers in the material. | Session 116: Weyl semimetal, Transport |
| 1723 | Electric field gating of cadmium arsenide films using hexagonal boron nitride | Datta, Biswajit; Galletti, Luca; Saito, Yu; Kealhofer, David; Goyal, Manik; Shoron, Omor; Young, Andrea; Stemmer, Susanne | To address this problem, here we report on the use of hexagonal boron nitride (hBN) towards high-quality Cd 3As 2 devices. | Session 116: Weyl semimetal, Transport |
| 1724 | Observation of an Unconventional Anomalous Hall Effect in a New Ferromagnetic Weyl Semimetal CeAlSi | Yang, Hung-Yu; Singh, Bahadur; Gaudet, Jonathan; Lu, Baozhu; Huang, Cheng-Yi; Chiu, Wei-Chi; Huang, Shin-Ming; Wang, Baokai; Bahrami, Faranak; Graf, David; Xu, Guangyong; Lin, Hsin; Torchinsky, Darius; Broholm, Collin; Bansil, Arun; Tafti, Fazel | In the new ferromagnetic Weyl semimetal (FM WSM) CeAlSi, we find both a conventional and an unconventional anomalous Hall effect (AHE), that we name the loop Hall effect (LHE). | Session 116: Weyl semimetal, Transport |
| 1725 | Sliding-layer structural phase transitions in the topological semimetal MoTe2 | Schneeloch, John; Tao, Yu; Duan, Chunruo; Yang, Junjie; Dissanayake, Sachith; Ye, Feng; Aczel, Adam; Fernandez-Baca, Jaime; Xu, Guangyong; Matsuda, Masaaki; Louca, Despina | A multitude of ways of influencing these transitions are known; we will discuss how both W-substitution and pressure drive the transition toward a simpler phase coexistence behavior, though with opposite effects on transition temperature or the 1T’ β angle. | Session 116: Weyl semimetal, Transport |
| 1726 | Quantitative analysis of chiral anomaly induced negative magnetoresistance in nodal-line semimetal SrAs3 | Zhao, Minhao; Xiu, Faxian | Under 31.5 T, we observed the process from NMR appeared to saturated. | Session 116: Weyl semimetal, Transport |
| 1727 | Observation of a Thermoelectric Hall Plateau in the Extreme Quantum Limit | Zhang, Wenjie; Wang, Peipei; Skinner, Brian; Bi, Ran; Kozii, Vladyslav; Cho, Chang-woo; Zhong, Ruidan; Schneeloch, John; Yu, Dapeng; Gu, Genda; Fu, Liang; Wu, Xiaosong; Zhang, Liyuan | Here we demonstrate that the thermoelectric Hall conductivity α xy in the three-dimensional Dirac semimetal ZrTe 5 acquires a robust plateau in the extreme quantum limit of magnetic field. | Session 116: Weyl semimetal, Transport |
| 1728 | Spin Relaxation Times of Copper Phthalocyanine (CuPc) Qubits diluted in Diamagnetic Zinc Phthalocyanine (ZnPc) Host Matrices | Merrill, Chandler; Popli, Henna; Malissa, Hans; Stolley, Ryan; Miller, Joel; Vardeny, Valy; Boehme, Christoph | We report on electron paramagnetic resonance (EPR) measurements of powder CuPc prepared in a solid-state complex, ZnPc. | Session 117: Nanomaterial Interactions and Applications |
| 1729 | First Principles Studies of the Structural Evolution of a Dicyanobenzene Molecular Junction with Gold Electrodes | Li, Mo; Young, Joshua; Smeu, Manuel | We present our first principles studies of the structural and electronic properties of a single-molecule dicyanobenzene junction with gold electrodes. | Session 117: Nanomaterial Interactions and Applications |
| 1730 | Scanning tunneling microscopy study of atomistic energy level engineering in donor-acceptor molecules | Nguyen, Giang; Tom, Gary; Tonge, Christopher; Hudson, Zachary; Burke, Sarah | Here we present atomistic energy level engineering in N-heterotriangulence derivatives functionalized with different acceptor units. | Session 117: Nanomaterial Interactions and Applications |
| 1731 | Temperature and Pressure Dependent Properties of A3Ti2O7 | Liu, Sizhan; Stavitski, Eli; Liu, Zhenxian; Wang, SuYin; Chen, Yu-Sheng; Gao, Bin; Kim, Jaewook; Cheong, Sang-Wook; Ghose, Sanjit; Tyson, Trevor | In this work, a structural study over a broad range of temperatures and pressures has been conducted by x-ray diffraction, Raman spectroscopy, x-ray absorption spectroscopy, x-ray pair distribution function measurements and DFT modeling. | Session 117: Nanomaterial Interactions and Applications |
| 1732 | Characterizing Cellulose Crystallographic Texture in Plant Cell Walls Using Grazing Incidence X-ray Scattering | Rongpipi, Sintu; Ye, Dan; Barnes, William; Kiemle, Sarah; Woll, Arthur; Zhu, Chenhui; Anderson, Charles; Cosgrove, Daniel; Gomez, Esther; Gomez, Enrique | We studied the structure of cellulose in plant primary cell walls through grazing incidence wide angle X-ray scattering (GIWAXS). | Session 117: Nanomaterial Interactions and Applications |
| 1733 | Redesign and Develop Effective Liposomal Formulation for Prodrug Delivery Through Synchrotron X-ray Studies of Molecular Interactions | Pham, Tiep; Leon-Plata, Paola; Zhang, Pin; Liu, Chang; Bu, Wei; Lin, Binhua; Liu, Ying | In this study, we synthesized a capecitabine analogue by conjugating a carbon chain of cetyl chloroformate with 5- fluorouracil (5FU) (5FU-PAL). | Session 117: Nanomaterial Interactions and Applications |
| 1734 | Long-Term Performance Prediction of Mixed Matrix Membranes at Different Adsorbent Dose and Operating Conditions | Mondal, Raka | A two-dimensional transient model was developed using equations of continuity, motion and convective-diffusive-adsorption based solute transport. | Session 117: Nanomaterial Interactions and Applications |
| 1735 | Time-dependent mechanical response of ice adhesion on metal substrates | Machado de Oliveira, Marina; Murphy, Joseph; Rice, WIlliam; Ackerman, John; Alvarado, Vladimir | To shed light on these initial findings, we performed time-dependent stress ramps from -20 to -7 oC to determine the dynamical stress relaxation mechanism. | Session 117: Nanomaterial Interactions and Applications |
| 1736 | Electrical Measurement of Water Assisted Ion Desorption and Solvation on Isolated Carbon Nanotubes | Edwards, Patrick; Wang, Bo; Cronin, Steve; Bushmaker, Adam | We will present an investigation on the mean residence time of gaseous ions adsorbed on the surface CNT-FETs with and without native surface water layers that exist in atmospheric conditions. | Session 117: Nanomaterial Interactions and Applications |
| 1737 | Enhancing Superionic Conductivity in Cluster-Based Sodium-Rich Antiperovskites | Fang, Hong; Jena, Purusottam | In this work, we aim to further enhance the ionic conductivity of the Na-superionic conductor by using chemical mixing according to the size effect. | Session 117: Nanomaterial Interactions and Applications |
| 1738 | Absorption spectra and density of states of cubic Frenkel exciton system with Gaussian diagonal disorder | Boukahil, Abdelkrim; Zettili, Nouredine | We used the coherent potential approximation to investigate the density of states and the optical absorption of Frenkel exciton systems in cubic lattices with nearest neighbor interactions and a Gaussian diagonal disorder. | Session 117: Nanomaterial Interactions and Applications |
| 1739 | Flexible bimodal photoemission electron source based on Au-coated fiber optic nanotips | Keramati, Sam; Passian, Ali; Khullar, Vineet; Beck, Joshua; Uiterwaal, Cornelis; Batelaan, Herman | Our theoretical analysis followed by detailed experiments at a range of visible wavelengths confirm that the observed nonlinear electron emission is assisted by surface plasmon excitation in the metallized fiber taper. | Session 117: Nanomaterial Interactions and Applications |
| 1740 | INVESTIGATION OF MULTICOLORED AND WHITE LIGHT EMISSION FROM IR-EXCITED NANO-PARTICLES | Ma, Lidong; Di Bartolo, Baldassare | The aim of this research is both theoretical and experimental: theoretical for I will try to uncover the mechanism of the WL production and experimental for the possible application as efficient light sources of systems similar to the ones that we will investigate (oxide nano-powders doped with lanthanide or transition metal ions). | Session 117: Nanomaterial Interactions and Applications |
| 1741 | On-and-off chip magnetic cooling for semiconductor nanostructures below 1 mK | Zumbuhl, Dominik; Samani, Mohammad | We are exploring methods which are insensitive to charge-noise and employ these as integrated on-chip microkelvin thermometers. | Session 117: Nanomaterial Interactions and Applications |
| 1742 | A realistic dimension-independent approach for charged defect calculations in semiconductors | Deng, Hui-Xiong; Luo, Jun-Wei; Wei, Suhuai | In this presentation, we propose a physical, straightforward, and dimension-independent universal model to calculate the formation energies of charged defects in both three-dimensional (3D) bulk and low-dimensional semiconductors. | Session 117: Nanomaterial Interactions and Applications |
| 1743 | Reorientation of antiferromagnetism in Co-doped FeSn and its implications for Dirac electron states | Meier, William; Yan, Jiaqiang; McGuire, Michael; Wang, Xiaoping; Christianson, Andrew; Sales, Brian | I will present magnetization measurements of single crystals of (Fe 1-xCo x)Sn revealing the evolution and suppression of this magnetic order with Co substitution. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1744 | Above-room-temperature ferromagnetic state in a proximitized topological Dirac semimetal | Uchida, Masaki; Koretsume, Takashi; Sato, Shin; Kriener, Markus; Nakazawa, Yusuke; Nishihaya, Shinichi; Taguchi, Yasujiro; Arita, Ryotaro; Kawasaki, Masashi | We report an above-room-temperature ferromagnetic state realized in a proximitized Dirac semimetal, which is fabricated by growing typical Dirac semimetal Cd 3As 2 films on a ferromagnetic garnet with strong perpendicular magnetization. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1745 | Interplay of magnetic frustration and topology in complex metals | Analytis, James; Lachman, Ella; McDonald, Ross; Maniv, Eran | We study how signatures of topological transport properties can be affected by complex magnetic textures in Kagome and triangular lattice materials. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1746 | Introducing ferromagnetism into Dirac semimetal Cd3As2 thin films | Xiao, Run; Mitra, Arpita; Yanez, Wilson; Held, Jacob; Tomczyk, Michelle; Zhang, Fan; Fang, Yawen; Mkhoyan, K.; Ramshaw, Brad; Samarth, Nitin | Here, we attempt to introduce Mn into Cd 3As 2 thin films grown by molecular beam epitaxy on GaAs (111)B substrates with a GaSb buffer layer. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1747 | Tunable Berry Curvature Effects Through Volume-wise Magnetic Competition in a Topological Kagome Magnet Co3Sn2S2 | Guguchia, Zurab; Verezhak, Joel; Gawryluk, Dariusz; Tsirkin, Stepan; Yin, Jiaxin; Belopolski, Ilya; Zhou, Huibin; Simutis, Gediminas; Zhang, Songtian; Cochran, Tyler; Chang, Guoqing; Pomjakushina, Ekaterina; Keller, Lukas; Skrzeczkowska, Zuzanna; Wang, Qi; Lei, Hechang; Khasanov, Rustem; Amato, Alex; Jia, Shuang; Neupert, Titus; Luetkens, Hubertus; Hasan, Zahid | Using muon spin-rotation, we present evidence for competing magnetic orders in the kagome lattice of this compound. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1748 | Observation of an edge supercurrent in Weyl semimetal MoTe2 | Wang, Wudi; Kim, Stephan; Liu, Minhao; Cevallos, F.; Cava, Robert; Ong, N. Phuan | We describe the edge condensate with a Ginzburg Landau wave function that is independent from the bulk condensate. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1749 | Magnetic Weyl Semimetals | Felser, Claudia; Sun, Yan; Manna, Kaustuv | Magnetic Weyl Semimetals | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1750 | Electronic, magnetic and thermodynamic properties of the Kagome layer metal FeSn | Sales, Brian; Yan, Jiaqiang; Meier, William; Zheng, Qiang; Christianson, Andrew; Okamoto, Satoshi; McGuire, Michael | Electronic, magnetic and thermodynamic properties of the Kagome layer metal FeSn | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1751 | Low temperature investigation of candidate type-II Weyl semimetal LaAlGe | Zic, Mark; Eckberg, Chris; Hodovanets, Halyna; Bae, Seokjin; Kim, Hyunsoo; Metz, Tristin; Winters, Sean; Kraft, Daniel; Anlage, Steven; Paglione, Johnpierre | We use a molten flux growth technique to precipitate pristine LaAlGe single crystals that crystalize in the non-centrosymmetric crystal structure required for Weyl points to exist. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1752 | Magnetostructural instability in Weyl ferromagnet Mn3ZnC | Teicher, Samuel; Svenningsson, Ida; Schoop, Leslie; Seshadri, Ram | We present first-principles calculations suggesting that the ferromagnetic phase of cubic antiperovskite Mn 3ZnC is a nodal line Weyl semimetal. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1753 | Ultrasound Studies on the Chiral Antiferromagnet Mn3Ge | Theuss, Florian; Ghosh, Sayak; Chen, Taishi; Nakatsuji, Satoru; Ramshaw, Brad | We investigate how strains of different symmetry couple to the magnetic degrees of freedom on the Kagome lattice formed by manganese ions. | Session 118: Weyl semimetals, magnetism and superconductivity |
| 1754 | Magnetoelectric behavior in metal-organic complexes including spin crossovers compounds | Zapf, Vivien | In this talk I will review several of our recent efforts to extend this field of magnetoelectrics to metal-organic complexes, which contain transition metal ions and organic ligands. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1755 | On-chip Integrable Highly Spectrally Uniform Ordered Semiconductor Quantum Dot Single Photon Source Arrays for Scalable Quantum Optical Networks | Zhang, Jiefei; Chattaraj, Swarnabha; Lu, Siyuan; Madhukar, Anupam | In this talk we report studies on binary InAs/GaAs MTSQD in 5X8 arrays demonstrating striking spectral uniformity of 1.8nm (<2meV) over 1000um 2 area. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1756 | Fused LiNbO3-(Al)GaAs hybrids for quantum dots optomechanics | Nysten, Emeline; Huo, Yong-Heng; Yu, Hailong; Song, Guo-Feng; Rastelli, Armando; Krenner, Hubert | Here, we explore the possibility to enhance the interaction between the SAW and the QDs by transferring them on a strong piezoelectric LiNbO 3 substrate by epitaxial lift-off [4]. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1757 | Optomechanical single photon frequency division multiplexing | Weiss, Matthias; Wigger, Daniel; Nägele, Maximilian; Müller, Kai; Finley, Jonathan; Kuhn, T.; Machnikowski, Pawel; Krenner, Hubert | Here we report on the implementation of a hybrid nonlinear optomechanical scheme to generate frequency multiplexed of single photons from a single quantum dot. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1758 | Tailoring Nanoscale Crystal Polytype Selection for Quantum Confinement Engineering | Lu, Hongling; Moniri, Saman; Reese, Caleb; Jeon, Sunyeol; Katcher, Adam; Hill, Tyler; Deng, Hui; Goldman, Rachel | Here, we aim to create alloy-fluctuation-free QD arrays, namely poly-type QDs-in-NWs, using self-catalyzed NW growth at vapor-liquid-solid (VLS) triple-junctions. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1759 | Multiferroic triangular molecular qubits | Pederson, Mark; Canali, Carlo; Islam, Fhokrul; Johnson, Alexander | In this work, using standard density-functional methods, we demonstrate that the spin-electric behavior of this molecule could be even more interesting as there are energetically competitive reference states associated with both high and low local spins (S=5/2 vs. S=1/2) on the Fe 3+ ions. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1760 | Supercurrent in All-Van-der-Waals Josephson Tunnel Junction | Li, Qing; Wang, Joel; Yamoah, Megan; Bandurin, Denis; Kim, David; Melville, Alexander; Yoder, Jonilyn; Watanabe, Kenji; Taniguchi, Takashi; Orlando, Terry; Gustavsson, Simon; Oliver, William | In this work, we construct superconducting quantum devices with van der Waals (vdW) materials and their heterostructures, which feature crystalline layers with atomically precise interface. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1761 | Shadow lithography for in-situ growth of generic semiconductor/superconductor devices | Carrad, Damon; Bjergfelt, Martin; Kanne Nordqvist, Thomas; Aagesen, Martin; Krizek, Filip; Fiordaliso, Elisabetta; Johnson, Erik; Nygård, Jesper; Jespersen, Thomas Sand | Here, we present a crystal growth platform based on three-dimensional structuring of growth substrates for synthesising semiconductor nanowires with in-situ patterned superconductor shells. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1762 | Engineered Chirality of One-Dimensional Nanowires | Briggeman, Megan; Li, Jianan; Huang, Mengchen; Lee, Hyungwoo; Lee, Jung-Woo; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | We have developed a flexible platform for creating 1D nanostructures at the LaAlO 3/SrTiO 3 interface using a conductive atomic force microscope lithography technique. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1763 | InSb Nanostructures for Advanced Quantum Devices | Badawy, Ghada; Gazibegovic, Sasa; Leubner, Philipp; Borsoi, Francesco; Heedt, Sebastian; Shen, Jie; De Vries, Folkert; Koelling, Sebastian; Verheijen, Marcel; Kouwenhoven, Leo; Bakkers, Erik | Here, we show the growth of pure zinc blende InSb NWs and nanosheets. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1764 | InSbAs two-dimensional electron gases as a platform for topological superconductivity | Moehle, Christian; Ke, Chung-Ting; Thomas, Candice; Lodari, Mario; Scappucci, Giordano; Karwal, Saurabh; Metti, Sara; Guinn, Charles; Kallaher, Ray; Gardner, Geoffrey; Manfra, Michael; Goswami, Srijit | Here, we investigate a new 2D hybrid system consisting of ternary InSbAs 2DEGs with epitaxially grown aluminum. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1765 | Stable quantum dots in an InSb two-dimensional electron gas | Kulesh, Ivan; Ke, Chung-Ting; Thomas, Candice; Karwal, Saurabh; Moehle, Christian; Metti, Sara; Kallaher, Ray; Gardner, Geoffrey; Manfra, Michael; Goswami, Srijit | We overcome this by removing the δ-doping layer from the heterostructure, and induce carriers electrostatically. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1766 | Electron-phonon coupling in nitride superconductors from first principles: The effect of epitaxial strain and nitrogen concentration on superconducting properties | Pamuk, Betul; Khalsa, Guru | We find that both epitaxial strain and nitrogen concentration can drastically alter the electron-phonon coupling and potentially increase T c to temperature ranges sensible for superconducting devices. | Session 119: Semiconductors, Superconductors, and Molecular Qubits |
| 1767 | Quantum effect in the antiferromagnetic layered-perovskite materials with the triangular-lattice | Ma, Jie | Through the experimental and theoretical studies, we found that the Linear Spin-Wave + 1/S treatment was inadequate to explain our experimental observation and the interlayer interaction could not be ignored in the system [3, 4]. | Session 120: Triangular Lattice |
| 1768 | Effect of quenched disorder on an equilateral triangular lattice antiferromagnet Ba3CoSb2O9 | Huang, Qing; Zhou, Haidong; Hong, Tao; Choi, Eun; Ma, Jie; Li, Lu; Mauws, Cole; Wiebe, Christopher | We present a systematic study on effect of quenched disorder on magnetic properties in the Sr doped single-crystalline sample of Ba 2.8Sr 0.2CoSb 2O 9 by means of DC and AC susceptibilities, specific heat and advanced neutron scattering. | Session 120: Triangular Lattice |
| 1769 | Universal scaling of the heat capacity in a quantum spin liquid state of 1T-TaS2 | Murayama, Hinako; Sato, Yuki; Taniguchi, Tomoya; Kurihara, Ryo; Suzuki, Hiroki; Xing, Xianzhuo; Huang, Wenkai; Kasahara, Shigeru; Kasahara, Yuichi; Kimchi, Itamar; Yoshida, Masaro; Iwasa, Yoshihiro; Konczykowski, Marcin; Matsuda, Yuji | Here, we have investigated the low energy excitations on pure, Se-substituted and electron-irradiated 1T-TaS 2, a QSL candidate material with spin-1/2 on a triangular lattice[1, 2], by measuring low-temperature thermal conductivity and heat capacity. | Session 120: Triangular Lattice |
| 1770 | Magnetic Excitations and Q-dependent magnon lifetime in Non-collinear Metallic Antiferromagnet CrB2 | Park, Pyeongjae; Park, Kisoo; Kim, Taehun; Kousaka, Yusuke; Akimitsu, Jun; Perring, Toby; Kenzelmann, Michel; Park, Je-Guen | By excluding the effects of instrumental resolution, we mapped the intrinsic magnon linewidth Γ(q, E) which shows some unusual behavior. | Session 120: Triangular Lattice |
| 1771 | Terahertz study of the frustrated triangular Ising magnet FeI2 | Legros, Anaelle; Chaudhuri, Dipanjan; Bai, Xiaojian; Dun, Zhiling; Mourigal, Martin; Armitage, Peter | We present the results from in-field time-domain terahertz spectroscopy on FeI 2. | Session 120: Triangular Lattice |
| 1772 | Synthesis and frustrated magnetism of the triangular lattice ARESe2 single crystals | Xing, Jie; Sanjeewa, Liurukara; Kim, Jungsoo; Stewart, Gregory; Du, Maohua; Reboredo, Fernando; Custelcean, Radu; Sefat, Athena | We have characterized them through magnetization and heat capacity down to 0.4 K. Antiferromagnetic interactions with large magnetic anisotropy is observed, while no long-range order is found indicating frustrated magnetism. | Session 120: Triangular Lattice |
| 1773 | Measurement of a 1/2 magnetization plateau in a frustrated antiferromagnet | Haley, Shannon; Maksimovic, Nikola; Maniv, Eran; Parker, Daniel; Singleton, John; Moore, Joel; Analytis, James | This talk will discuss our recent discovery of a ½ magnetization plateau in a frustrated antiferromagnet on a triangular lattice using fields up to 65T. | Session 120: Triangular Lattice |
| 1774 | Novel Excitations near Quantum Criticality in Geometrically Frustrated Antiferromagnet CsFeCl3 | Masuda, Takatsugu; Hayashida, Shohei; Matsumoto, Masashige; Hagihala, Masato; Kurita, Nobuyuki; Tanaka, Hidekazu; Itoh, Shinichi; Hong, Tao; Soda, Minoru; Uwatoko, Yoshiya | We present neutron scattering under pressure in a triangular-lattice antiferromagnet that has a quantum disorder in the low-pressure phase and a noncollinear structure in the high-pressure phase [1]. | Session 120: Triangular Lattice |
| 1775 | Evidence of one-dimensional magnetic heat transport in the triangular-lattice antiferromagnet Cs2CuCl4 | Schulze, Erik; Arsenijevic, Stevan; Opherden, Lars; Ponomaryov, Alexey; Wosnitza, Joachim; Ono, Toshio; Tanaka, Hidekazu; Zvyagin, Sergei | We report on low-temperature heat-transport properties of the spin-1/2 triangular-lattice antiferromagnet Cs 2CuCl 4. | Session 120: Triangular Lattice |
| 1776 | Torque equilibrium spin wave theory study of anisotropy and Dzyaloshinskii-Moriya interaction effects on the indirect K− edge RIXS spectrum of a triangular lattice antiferromagnet | Datta, Trinanjan; Jin, Shangjian; Cheng, Luo; Yao, Dao-Xin | We apply the recently formulated torque equilibrium spin wave theory (TESWT) to compute the 1/ S-order interacting K -edge bimagnon resonant inelastic x-ray scattering (RIXS) spectra of an anisotropic triangular lattice antiferromagnet with Dzyaloshinskii-Moriya (DM) interaction [1]. | Session 120: Triangular Lattice |
| 1777 | A New Yb-based Spin-1/2 Triangular Lattice Magnet | Guo, Shu; Cava, Robert | Here, we present a cubic stacking Yb-based TL magnet. | Session 120: Triangular Lattice |
| 1778 | Characterizing the Spin-½ Heisenberg model on the triangular lattice through the Dynamical Spin Structure | Tang, Ta; Devereaux, Thomas; Moritz, Brian; Jiang, Yi-Fan | Here, we use exact diagonalization on a series of finite-size clusters to analyze the character of the ground state and lowest-lying the excited states of the model for various values of J 2. | Session 120: Triangular Lattice |
| 1779 | Generalized SU(3) Spin Wave Theory on Effective S=1 Triangular Lattice Magnet FeI2 | Zhang, Hao; Zhang, Shang-Shun; Bai, Xiaojian; Dun, Zhiling; Stone, Matthew; Kolesnikov, Alexander; Ye, Feng; Mourigal, Martin; Batista, Cristian | Generalized SU(3) Spin Wave Theory on Effective S=1 Triangular Lattice Magnet FeI2 | Session 120: Triangular Lattice |
| 1780 | Magnetic Excitations of the Frustrated Triangular Ising Magnet FeI2 | Bai, Xiaojian; Zhang, Shang-Shun; Dun, Zhiling; Zhang, Hao; Phelan, William; Zhou, Haidong; Stone, Matthew; Kolesnikov, Alexander; Ye, Feng; Batista, Cristian; Mourigal, Martin | We present a detailed investigation of the spin dynamics in single-crystals of the layered spin-one triangular-lattice compound FeI2. | Session 120: Triangular Lattice |
| 1781 | Anisotropic-exchange magnets: triangular lattice and all | Chernyshev, Alexander | I will describe our efforts to understand the phase diagram of a model that combines paradigmatic geometrical frustration of spins on a triangular lattice with strong spin-orbit-induced interactions. | Session 120: Triangular Lattice |
| 1782 | Interplay between magnetic structures, domain physics, and transport properties in a family of triangular layered materials | Liu, Chunxiao; Balents, Leon | We analyze the possible magnetic orders of the most general symmetry allowed spin Hamiltonian at nearest neighbor level. | Session 120: Triangular Lattice |
| 1783 | Triangular antiferromagnet NiGa2S4: a low-dimensional analog of the pyrochlores? | Wang, Haoyu; Tchernyshyov, Oleg | We propose a different scenario based on a simple observation: the 4-sublattice structure resulting from a strong J3 makes the system similar to a pyrochlore antiferromagnet. | Session 120: Triangular Lattice |
| 1784 | Complex magnetic behavior of the Co2+ triangular (saw-tooth) 1D chains in CsCo2(MoO4)2(OH) | Sanjeewa, Duminda; Garlea, Vasile; Xing, Jie; Sefat, Athena | We synthesize CsCo 2(MoO 4) 2(OH) single crystals, find the crystal structure, and characterize thermodynamic properties. | Session 120: Triangular Lattice |
| 1785 | Synthesis and Characterization of Rare-Earth Based Triangular Antiferromagnet Borates | Ennis, Matthew; Bag, Rabindranath; Dissanayake, Sachith; Shi, Zhenzhong; Kolesnikov, Alexander; Rodriguez-Rivera, Jose; Wu, Hui; Brown, Craig; Graf, David; Haravifard, Sara | In this talk, we will present the results of our experimental efforts. | Session 120: Triangular Lattice |
| 1786 | Magnetic short-range correlations and Kosterlitz-Thouless transitions in TmMgGaO4 | Daum, Marcus; Dun, Zhiling; Zhou, Haidong; Mourigal, Martin | Using AC susceptibility and neutron scattering measurements, we unveil this transition and discuss its implications in understanding the rich physics of TmMgGaO4. | Session 120: Triangular Lattice |
| 1787 | Studying the Dynamic Magnetic Properties of the Triangular Antiferromagnet YbZnGaO4 in Applied Field | Steinhardt, William; Dissanayake, Sachith; Shi, Zhenzhong; Butch, Nicholas; Graf, David; Podlesnyak, Andrey; Liu, Yaohua; Zhao, Yang; Xu, Guangyong; Lynn, Jeffrey; Marjerrison, Casey; Haravifard, Sara | In this talk we discuss neutron scattering experiments in applied magnetic field to probe features of the “partially magnetized” state in YbZnGaO4, which generated great excitement in YbMgGaO4 as a possible signature in support of spinon Fermi surface hypothesis [1]. | Session 120: Triangular Lattice |
| 1788 | A quantitative study of short-range correlations in triangular Ising antiferromagnet TmMgGaO4 via magnetic pair distribution function analysis | Baral, Raju; Frandsen, Benjamin; Fischer, Henry; Huang, Qing; Zhou, Haidong; Daum, Marcus; Dun, Zhiling; Mourigal, Martin | We present a magnetic model that reproduces the observed mPDF pattern with quantitative accuracy and discuss the significance of these results in the context of existing work on TmMgGaO 4. | Session 120: Triangular Lattice |
| 1789 | Chiral correlation in triangular lattice Hubbard model | Chen, Bin-Bin; Li, Wei; Weichselbaum, Andreas | In this talk, I will focus on finite-size DMRG simulations of the TLH for system sizes that go clearly beyond [2] while also exploiting SU(2) spin symmetry. | Session 120: Triangular Lattice |
| 1790 | Topological frustration: Quantum statistics of vortices from a dual theory of the XY ferromagnet | Dasgupta, Sayak; Zhang, Shu; Bah, Ibrahima; Tchernyshyov, Oleg | Here we show that topological frustration at the vortex core may induce a nontrivial quantum statistics of vortices. | Session 120: Triangular Lattice |
| 1791 | Topological phenomena in magnetic topological insulator thin films | Wang, Wenbo | In the first part, we will present direct visualization of long-range ferromagnetism in the Cr,V co-doped BST films, by using the MFM and in-situ transport measurement[3]. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1792 | Magneto-transport in PbxSn1-xSe Quantum Well | Wang, Jiashu; Liu, Xinyu; Riney, Logan; Furdyna, Jacek; Assaf, Badih | We applied several model to explain this phenomenon. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1793 | Magnetotransport properties in antimony single crystals | Chu, Paul C. W.; Wu, Zheng; Deng, Liangzi; Gooch, Melissa; Bontke, Trevor | Magnetotransport properties in antimony single crystals | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1794 | Thickness Dependence of Electronic Properties of Topological Antiferromagnet MnBi2Te4 Films | Zhao, Yifan; Wang, Guang; zhou, lingjie; Ovchinnikov, Dmitry; Wang, Fei; zhang, ling; Yi, Hemian; zhang, baitao; Chan, Moses; Xu, Xiaodong; Chang, Cui-Zu | Here, we synthesized MnBi 2Te 4 thin films with thicknesses down to one layer using molecular beam epitaxy (MBE) and systematically studied the thickness dependence of electronic properties. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1795 | Discovery of a quantum topological kagome magnet by vector magnetic field-based STM | Yin, Jiaxin; Ma, Wenlong; Zhang, Songtian Sonia; Cochran, Tyler; Xu, Xitong; Shumiya, Nana; Lian, Biao; Song, Zhida; Jiang, Kun; Chang, Tay-Rong; Neupert, Titus; Wang, Ziqiang; Yao, Nan; Jia, Shuang; Hasan, Zahid | Here we use the same vector magnetic field-based STM technique combined with Berry curvature sensitive transport to discover a new quantum topological kagome magnet. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1796 | Quantum oscillations in thin films of antiferromagnetic kagome metal FeSn | Han, Minyong; Inoue, Hisashi; Chan, Mun; Graf, David; Ye, Linda; Suzuki, Takehito; Checkelsky, Joseph | Here we report the quantum oscillation studies on thin films of FeSn. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1797 | Dirac-Surface-State-Modulated Bilinear Magnetoresistance in Topological Insulators | Wang, Fei; zhang, ling; Wang, Ziqiao; Zhao, Yifan; Xiao, Run; Wang, Guang; Yi, Hemian; zhou, lingjie; Zhang, Ruoxi; zhang, baitao; Chan, Moses; Samarth, Nitin; Li, Qi; Zhao, Weiwei; Chang, Cui-Zu | Dirac-Surface-State-Modulated Bilinear Magnetoresistance in Topological Insulators | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1798 | Dirac Band Engineering of Topological Insulator/Graphene Hybrid Structures | Wang, Guang; Zhao, Yifan; Fu, Huixia; Huang, Zengle; Wang, Fei; Yi, Hemian; Pillsbury, Timothy; zhou, lingjie; Dong, Chengye; Robinson, Joshua; Samarth, Nitin; Wu, Weida; yan, binghai; Chang, Cui-Zu | We recently used molecular beam epitaxy to fabricate the (Bi 1-xSb x) 2Te 3/graphene hybrid structures and systematically studied the electronic band structures as a function of x and thickness. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1799 | Topological Properties of SnSe/EuS and SnTe/CaTe Heterostructures | Yang, Shuyang; Wu, Chunzhi; Marom, Noa | We use density functional theory (DFT) to study epitaxial interfaces of the topological crystalline insulators SnSe and SnTe with the ferromagnetic semiconductor EuS and the nonmagnetic semiconductor CaTe, respectively. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1800 | Synthesis of hybrid oxide/chalcogenide interfaces to explore topological crystalline insulator properties | Albright, Stephen; Zou, Ke; Pan, Shuhang; Walker, Frederick; Ahn, Charles | This work presents growth of SnTe thin enough to achieve topological state control on a substrate, SrTiO 3, easily integrated into field-effect devices. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1801 | Modular Arithmetic with Nodal Lines: Drumhead Surface States in ZrSiTe | Muechler, Lukas; Topp, Andreas; Queiroz, Raquel; Krivenkov, Maxim; Varykhalov, Andrei; Cano, Jennifer; Ast, Christian; Schoop, Leslie | We study the electronic structure of the nodal line semimetal ZrSiTe both experimentally and theoretically. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1802 | NMR investigation of topological quantum material ZrTe5 | Tian, Yefan; Ghassemi, Nader; Ross, Joseph | In this work, we performed 125Te NMR measurements on the topological quantum material ZrTe 5. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1803 | Heteroepitaxial growth of single layer ferromagnetic VSe2 on graphene and Bi2Se3 | Li, Mengchen; Liu, Ying | In this work, we report the results of the heteroepitaxial growth of VSe 2 on epitaxial graphene/6H-SiC(0001) and topological insulator Bi 2Se 3. | Session 121: Topological Materials: Magnetism and Hybrid Structures |
| 1804 | Self-learning projective quantum Monte Carlo simulations guided by restricted Boltzmann machines | Pilati, Sebastiano; Inack, Estelle; Pieri, Pierbiagio | In this work, we present a novel method that uses unsupervised machine learning techniques to combine the two steps above. We present extensive benchmarks that demonstrate the efficiency of our self-learning method. | Session 122: Machine learning for quantum matter |
| 1805 | Self-learning Hybrid Monte Carlo method for first-principles molecular simulations | Nagai, Yuki; Okumura, Masahiko; Kobayashi, Keita; Shiga, Motoyuki | We propose a novel approach called Self-Learning Hybrid Monte Carlo (SLHMC)[1] which is a general method to make use of machine learning potentials to accelerate the statistical sampling of first-principles density-functional-theory (DFT) simulations. | Session 122: Machine learning for quantum matter |
| 1806 | On-the-fly machine learning algorithm for accelerating Monte Carlo sampling: Application to the stochastic analytical continuation | Yoon, Hongkee; Han, Myung Joon | We present a new Monte Carlo method whose sampling is assisted by modern machine learning (ML) technique. | Session 122: Machine learning for quantum matter |
| 1807 | Automatic Differentiable Monte Carlo: Theory | Zhang, Shixin; Wan, Zhou-Quan; Yao, Hong | Here we propose a general theory framework with detach function techniques enabling infinite order automatic differentiation on Monte Carlo expectations with unnormalized probability distributions. | Session 122: Machine learning for quantum matter |
| 1808 | Automatic Differentiable Monte Carlo: Applications | Wan, Zhouquan; Zhang, Shixin; Yao, Hong | By introducing automatic differentiable Monte Carlo (ADMC), we can leverage state-of-the-art machine learning frameworks and techniques to traditional Monte Carlo approaches in statistics and physics by simply implementing relevant Monte Carlo algorithms on computation graphs. | Session 122: Machine learning for quantum matter |
| 1809 | Optimal Real-Space Renormalization-Group Transformations with Artificial Neural Networks | Chung, Jui-Hui; Kao, Ying-Jer | We introduce a general method for optimizing real-space renormalization-group transformations to study the critical properties of a classical system.The scheme is based on minimizing the Kullback-Leibler divergence between the distribution of the system and the normalizing factor of the transformation parametrized by a restricted Boltzmann machine. | Session 122: Machine learning for quantum matter |
| 1810 | Machine-learning-accelerated predictions of optical properties of condensed systems based on many-body perturbation theory | Dong, Sijia; Govoni, Marco; Galli, Giulia | We present an approach to improve the efficiency of first principles calculations of absorption spectra of complex materials at finite temperature, based on the solution of the Bethe-Salpeter equation (BSE) [1]. | Session 122: Machine learning for quantum matter |
| 1811 | Machine Learned Spectral Functions for the Quantum Impurity Problem | Sturm, Erica; Carbone, Matthew; Lu, Deyu; Weichselbaum, Andreas; Konik, Robert | This work leverages a feed-forward neural network (NN) to predict the spectral functions of the single impurity Anderson model (SIAM) as a function of five physical parameters including the Coulomb interaction U, hybridization constant Γ, impurity energy ε d, magnetic field B, and temperature T. | Session 122: Machine learning for quantum matter |
| 1812 | Finding New Mixing Strategies for Self Consistent Field Procedures Using Reinforcement Learning | Abarbanel, Daniel; Guo, Hong | We present a new method to discover mixing strategies by applying a reinforcement learning algorithm (RLA). | Session 122: Machine learning for quantum matter |
| 1813 | Machine learning spin dynamics in the double-exchange systems | Zhang, Puhan; Saha, Preetha; Chern, Gia-Wei | Here we propose a machine learning (ML) technique that can solve the dynamics of the DE model in linear time complexity. | Session 122: Machine learning for quantum matter |
| 1814 | Machine learning of high-throughput DFT electron densities | Hung, Linda; Schweigert, Daniel; Bhargava, Arjun; Gopal, Chirranjeevi | In this talk, we demonstrate how electron density datasets from these databases can be used to train machine learning models that complement and enhance the capabilities of DFT. | Session 122: Machine learning for quantum matter |
| 1815 | Machine learning as a solution to the electronic structure problem | Gonzalez del Rio, Beatriz; Ramprasad, Ramamurthy | A promising development in recent years is the use of machine learning (ML) methodologies to train surrogate models with DFT data to predict quantum-accurate results for larger systems. | Session 122: Machine learning for quantum matter |
| 1816 | Machine learning spectral indicators of topology | Andrejevic, Nina; Andrejevic, Jovana; Rycroft, Christopher; Li, Mingda | Here, we study the effectiveness of XAS as a predictor of topology using machine learning methods to disentangle key structural information from the complex spectral features. | Session 122: Machine learning for quantum matter |
| 1817 | Nicholas Metropolis Award Talk: Enhancing Quantum Simulators with Neural Networks | Torlai, Giacomo | I will present results for a cold Rydberg-atom quantum simulator and quantum chemistry calculations on a superconducting quantum hardware. | Session 122: Machine learning for quantum matter |
| 1818 | Topological codes revisited: Hamiltonian learning and topological phase transitions | Greplova, Eliska; Valenti, Agnes; Van Nieuwenburg, Evert; Boschung, Gregor; Schäfer, Frank; Loerch, Niels; Huber, Sebastian | We introduce a neural net based approach to this challenge. | Session 122: Machine learning for quantum matter |
| 1819 | Real time evolution with neural network quantum states | Lopez Gutierrez, Irene; Mendl, Christian | In this work, we propose the use of standard machine learning optimization techniques, combined with a modified backpropagation for a neural network with complex parameters, to tackle the time evolution of an example system: the Ising model in 1 and 2-D. | Session 122: Machine learning for quantum matter |
| 1820 | Hunting for Hamiltonians with a General-Purpose Symmetry-to-Hamiltonian Approach | Chertkov, Eli; Villalonga, Benjamin; Clark, Bryan | In this talk, we will introduce the SHC method and discuss the topological Hamiltonians that we find. | Session 122: Machine learning for quantum matter |
| 1821 | Studying inhomogeneous quantum many-body problems using neural networks | Blania, Alexander; Van Nieuwenburg, Evert; Marquardt, Florian | We show how convolutional neural networks can be employed to learn the mapping from arbitrary potential landscapes to observables in quantum many-body systems. | Session 122: Machine learning for quantum matter |
| 1822 | Calculating Wannier functions via basis pursuit using a machine learned dictionary | Magnetta, Bradley; Ozolins, Vidvuds | In this work we provide a modern method for calculating Wannier functions via projection by incorporating basis pursuit into the quantum variational method to automatically generate a set of localized functions needed to enforce localization while obtaining the ground state. | Session 122: Machine learning for quantum matter |
| 1823 | Classical Quantum Optimization with Neural Network Quantum States | Gomes, Joseph | Here, we demonstrate the utility of the variational representation of quantum states based on artificial neural networks for performing quantum optimization. | Session 122: Machine learning for quantum matter |
| 1824 | Solving frustrated quantum many-particle models with convolutional neural networks | Liang, Xiao | In this paper, we design a brand new convolutional neural network (CNN) to solve such quantum many-particle problems. | Session 122: Machine learning for quantum matter |
| 1825 | Quantum dynamics in driven spin systems with neural-network quantum states | Hofmann, Damian; Carleo, Giuseppe; Rubio, Angel; Sentef, Michael | In this talk, we study magnetic excitations in a driven two-dimensional Heisenberg antiferromagnet. | Session 122: Machine learning for quantum matter |
| 1826 | Study of phi-4 theories with deep learning methods | Lai, Zhong Yuan; Meirinhos, Francisco; Li, Xiaopeng | In this talk I will present our recent work combining field theoretical and deep learning methods to systematically account for non-perturbative aspects. | Session 122: Machine learning for quantum matter |
| 1827 | Unsupervised machine learning for accelerating discoveries from temperature dependent X-ray data | Venderley, Jordan; Matty, Michael; Kishore, Varsha; Pleiss, Geoff; Weinberger, Kilian; Kim, Eun-Ah | Here, we present a novel unsupervised machine learning approach for accelerating the analysis of temperature dependent single crystal X-ray diffraction data. | Session 122: Machine learning for quantum matter |
| 1828 | Machine learning effective models for quantum systems | Mitchell, Andrew; Rigo, Jonas | Using information theoretic techniques, we propose a model machine learning approach that optimizes an effective model based on an estimation of its partition function. | Session 122: Machine learning for quantum matter |
| 1829 | Probing the Ultrafast Nonlinear Response in the Transition Metal Monopnictide Family of Weyl Semimetals | Sirica, Nicholas; Tobey, Ra’anan; Dai, Yaomin; Orth, Peter; Scheurer, Mathias; Trugman, Stuart; Zhu, Jian-Xin; Ni, Ni; Qiu, Xianggang; Taylor, Antoinette; Yarotski, Dzmitry; Prasankumar, Rohit | Recently, several studies have centered on the nonlinear optical properties of these materials, where it is believed that characteristic features of Weyl physics can be observed. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1830 | Giant nonlinear optical response in topological semimetals | Wu, Liang | In both cases, we observed large optical nonlinearity and the possible origins will be discussed. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1831 | Imaging current in semimetals with cryogenic scanning NV magnetometry | Vool, Uri; Hamo, Assaf; Zhou, Xu; Gooth, Johannes; Felser, Claudia; Yacoby, Amir | Using coherent quantum sensing, we obtain magnetic field resolution of ~10nT and spatial resolution of ~100nm. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1832 | Observation of a Dirac nodal loop in the non-symmorphic semimetal Nb3SiTe6 | Liu, Ro-Ya; Huang, Angus; Su, Chih-Chuan; Sankar, Raman; Weng, Shih-Chang; Lin, Meng-Kai; Chen, Peng; Hlevyack, Joseph; Fedorov, Alexei; Cheng, Cheng-Maw; Denlinger, Jonathan; Chang, Chia-Seng; Jeng, Horng-Tay; Chuang, Tien-Ming; Chiang, Tai-Chang | This talk will present a detailed study of the band structure of Nb3SiTe6 by angle-resolved photoemission spectroscopy. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1833 | Momentum space signature of Berry curvature monopoles in a Weyl semimetal: from first principles to direct experimental observation | Eck, Philipp; Ünzelmann, Maximilian; Figgemeier, Tim; Reinert, Friedrich; Bentmann, Hendrik; Di Sante, Domenico; Sangiovanni, Giorgio | We investigate the Fermi arcs and the Weyl points in the prototypical non-centrosymmetric time-reversal invariant Weyl semimetal family TaAs/TaP in a joint analysis of state-of-the-art Ab-initio calculations and advanced photoemission spectroscopy methods. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1834 | Study of hot electrons in topological nodal-line semimetal ZrSiS using time- and angle-resolved photoemission spectroscopy | Liu, Yangyang; Hosen, M. Mofazzel; Dhakal, Gyanendra; Sims, Christopher; Beetar, John; Regmi, Sabin; Dimitri, Klauss; Kabir, Firoza; Kaczorowski, Dariusz; Chini, Michael; Neupane, Madhab | We have studied the ultrafast hot electron cooling process on topological nodal-line semimetal ZrSiS using an advanced XUV-based time- and angle-resolved photoemission spectroscopy (trARPES) with sub-30 meV energy resolution and 320 fs time resolution. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1835 | Symmetry-Enforced Dirac Fermions in Nonsymmorphic α-Bismuthene | Bian, Guang | Here we will discuss our recent work on the realization of the symmetry-enforced Dirac fermions in nonsymmorphic α-bismuthene (Bi monolayer). | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1836 | Molecular Beam Epitaxy, Band Structure, and Electrical Properties of the Dirac Semimetal ZrTe2 | Pillsbury, Timothy; Richardella, Anthony; Xiao, Run; Yanez, Wilson; Stanley, Max; Yi, Hemian; Chang, Cui-Zu; Samarth, Nitin | We used molecular beam epitaxy to synthesize ZrTe 2 thin films on insulating sapphire (0001) substrates and performed systematic in vacuo angle-resolved photoemission spectroscopy (ARPES) measurements. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1837 | Observation of linearly dispersive edge modes in a magnetic Weyl semimetal Co3Sn2S2 | Howard, Sean; Jiao, Lin; Wang, Zhenyu; Vir, Praveen; Shekhar, Chandra; Felser, Claudia; Hughes, Taylor; Madhavan, Vidya | In this work we present a combined scanning tunneling spectroscopy and theoretical investigation of a newly discovered magnetic Weyl semimetal, Co3Sn2S2. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1838 | Generation of strain-induced pseudo-magnetic field in a doped type-II Weyl semimetal | Kamboj, Suman; Rana, Partha; Sirohi, Anshu; Vasdev, Aastha; Mandal, Manasi; Marik, Sourav; Singh, R P; Das, Tanmoy; Sheet, Goutam | We will show the emergence of a pseudo-magnetic field in a doped and intrinsically strained type-II Weyl semimetal by Scanning Tunneling Spectroscopy (STS) down to 300 mK. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1839 | Theoretical Study of Quasiparticle Interference in Weyl Semimetals with ab initio Band Structure Informed Tight-Binding Hamiltonian | Huang, Zhao; Yarotski, Dzmitry; Taylor, Antoinette; Zhu, Jian-Xin | Here we theoretically study the quasiparticle interference (QPI) due to impurity scattering on surfaces in several Weyl semimetals. | Session 123: Weyl semimetals, ARPES, STM and optics |
| 1840 | Room-Temperature Superconductivity in High-Pressure Hydrides: An electronic structure perspective | Boeri, Lilia | [2] In this talk, I will show how electronic structure methods can be used to understand the material-specific aspects that underlie high-T c superconductivity in different classes of hydrides,[3] and identify strategies to reduce the pressure for high-T c conventional superconductivity. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1841 | Design of Ternary Ca-S-H System that are Superconducting Under Pressure | Yan, Yan; Bi, Tiange; Geng, Nisha; Wang, Xiaoyu; Zurek, Eva | Here, we present a systematic investigation of Ca-S-H phases with various stoichiometries. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1842 | Quantum Crystal Structure in the 250 K Superconducting Lanthanum Hydride | Errea, Ion; Belli, Francesco; Monacelli, Lorenzo; Sanna, Antonio; Koretsume, Takashi; Tadano, Terumasa; Bianco, Raffaello; Calandra, Matteo; Arita, Ryotaro; Mauri, Francesco; Flores Livas, Jose | Here we show that quantum atomic fluctuations stabilize in this pressure range a high-symmetry Fm-3m crystal structure consistent with experiments. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1843 | High field phase diagram of LaH10 | Sun, Dan; Minkov, Vasily; Kong, Panpan; Drozdov, Alexander; Mozaffari, Shirin; Balicas, Luis; Eremets, Mikhail; Balakirev, Fedor | Recent research on the hydrogen-rich hydrides pushes the superconducting transition temperature (T c) near the limit of room temperature. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1844 | Effect of pressure on the noncentrosymmetric antiferromagnet CeNiC2 | Gouchi, Jun; Shigeoka, Toru; Uwatoko, Yoshiya | In this talk, I will present the pressure phase diagram of CeNiC2 single crystal based on our recent pressure dependence of transport and magnetic data. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1845 | AB3Si3 (A= Na, K, Rb, Cs), the alkali metal borosilicide in sodalite structure with superconductivity under high pressure | Zhang, Miao; Zurek, Eva | We herein report the structural and physical properties of AB 3Si 3 (A= Na, K, Rb and Cs) in clathrate-based sodalite structure, whose frameworks consist of covalent B-Si bonds, by first-principles calculations. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1846 | Charge Transfer Induced Band Gap Closure: Trend in Rare Earth Tetrahydrides Discovered under Pressure | Bi, Tiange; Zurek, Eva | Charge Transfer Induced Band Gap Closure: Trend in Rare Earth Tetrahydrides Discovered under Pressure | Session 124: Matter in Extreme Environments: Superconductivity |
| 1847 | Fermiology Study of YBCO | Grockowiak, Audrey; Coniglio, William; Tozer, Stanley | We report on high pressure SdH studies of YBCO6.5 (p=0.1) at He-3 temperatures in pulsed fields to 85 T and 7 GPa at HLD and dc fields of 45 T and pressures of 25 GPa at NHMFL using plastic and metal diamond anvil cells (DACs), respectively, that are coupled with an LC tank circuit based on a tunnel diode oscillator. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1848 | Superconductivity in Li6P electride | Yang, Guochun | Here, we report that a pressure-induced stable Li 6P electride, identified by first-principles swarm structure calculations, becomes a superconductor with a predicted superconducting transition temperature T c of 39.3 K, which is the highest among already known electrides. | Session 124: Matter in Extreme Environments: Superconductivity |
| 1849 | Polymer epitaxy under heterogeneous confinement | Liu, Jason; Xia, Yang; Zheng, Geoffrey; Haataja, Mikko; Arnold, Craig; Priestley, Rodney | In this work, we heterogeneously confine the film into spatially disparate regions of varying thickness to separate the nucleation and growth processes, allowing oriented arrays of epitaxial crystals to grow unimpeded over long distances. | Session 125: Polymer Crystals and Crystallization |
| 1850 | Understanding polymer crystallization undergoing zone annealing | Krauskopf, Alejandro; Jimenez, Andrew; Kumar, Sanat; Lewis, Elizabeth; Vogt, Bryan; Pribyl, Julia; Benicewicz, Brian | Through the application of the Hermans orientation function to our small-angle X-ray scattering detector patterns, we explore the extent of anisotropy that the process imparts on both the pure polymer and the polymer nanocomposite systems, with a focus on the lamellar orientation for the former and the nanoparticle arrangement for the latter. | Session 125: Polymer Crystals and Crystallization |
| 1851 | Tie Molecules and the Brittle-to-Ductile Transition in Near-Monodisperse and Bidisperse Linear Polyethylene | Cho, Seong Hyuk; Register, Richard | The Huang-Brown (HB) model predicts that tie molecules (TM), polymer chains that connect different crystalline lamellae across the amorphous layer, form when the end-to-end distance of the coil in the melt (R) exceeds the intercrystalline spacing (d) in the solid state, i.e., the TM probability should scale with R/d. | Session 125: Polymer Crystals and Crystallization |
| 1852 | Flow Induced Crystallization: Insights from Molecular Simulation | Nicholson, David; Yi, Peng; Rutledge, Gregory | Results for nucleation kinetics accelerated under different modes of deformation, e.g. simple shear or uniaxial extension, and rates of strain are used to assess several of the existing models in the literature for flow-enhanced nucleation, based on their abilities to describe the data accurately, and new models based on the orientational ordering of Kuhn segments induced by flow are proposed. | Session 125: Polymer Crystals and Crystallization |
| 1853 | Stereoregularity, Molecular Dynamics, and Unusual Crystallinity of Hydrogenated Polynorbornenes: Configurational Disorder | Miyoshi, Toshikazu; Kafle, Navin; Makita, Yuta | Recently, a thorough study on stereospecific ring-opening metathesis polymerization has been conducted on norbornenes making the synthesis and the study of hydrogenated polynorbornene (hPNB) stereoisomers possible. | Session 125: Polymer Crystals and Crystallization |
| 1854 | Crystallization of Asymmetric PEO-b-PCL from Different Solvents | Van Horn, Ryan | Our previous work showed that the crystallization order could be switched in symmetric copolymers (nearly equal mass fraction) through selective solvent interactions. | Session 125: Polymer Crystals and Crystallization |
| 1855 | Symmetry breaking via polymer chain overcrowding in molecular bottlebrush crystallization | Li, Christopher; Qi, Hao; Staub, Mark; Henn, Daniel; Zhao, Bin | In this talk, we present the spontaneous formation of spherical hollow crystals with broken translational symmetry in crystalline molecular bottlebrush (mBB) polymers. | Session 125: Polymer Crystals and Crystallization |
| 1856 | Improving Crystallite Size and Orientation in Organic Semiconductor Thin Films using PDMS-Assisted Crystallization | Zhelyaskova, Vesta; Sharma, Prachi; Dessau, Daniel; Shaheen, Sean | We aim to develop a scalable, solution-based method for growing crystalline organic semiconductor thin films, which can be used in a variety of electronic charge transport, metal doping, and device integration studies. | Session 125: Polymer Crystals and Crystallization |
| 1857 | Wang-Landau Simulation of the Free Energy Surface of Crystallization in a Polymer Melt | Kawak, Pierre; Gibson, Andrew; Brown, Logan; Delgado, Beverly; Tree, Douglas | To investigate these claims, we have constructed a GPU-accelerated Wang-Landau Monte Carlo algorithm that employs both configurational bias and bond breaking moves. | Session 125: Polymer Crystals and Crystallization |
| 1858 | Crystallization and self-nucleation of conjugated polymers | Fernandez-Ballester, Lucia; Hosseinabad, Ramin; Kuebler, Jesse | Here, we explore the role of molecular attributes on the crystallization behavior of poly-3-hexylthiophene under well-defined conditions. | Session 125: Polymer Crystals and Crystallization |
| 1859 | Paradigm on the Growth Kinetics of Lamellar Polymer Crystals | Hu, Wenbing | Paradigm on the Growth Kinetics of Lamellar Polymer Crystals | Session 125: Polymer Crystals and Crystallization |
| 1860 | Tuning Nanoparticle Dispersion to Control Confined Polymer Crystallization for Induced Ordering | Jimenez, Andrew; Al Torbaq, Abdullah; Müller, Alejandro; Kumar, Sanat | Tuning Nanoparticle Dispersion to Control Confined Polymer Crystallization for Induced Ordering | Session 125: Polymer Crystals and Crystallization |
| 1861 | Kinetics of Shape-fixing in Semicrystalline Shape-memory Networks | Yang, Jeh-Chang; Anthamatten, Mitchell | Kinetics of Shape-fixing in Semicrystalline Shape-memory Networks | Session 125: Polymer Crystals and Crystallization |
| 1862 | Controlling the Mechanical Behavior of Hydrogenated Polynorbornene | Klein, Jared; Register, Richard | In this talk, the effect of epimerization on both the stress-strain behavior and dynamic mechanical thermal properties are discussed. | Session 125: Polymer Crystals and Crystallization |
| 1863 | What happens upon annealing of pre-drawn semicrystalline polymers? | Smith, Travis; Wang, Shiqing | As part of efforts to understand mechanical behavior semicrystalline polymers under large deformation, we investigate what happens to predrawn semicrystalline polymers upon annealing at elevated temperatures. | Session 125: Polymer Crystals and Crystallization |
| 1864 | Entanglement Effect on Chain-Folding Structure in Semicrystalline Polymer Blends | Jin, Fan; Miyoshi, Toshikazu | In this study, we isothermally crystallize polymer blend samples consisting of long and short Poly(Lactic acid) chains from the melt state. | Session 125: Polymer Crystals and Crystallization |
| 1865 | Flow-Induced Crystallization of Polymers during Multi-Axial Deformation | Li, Liangbin | Considering the phenomenon of frustrating SIC for natural rubber during biaxial stretching, we proposed a new model for SIC based on the results of theoretical calculation and the in-situ X-ray scattering, which decoupled the free energy contributions of chain orientation from that of conformational entropy reduction. | Session 125: Polymer Crystals and Crystallization |
| 1866 | Homogeneous crystal nucleation – Nucleation kinetics and thermal stability of nuclei | Schick, Christoph; Adrianov, Ruslan; Mukhametzyanov, Timur; Androsch, Rene | We describe a method allowing to investigate the ability of nuclei to stabilize/grow on heating to the crystallization temperature [2] and, finally, to determine the thermal stability of homogeneous nuclei in polymers. | Session 125: Polymer Crystals and Crystallization |
| 1867 | Are Spherulites Spherical? 3D Visualization of Semicrystalline Polymer Morphology Using Optical Tomography | Yang, Shu-Gui; Wei, Zhen-Zhen; Ungar, Goran; Kazemi, Pantea; Xie, Hui-Jie; Cseh, Liliana; Saba, Hina | Here we present first such images obtained by confocal microscopy using appropriate sample preparation and image processing. | Session 125: Polymer Crystals and Crystallization |
| 1868 | Advanced Polymeric Particles Templated by Polymer Crystallization at Curved Liquid/Liquid Interface | Staub, Mark; Li, Christopher | This talk will focus upon using blends of amphiphilic block co-polymers in the miniemulsion process to template hierarchically structured crystalsomes. | Session 125: Polymer Crystals and Crystallization |
| 1869 | Phenomenological Theory of Prefreezing at the Solid-Melt Interface | Dolynchuk, Oleksandr; Tariq, Muhammad; Thurn-Albrecht, Thomas | We present a phenomenological theory of prefreezing and derive such equilibrium properties as the temperature dependent thickness of the prefrozen layer, the prefreezing temperature Tmax, and the mesoscopic jump of thickness at Tmax. | Session 125: Polymer Crystals and Crystallization |
| 1870 | Role of flow-induced nematic order in polyethylene nucleation | Zhang, Wenlin; Larson, Ronald | We employ united-atom molecular dynamics (MD) simulations to quantify the role of nematic order in polyethylene (PE) nucleation. | Session 125: Polymer Crystals and Crystallization |
| 1871 | Crystallization and liquid crystallinity in heptadecanylcarbazole-dithienylbenzothiadiazole (PCDTBT) conjugated polymers | Fair, Ryan; Gomez, Enrique | We use oscillatory shear rheology to demonstrate that PCDTBT exhibits liquid crystallinity by identifying the nematic to isotropic temperature. | Session 125: Polymer Crystals and Crystallization |
| 1872 | Analyzing morphological and optical properties of poly(3-hexylthiophene) (P3HT) via emitted light’s polarization | Nguyen, Huan; Araujo, Paulo | We study P3HT’s morphological and optical properties via measurements of absorption and polarization-resolved photoluminescence via Stokes spectroscopy. | Session 125: Polymer Crystals and Crystallization |
| 1873 | Computational Model for End-On LCEs | Waters, James; Balazs, Anna | We incorporate a theory of side-chain LCE’s into a constitutive model for elastomers to describe these competing effects. | Session 125: Polymer Crystals and Crystallization |
| 1874 | Deciphering the nature of anharmonicity in CH3NH3PbI3 by THz range Raman crystallography | Sharma, Rituraj; Dai, Zhenbang; Brenner, Thomas; Yadgarov, Lena; Gao, Lingyuan; Rakita, Yevgeny; Korobko, Roman; Pinkas, Iddo; Rappe, Andrew; Yaffe, Omer | We combine THz-range Raman crystallography and ab initio computation to elucidate the microscopic mechanisms governing the strongly anharmonic structural dynamics in MAPI. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1875 | Local Structure of 3D Halide Perovskites at High Pressure | Girdzis, Samuel; Lin, Yu; Mao, Wendy | Numerous studies have used compression to investigate structure-property relationships in these materials. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1876 | Bias stress effects in organic-inorganic halide perovskites | Flannery, Laura; Powell, Daniel; Whittaker-Brooks, Luisa | In this study, we continue to flush out how the changes in morphological defects and ion migration in the two OIHP materials are influencing charge transport. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1877 | Structural phase transitions and photoluminescence mechanism in a layer of 3D hybrid perovskite nanocrystals | Glinka, Yuri; Cai, Rui; Gao, Xian; Wu, Dan; Chen, Rui; Sun, Xiao Wei | Here using two-photon excited PL spectroscopy, we provide evidence that the structural phase transitions in a layer of 3D MAPbBr3 nanocrystals may occur at about the same temperatures as those in the corresponding single crystals. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1878 | Doping of Halide Perovskites | Zhang, Zhiqiang; Janotti, Anderson | In this presentation we discuss possible approaches to doping of MAPbI3, exploring substitutional and interstitial impurities, on both organic and inorganic sites. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1879 | Anharmonic Lattice Dynamics in CsPbBr3 | Lanigan-Atkins, Tyson; He, Xing; Krogstad, Matthew; Osborn, Raymond; Rosenkranz, Stephan; Chung, Duck Young; Kanatzidis, Mercouri; Pajerowski, Daniel; Xu, Guangyong; Delaire, Olivier | We report inelastic neutron scattering (INS) studies, supported by anharmonic first-principles simulations, on CsPbBr 3 across its three phases. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1880 | Structural Studies of Halide Perovskite Photovoltaic Systems | Liu, Sizhan; Balasubramanian, Mahalingam; Wang, SuYin; Chen, Yu-Sheng; Lalancette, Roger; Ghose, Sanjit; Yan, Yong; Tyson, Trevor | To develop accurate models of these systems, it is critical to understand their structural phases and atomic level properties. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1881 | Particle Ordering and A-site Composition Effects in Hybrid Organic-Inorganic Metal Halide Perovskite Quantum Dot Films | Vigil, Julian; Toney, Michael; Luther, Joseph | The patterns also show evidence of crystallographic phase inhomogeneities and a transition from cubic (FAPbI 3) to tetragonal (Cs 0.5FA 0.5PbI 3) to orthorhombic (CsPbI 3) character in the composition series. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1882 | Stress effects on vibrational spectra of orthorhombic and tetragonal hybrid perovskites. | Talit, Kuntal; Strubbe, David | Applying small uniaxial strains along three crystal axes, we have analyzed changes in frequency and phonon displacement patterns. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1883 | Pressure-induced Phase Changes in Cesium Lead Bromide Perovskite Nanocrystals with Planar Defects | Yesudhas, Sorb; Morrell, Maria V; Anderson, Matthew J; Ullrich, Carsten; Kenney-Benson, Curtis; Xing, Yangchuan; Guha, Suchismita | We compare synchrotron-based high pressure X-ray diffraction and photoluminescence (PL) properties of CsPbBr 3 (without RP) and RP-CsPbBr 3 (with RP), and resolve their crystal structure under pressure for the first time. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1884 | Origin of Edge Emission in Two-Dimensional Ruddlesden-Popper Hybrid Perovskites | Qin, Zhaojun; Dai, Shenyu; Gajjala, Chalapathi; Wang, Chong; Reddy, Rohith; Mayerich, David; Wang, Zhiming; Bao, Jiming | In this work, we observe the edge emission in 2D exfoliated perovskites and clarify the mechanism of edge emission. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1885 | Stabilization of a black CsPbI3 Perovskite phase via octahedral tilting control with pressure | Ke, Feng; Wang, Chenxu; Yan, Jiejuan; Wolf, Nathan R.; Niu, Shanyuan; Smith, Matthew D.; Ewing, Rodney C.; Jia, Chunjing; Karunadasa, Hemamala I.; Mao, Wendy; Lin, Yu | Our results present a promising approach to prepare superb stable black CsPbI 3 for perovskite solar cells. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1886 | Monitoring Electron−Phonon Interactions in Lead Halide Perovskites Using Time-Resolved THz Spectroscopy | Zhao, Daming; Hu, Hongwei; Haselsberger, Reinhard; Marcus, Rudolph; Michel-Beyerle, Maria-Elisabeth; Lam, Yeng Ming; Zhu, Jian-Xin; La-o-vorakiat, Chan; Beard, Matthew; Chia, Ee Min | Here, we observe a delicate interplay among carriers, phonons, and excitons in mixed-cation and mixed-halide perovskite films by simultaneously resolving the contribution of free carriers and phonons in time-resolved THz photoconductivity spectra. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1887 | Stabilizing Metal-Halide Perovskites via Nanoconfined Crystallization | Kong, Xiaoqing; Lee, Stephanie; Yang, Yi | We explore nanoconfinement as a strategy to shift the thermodynamics of polymorph transitions in order to stabilize high-performance phases against temperature-induced polymorph transitions and humidity-induced degradation. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1888 | Dimensional Confinement-Deconfinement Along the Crystallographic C Axis: A Desorption Mediated Band Engineering of Methylammonium Lead Iodide | SASMAL, SAYANTAN | In this report, we demonstrate band gap engineering of MAPbI 3 film due to systematic dimensional deconfinement along the crystallographic c axis during gas induced growth. | Session 126: Structure and Crystallography of Halide Perovskites |
| 1889 | Planar Hall effect in thin films of the 3D Dirac semimetal Cd3As2 | Goyal, Manik; Schumann, Timo; Kealhofer, David; Stemmer, Susanne | In this talk, we will discuss our measurements of the PHE in (001) and (112) oriented epitaxial thin films of Cd 3As 2 having a wide range of film thicknesses. | Session 127: Weyl Semimetal, Transport |
| 1890 | NMR Investigation of Field-Induced Energy Gap in Topological Node-Line Semimetal ZrGeSe | Wu, Guoqing; Wan, Shengtang; Cao, Rongxing; Hu, Jian; Zeng, Xianghua; Xu, yafang; Zhang, Jinbo; Wang, Lin; Wang, Qiuliang; Guo, Lei; Zheng, Renkui; Wu, Bing | Here we report NMR investigation of field-induced energy gap in topological nodal-line semimetals of ZrGeSe single crystals, with high magnetic field up to 16 T and high hydrostatic pressure up to 50 GPa. | Session 127: Weyl Semimetal, Transport |
| 1891 | Violation of Ohm`s law in a Weyl metal | Shin, Dongwoo; Kim, Jeehoon | In this presentation, by transportation experiment besides negative longitudinal magneto resistance, we observed ohm’s law was broken in the Weyl metal and carried experimental and theoretical analysis of the violation of ohm`s law [1]. | Session 127: Weyl Semimetal, Transport |
| 1892 | Interplay of Dirac Nodes and Volkov-Pankratov Surface States in Compressively Strained HgTe | Mahler, David; Mayer, Julian-Benedikt; Leubner, Philipp; Lunczer, Lukas; Di Sante, Domenico; Sangiovanni, Giorgio; Thomale, Ronny; Hankiewicz, Ewelina; Buhmann, Hartmut; Gould, Charles; Molenkamp, Laurens | We find no evedince for Fermi-arcs, but topological surface states, that are responsible for the transport in the electron regime. | Session 127: Weyl Semimetal, Transport |
| 1893 | Exploring broken time-reversal symmetry in Cd3As2/(Ga,Mn)Sb Dirac semimetal/ferromagnetic semiconductor heterostructures | Mitra, Arpita; Xiao, Run; Samarth, Nitin | In this study, we aim to break time reversal symmetry (TRS) in Cd 3As 2 by interfacing with a ferromagnetic semiconductor, (Ga,Mn)Sb. | Session 127: Weyl Semimetal, Transport |
| 1894 | Negative longitudinal magnetoresistance, anisotropic magnetoresistance, and planar Hall effect in epitaxial thin films of elemental Bismuth | Ark, Eugene; Hong, Deshun; Bretz-Sullivan, Terence; Liu, Changjiang; Zhang, Shulei; Aggarwal, Leena; Madhavan, Vidya; Bhattacharya, Anand | We show NLMR, AMR, and PHE in crystalline epitaxial thin films (< 50 nm) of elemental Bismuth (111) grown by molecular beam epitaxy on intrinsic GaAs (111) substrates. | Session 127: Weyl Semimetal, Transport |
| 1895 | Quantum Hall effect due to surface states in (001)-plane cadmium arsenide thin films | Kealhofer, David; Galletti, Luca; Schumann, Timo; Suslov, Alexey; Stemmer, Susanne | We report transport studies of gated Hall bar structures fabricated from (001)-oriented epitaxial thin films of cadmium arsenide, a three-dimensional Dirac semimetal, in magnetic fields up to 45 T. | Session 127: Weyl Semimetal, Transport |
| 1896 | Anomalous Hall Effect induced by extremely low field in ultra pure ZrTe5 | Mutch, Joshua; Malinowski, Paul; Jiang, Qianni; Liu, Zhaoyu; Xiao, Di; Chu, Jiun-Haw | We report detailed measurements of the anomalous hall effect (AHE) in ultra-pure, high mobility bulk ZrTe 5. | Session 127: Weyl Semimetal, Transport |
| 1897 | Epitaxial Growth and in-situ magneto-transport of Na3Bi – a 3D Dirac semimetal | Peirce, Dana; Pinchuk, Igor; Muzzio, Ryan; Singh, Simranjeet; Katoch, Jyoti | In this talk, we will present our results on ultra-thin growth of Na 3Bi films on insulating substrates using molecular beam epitaxy (MBE). | Session 127: Weyl Semimetal, Transport |
| 1898 | Evolution of the electronic structure of the Weyl semimetal TaAs under pressure | Medvecka, Zuzana; Naumann, Marcel; Schmidt, Marcus; Süß, Vicky; Rosner, Helge; Nicklas, Michael; Hassinger, Elena | We studied whether hydrostatic pressure can tune the Weyl node energy in TaAs closer to the Fermi level by the Shubnikov-de Haas effect at pressures up to 2.5 GPa. | Session 127: Weyl Semimetal, Transport |
| 1899 | The chiral qubit: quantum computing with chiral anomaly | Li, Qiang | We propose to utilize the chiral anomaly for the designs of qubits potentially capable of operating at THz frequency and at room temperature with a coherence time to gate time ratio of about 10 4. | Session 127: Weyl Semimetal, Transport |
| 1900 | Matter in Extreme Environments: Novel Chemistry under Pressure | Miao, Maosheng | In this talk, I will outline the novel compounds and the new chemical phenomena within one conceptual framework based on the change of quantum states of electrons under high pressure. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1901 | Theoretical phase diagram of boron carbide BxC from ambient to high pressure (P) and high temperature (T): the “single phase” regime in the light of the density functional theory (DFT) results | JAY, Antoine; Hardouin Duparc, Olivier; Sjakste, Jelena; Vast, Nathalie | We discuss the occurrence of the “single phase regime” in the light of these new results. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1902 | Novel tunable band gap BC8/ST12 SixGex−1 alloys: insights from first-principles calculations | Wagner, Johannes; Nunez Valdez, Maribel | Here we employ ab initio calculations to further investigate the electronic properties of these alloys as a function of x. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1903 | First-Principles Simulation of Strain Effects on Lanthanum Monopnictides | Lin, Chia-Min; Chen, Wei-Chih; Chen, Cheng-Chien | Here, we theoretically investigate strain effects on lanthanum monopnictides LaX (X = N, P, As, Sb, and Bi) by first-principles simulations using hybrid density functionals with spin-orbit coupling. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1904 | A First-Principles Exploration of NaxSy Binary Phases at 1 atm and Under Pressure | Geng, Nisha; Bi, Tiange; Zarifi, Niloofar; Yan, Yan; Zurek, Eva | A First-Principles Exploration of NaxSy Binary Phases at 1 atm and Under Pressure | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1905 | Tuning Magnetic and Electronic Properties in Exotic Silver(II) Fluorides Using Pressure | Grochala, Wojciech; Grzelak, Adam; Gawraczynski, Jakub; Kurzydlowski, Dominik; Mazej, Zoran; Prakapenka, Vitali; Derzsi, Mariana; Struzhkin, Viktor; Barone, Paolo; Lorenzana, Jose | Here I will discuss the behaviour of some of these materials (including doped systems) at elevated pressure conditions as obtained from combined experimental and theoretical studies. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1906 | The change of basic chemical behavior of elements under high pressure | Sun, Yuanhui; Miao, Maosheng | [1] Besides, we found that Hg in Hg-F compounds transfers charge from the d orbitals to F atoms, thus behaving as a transition metal. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1907 | Ultrahigh-pressure induced decomposition of silicon disulfide into high coordination number silicon-sulfur compounds | Chen, Yuanzheng; Feng, Xiaolei; Redern, Simon A. T.; Liu, Hanyu | Here, using an efficient structure search method, we systematic explore the structural evolution of different Si-S stoichiometries up to 250 GPa. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1908 | A novel all-nitrogen molecular crystal as promising high-energy density material | Zhao, Lei; Liu, Shijie; Chen, Yuanzheng; Yi, Wencai; Gu, Fenglong; Zheng, Yonghao; Liu, Bingbing; Miao, Maosheng | In the decades-long search for energy-dense materials capable of greater energy output, many studies have focused on nitrogen rich compounds, which have the advantages of relative stability at ambient conditions, high-energy output when broken down, and a clean gas product (N 2) that is inert, non-toxic, and a non-contributor to the greenhouse effect. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1909 | Structure and Stability of Oxyfluorides and Oxychlorides and Their Relations to Catalytic Activities in Oil Refining Reactions | Khodagholian, Dalar | Structure and Stability of Oxyfluorides and Oxychlorides and Their Relations to Catalytic Activities in Oil Refining Reactions | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1910 | Physical property modulation in 2D TMDs homo- and hetero-structures via pressure engineering | Xia, Juan | In this talk, we demonstrate effective tuning of the excitonic states by controlling the interlayer distance in TMDs vdWs HSs, and further tune the interlayer spacing and thus the band structure using hydrostatic pressure. | Session 128: Matter in Extreme Environments: Novel Chemistry |
| 1911 | Emergent transport properties on the verge of metal-insulator transitions in pyrochlore 5d/4d oxides | Ueda, Kentaro | Here, we report another examples of such states in Pr 2Ir 2O 7, which is known as a paramagnetic Luttinger semimetal. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1912 | Multiorbital effects in Sr2IrO4 under an external field | Engström, Lena; Pereg-Barnea, Tami; Witczak-Krempa, William | We use a multiple order parameter, self-consistent mean-field approach to explore the relevance of multiorbital effects to possible exotic phases in Sr 2IrO 4 in an external magnetic field. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1913 | Electrical resistivity relaxation under uniaxial strain in BaIrO3 at room temperature | Siegfried, Peter; Zhao, Hengdi; Cao, Gang; Lee, Minhyea | We investigate the 5 d transition metal oxide BaIrO 3, in which the ground state is strongly dependent on the corner sharing Ir-O-Ir buckling angle between the face sharing octahedral trimers. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1914 | In-situ anisotropic strain controlled metamagnetism of Sr2IrO4 by pseudo-Jahn-Teller distortion | Zhang, Han; Hao, Lin; Yang, Junyi; Mutch, Joshua; Liu, Zhaoyu; Huang, Qing; Noordhoek, Kyle; May, Andrew; Chu, Jiun-Haw; Kim, Jong Woo; Ryan, Philip; Zhou, Haidong; Liu, Jian | In this study, we drove the metamagnetic transition of Sr 2IrO 4 bulk crystal into distinct regimes by applying in-situ anisotropic strain. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1915 | Thickness Dependent Magnetic Reversal in Sr4Ru3O10 Nanosheets | Liu, Yan; Yang, Jiyong; Mao, Zhiqiang; Cao, Gang; Tian, Mingliang | Here, we investigated the thickness-dependent anisotropic magnetoresistance (AMR) of pure and 2% Fe-doped Sr 4Ru 3O 10 nanosheets. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1916 | Transport phenomena in ultraclean 111 oriented SrVO3 thin films | Roth, Joseph; Kuznetsova, Tatiana; Engel-Herbert, Roman | We compare the temperature dependent electronic transport properties of (111) and (001) oriented SrVO 3 thin films. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1917 | Growth and Characterization of Heterostructures of Ferromagnetic SrRuO3 and Superconducting Sr2RuO4 by Molecular-Beam Epitaxy | Schreiber, Nathaniel; Nair, Hari; Ruf, Jacob; Miao, Ludi; Goodge, Berit; Kourkoutis, lena; Shen, Kyle; Schlom, Darrell | In this talk, we describe the growth of SrRuO 3/Sr 2RuO 4 heterostructures using oxide molecular-beam epitaxy. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1918 | Intrinsic tunable anomalous Hall effect induced by momentum-space Berry curvature in SrRuO3 | Sohn, Byungmin; Lee, Eunwoo; Oh, Ji Seop; Kyung, Wonshik; Yoo, Hanyoung; Yang, Bohm-Jung; Kim, Changyoung | Recently, we observed an abnormal behavior of AHE in SRO ultrathin films. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1919 | Spectroscopic study on band evolution and formation of relativistic Mott insulating phase in Ir doped Sr2RuO4 | Kwon, Junyoung; Kim, Beom Seo; Denlinger, Jonathan; Bostwick, Aaron; Rotenberg, Eli; Choi, Young Jai; Kyung, Wonshik; Kim, Changyoung | Recent research showed 4d, 5d transition metal oxide provides rich novel physical properties. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1920 | Spectroscopic evidence for electron-boson coupling in electron-doped Sr2IrO4 | Hu, Yong; Chen, Xiang; Peng, Shuting; Lane, Christopher; Matzelle, Matthew; Sun, Zeliang; Hashimoto, Makoto; Lu, Donghui; Schwier, Eike; Arita, Masashi; Wu, Tao; Markiewicz, Robert; Shimada, Kenya; Chen, Xianhui; Shen, Zhixun; Bansil, Arun; Wilson, Stephen; He, Junfeng | Here, we report spectroscopic evidence for the presence of the third key player in electron-doped Sr 2IrO 4: electron-boson coupling. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1921 | Relaxation Dynamics at High-symmetry Points in Sr2IrO4 through Time- and Angle-resolved Photoemission Spectroscopy | Choi, Dongsung; Azoury, Doron; Baldini, Edoardo; Lyu, Baiqing; Zong, Alfred; Porter, Zach; Wilson, Stephen; Gedik, Nuh | Pioneering studies have shown that chemical doping modifies the electronic band structure in electron-doped Sr 2IrO 4. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1922 | Magnetic-field-dependent second-harmonic generation study of Sr2IrO4 | Seyler, Kyle; De la Torre, Alberto; Porter, Zach; Cao, Gang; Wilson, Stephen; Hsieh, David | In this talk, we will present magnetic-field-dependent SHG rotational anisotropy and microscopy studies that further elucidate the nature of this hidden state. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1923 | Raman measurements on Sr2IrO4 grown in magnetic field | Pellatz, Nick; Reznik, Dmitry; Cao, Gang | Here I will present a comparison of Raman scattering data from normal and field-grown Sr 2IrO 4. | Session 129: Metal-Insulator transition in 4d/5d oxides |
| 1924 | Atomic resolution characterization of 2D materials with scanning transmission electron microscopy. | Alem, Nasim | Atomic resolution characterization of 2D materials with scanning transmission electron microscopy. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1925 | Using Intercalation Chemistry to Change Interlayer Spacing and Resulting Bandgap of Two-Dimension Materials | Smith, Andrew; Kattel, Subash; Hecht, Zachary; Wladkowski, Henry; Murphy, Joseph; Rice, WIlliam; Hulley, Elliott; Ackerman, John; Leonard, Brian | We are exploring one such material, WO 2Cl 2, and what role interlayer spacing plays in the bandgap of 2D materials. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1926 | Realization of 2D Crystalline Metal Nitrides via Selective Atomic Substitution | Cao, Jun; Li, Tianshu; Gao, Hongze; Ling, Xi | Here, we report the synthesis of few-nanometer thin Mo 5N 6 crystals with satisfactory area and quality via chemical conversion of layered MoS 2 crystals. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1927 | Step edge-mediated assembly of periodic arrays of long graphene nanoribbons on Au(111) | Lu, Wenchang; Ma, Chuanxu; Xiao, Zhongcan; Huang, Jingsong; Hong, Kunlun; Li, An-Ping; Bernholc, Jerry | — You studied adsorption energies instead of electronic properties in this paper, correct? | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1928 | Preparation and growth of sulfide heterostructure thin films from designed precursors | Roberts, Dennice; Gorman, Brian; Perkins, John; Zakutayev, Andriy; Bauers, Sage | Here we present the first crystalline sulfide heterostructure prepared using this precursor approach, forming superlattices with a tunable number of SnS layers sandwiched between monolayers of TaS 2. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1929 | Experimental demonstration of partial van der Waals screening by mono- and double-layer MoSe2 and MoS2 | Tsoi, Stanislav; Sivaram, Saujan; Rosenberger, Matthew; McCreary, Kathleen; Chuang, Hsun-Jen; Jonker, Berend | Experimental demonstration of partial van der Waals screening by mono- and double-layer MoSe2 and MoS2 | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1930 | Graphene growth on non-metallic substrates by Chemical Vapor Deposition | Rodriguez Villanueva, Sandra; Instan, Alvaro; Mendoza, Frank; Weiner, Brad; Katiyar, Ram; Morell, Gerardo | In this work, we show the direct synthesis of graphene on SiO 2/Si and SiC by hot-filament chemical vapor deposition. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1931 | Direct growth of twisted bilayer graphene with controllable twist angle by plasma-enhanced chemical vapor deposition | Wang, Jiaqing; Chen, Yen-Chun; Lin, Wei-Hsiang; Tseng, Wei-Shiuan; Chen, Chii-Dong; Wu, Yu-Shu | We report a direct plasma-enhanced chemical vapor deposition (PECVD) method to grow single crystalline bilayer graphene (BLG) flakes and mm-size BLG films with the interlayer twist angle controlled by the growth parameters. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1932 | 2D platinum diselenides grown on 3D wide-bandgap substrates by Van der Waals epitaxy | Lin, Chia-Her; Stockert, Edward; Chang, Ching-Wen; Chen, Ting; Kuo, Chien-Chen; Lu, Yi-Ying; Tu, Li-Wei; Chen, Quark; Wadekar, Paritosh | In this work, ultrathin films of Pt were first deposited by magnetron sputtering on the GaN, AlN and Al2O3 substrates followed by atmospheric pressure chemical vapor deposition (APCVD). | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1933 | Facile Production of Macroscopic Single Crystal Monolayers and Artificial Lattices of 2D van der Waals Materials | Liu, Fang; Wu, Wenjing; Bai, Yusong; Chae, Sanghoon; Li, Qiuyang; Wang, Jue; Hone, James; Zhu, Xiaoyang | Here we report a facile method to disassemble vdW single crystals layer-by-layer into monolayers with near-unity yield and with macroscopic dimensions limited only by bulk crystal sizes. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1934 | Automated Vacuum Stacking for Additive Assembly of 2D van der Waals Heterostructures | Ye, Andrew; Mannix, Andrew; Mujid, Fauzia; Park, Chibeom; Park, Jiwoong | Using wafer-scale synthesized 2D semiconductors along with large-area patterning and multi-functional polymer stamps, we demonstrate a highly automated, dry-transfer, additive assembly process. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1935 | Impact of thermal treatment on graphene films synthesized via interfacial trapping technique | Chahid, Sara; Dulal, Rajendra; Teknowijoyo, Serafim; Rzhevskii, Alexander; Gulian, Armen | Large variety of graphene applications in science and technology justify different methods to obtain pure graphene films. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1936 | Fabrication and Imaging of Monolayer Phosphorene with Preferred Edge Configurations via Graphene-Assisted Layer-by-Layer Thinning | Lee, Yangjin; Lee, Sol; Yoon, Jun-Yeong; Cheon, Jinwoo; Jeong, Hu Young; Kim, Kwanpyo | Our study provides invaluable approach to manipulate the thickness and image beam-sensitive 2D materials. | Session 130: Synthesis and Characterizations Large Scale of 2D Materials |
| 1937 | Probing inhomogeneous superconductivity and magnetism in complex oxide heterostructures with scanning SQUID | Noad, Hilary | I will discuss two studies which used scanning superconducting quantum interference device (SQUID) microscopy, a local magnetic probe, to investigate the effects of intrinsic or controlled inhomogeneity in complex oxide heterostructures. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1938 | Cryogenic Piezoforce Microscopy of Sketched LaAlO3/SrTiO3 Nanostructures | Albro, Joseph; Montone, Jessica; Bi, Feng; Huang, Mengchen; Lee, Jung-Woo; Lee, Hyungwoo; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | Here we detail our efforts to reveal electron transport in “sketched” LaAlO 3/SrTiO 3 nanostructures [3] using a modified vacuum AFM at room and low (T < 25 K) temperatures. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1939 | Dependence of LaAlO3/SrTiO3 Electron Pairing Strength on Crystallographic Orientation | Nethwewala, Aditi; Lee, Hyungwoo; Li, Jianan; Briggeman, Megan; Zhang, Yuze; Wang, Tianyi; Lee, Jung-Woo; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | Here, we investigate the nature of the pairing mechanism in LaAlO 3/SrTiO 3 nanostructures by examining the electron pairing strength with respect to the crystallographic direction. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1940 | Transport properties of non-reciprocal 1D quantum channels at the LaAlO3/SrTiO3 interface | Zhang, Yuze; Wang, Tianyi; Briggeman, Megan; Lee, Hyungwoo; Lee, Jungwoo; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | We create chiral 1D superlattices at the LaAlO3/SrTiO3 interface by adding a periodic modulation to an electron waveguide device. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1941 | Nanoscale control of the metal-insulator transition in free-standing LaAlO3/SrTiO3 membranes | Yu, Muqing; Eom, Kitae; Yang, Dengyu; Lee, Jung-Woo; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | We describe a method for achieving free-standing single-crystal LaAlO 3/SrTiO 3 membranes by etching away a sacrificial SrRuO 3 layer underneath SrTiO 3. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1942 | Influence of Temperature on LaAlO3/SrTiO3 Nanowire Lifetimes Under Ambient Conditions | Greenberg, Aaron; Shenk, Philip; Albro, Joseph; Yu, Muqing; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | Here we describe experiments detailing efforts to quantify the device lifetimes as a function of temperature under otherwise ambient conditions, which will aid in the creation of new, more complex devices. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1943 | Surface Acoustic Wave Generation and Detection on LaAlO3/SrTiO3 | Yang, Dengyu; Pai, Yun-Yi; Tang, Yuhe; Yu, Muqing; Hu, Yang; Lee, Hyungwoo; Lee, Jung-Woo; Eom, Kitae; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | We aim to generate and detect surface acoustic waves (SAW) in LaAlO 3/SrTiO 3 heterostructures. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1944 | Creating nano-scale “vias” in LaAlO3/SrTiO3 for integration of nanostructures | Wilson, Carl; Nethwewala, Aditi; Sheridan, Erin; Irvin, Patrick; Levy, Jeremy | Here, we discuss methods to create nanoscale holes or “nano vias” in LaAlO 3/SrTiO 3 with the goal of integrating nanomaterials directly to interface while maintaining interfacial conductivity. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1945 | Interface band engineering in LaAlO3/SrTiO3 heterostructures | Sing, Michael; Gabel, Judith; Scheiderer, Philipp; Zapf, Michael; Stübinger, Martin; Schlueter, Christoph; Lee, Tien-Lin; Claessen, Ralph | We demonstrate that these properties can be effectively engineered in LaAlO 3 /SrTiO 3 by virtue of the oxygen vacancy concentration. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1946 | Character of the insulator-metal transition at the LaAlO3/SrTiO3 interface | Bennett, Daniel; Artacho, Emilio; Bristowe, Nicholas | We will present a theoretical analysis showing a richer phenomenology than expected so far, with the possibility of either continuous or discontinuous transitions, including a situation in which there is a second discontinuous transition with a jump in carrier concentration after an earlier continuous metal-insulator one. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1947 | Giant nonreciprocal charge transport in noncentrosymmetric LaAlO3/SrTiO3 interfaces | Choe, Daeseong; Jin, Mi-JIn; Kim, Shin-Ik; Choi, Hyung-Jin; Jo, Junhyeon; Oh, Inseon; Park, Jungmin; Jin, Hosub; Koo, Hyun Cheol; Min, Byoung-Chul; Hong, Suk-Min; Lee, Hyun-Woo; Baek, Seung-Hyub; Yoo, Jung-Woo | Here, we present giant gate-tunable nonreciprocal charge transport in the LaAlO 3/SrTiO 3 conductive oxide interface, where the electrons are confined at two-dimension with low Fermi energy. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1948 | High-mobility two-dimensional hole gas at the SrTiO3 interface formed by depositing an ultrathin metal film at room temperature | Kaneta, Shingo; Duc Anh, Le; Tokunaga, Masashi; Seki, Munetoshi; Tabata, Hitoshi; Tanaka, Masaaki; Ohya, Shinobu | Here, we demonstrate a very simple method to realize a 2DHG with an ultrahigh mobility of 24,000 cm 2V –1s –1 at an STO interface. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1949 | Shubnikov-de Hass oscillations to the quantum limit in (111) oriented SrTiO3 interface 2D electron gas | Wang, Ziqiao; Heltman, Autumn; Kumari, Shalini; Li, Qi; Chikara, Shalinee; Suslov, Alexey; Balakirev, Fedor; Singleton, John | We created a 2D electron gas at SrTiO3 (111) interfaces with high mobility over 15000 cm 2V -1s -1 at low temperatures. | Session 131: Two-Dimensional Electron gas in STO-based Heterostructures |
| 1950 | THz spectroscopy of BiFeO3 in the magnetic-field-induced canted AFM state. | Viirok, Johan; Peedu, Laur; Nagel, Urmas; Room, Toomas; Szaller, Dávid; Kocsis, Vilmos; Bordacs, Sandor; Kezsmarki, Istvan; Engelkamp, Hans; Kamensky, Dima; Thirunavukkuarasu, Komalavalli; Ozerov, Mykhaylo; Smirnov, Dmitry; Krzystek, Jurek; Ozaki, Yukihiro; Ito, Toshimitsu; Tomioka, Yasuhide; Datta, Trinanjan; Fishman, Randy | Here we present the THz spectroscopy results for three different magnetic field orientation, parallel to hexagonal c axis, perpendicular and parallel to a axis, measured on the single FE domain crystals grown by the laser-diode heating floating-zone method [T. Ito et al., Cryst. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1951 | Magnetoelectric spectroscopy of spin excitations in LiCoPO4 | Room, Toomas; Viirok, Johan; Peedu, Laur; Nagel, Urmas; Bordacs, Sandor; Kezsmarki, Istvan; Kocsis, Vilmos; Tokunaga, Yusuke; Taguchi, Yasujiro; Tokura, Yoshinori | In this work [V. Kocsis et al., PRB 100, 155124 (2019)] we study optical magnetoelectric (ME) effect using optical directional anisotropy as measured by the THz absorption spectroscopy of spin resonances in LiCoPO 4. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1952 | Model for the Spin Dynamics of the Multiferroic (NH4)2FeCl5 (H2O) | Fishman, Randy; Tian, Wei; Fernandez-Baca, Jaime; Musfeldt, Janice; Lee, Jun Hee; Lee, Minseong; Singleton, John | We evaluate the magnetic interactions in the multiferroic erythrodsiderite (NH 4) 2FeCl 5 (H 2O) by comparing inelastic neutron scattering spectra of a single crystal sample with a simple Heisenberg model containing five exchange interactions and an easy-plane anisotropy. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1953 | Tunable Magnetic and Ferroelectric Order Parameters in Sr1-xBaxMn1-yTiyO3 | Chmaissem, Omar; Chapagain, Kamal; Haberl, Bianca; Lynn, Jeffrey; Lapidus, Saul; Kenney-Benson, Curtis; Dabrowski, Bogdan; Rosenkranz, Stephan | In this talk, I will discuss the recent development of single-site manganese-based multiferroic perovskite materials, Sr 1-xBa xMn 1-yTi yO 3, with ferroelectric transition temperatures boosted to ~430 K. Using a series of temperature-dependent scattering experiments at various pressures, we demonstrate the tunable character of coupling between the magnetic and ferroelectric order parameters and show that ferroelectricity could be easily manipulated through the application of either external or chemical pressures. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1954 | Insights into the coupled phenomena in molecular multiferroic (ND4)2[FeCl5(D2O)] via inelastic neutron scattering studies | Tian, Wei; Fishman, Randy; Cao, Huibo; Sala, Gabriele; Pajerowski, Daniel; Hong, Tao; Daemen, Luke; Cheng, Yongqiang; Fernandez-Baca, Jaime | Our data analysis shows the spin dynamics can be described by a Heisenberg Hamiltonian model with an easy-plane anisotropy that captures the key observations. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1955 | Magnetization reversal by electric field in Co substituted bismuth ferrite thin film | Azuma, Masaki; Shimizu, Keisiuke; Shigematsu, Kei; Hojo, Hajime | We have observed a spin structure transition from low-temperature cycloidal one to high-temperature collinear one at ~200 K using Mössbauer spectroscopy in rhombohedral BiFe 0.1Co 0.9O 3 thin films fabricated by PLD on SrTiO 3 (STO) (111) substrate. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1956 | Spin-liquid-like state in ferroelectric TbInO3 with a nearly triangular lattice | Kiryukhin, Valery | We describe a recently-discovered QSL candidate TbInO 3, containing nearly-triangular layers of non-Kramers Tb 3+ ions. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1957 | An annealing study of CaMn2O4-d, a possible multiferroic candidate | Gooch, Melissa; Wu, Hung-Cheng; Deng, Liangzi; Yang, Hung-Duen; Chu, Paul C. W. | From initial dc magnetization and C p measurements, the previously report T N ~ 220 K was observed for both samples. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1958 | Pressure effect on multiferroics investigation with neutron scattering | Wu, Yan; Tian, Wei; Cao, Huibo | We studied systems mainly with neutron scattering techniques in identifying their magnetic phase transitions under pressures to provide understanding for change of the ferroelectric properties in the system. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1959 | Magnetostructural domain wall patterning in ferrimagnetic spinels | Kish, Lazar; Aczel, Adam; DeBeer-Schmitt, Lisa; Thaler, Alexander; Reig-i-Plessis, Dalmau; Zakrzewski, Alexander; MacDougall, Greg | I will show small angle neutron scattering data associating these features with known first order magnetic transitions in these materials, and their control via applied magnetic field. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1960 | Large and highly anisotropic magnetocaloric effects in disordered-perovskite RCr0.5Fe0.5O3 single crystals (R = Gd, Er) | Shin, Hyunjun; Kim, JongHyuk; Oh, Donggun; Choi, Young Jai; Lee, Nara | We have successfully synthesized the disordered-perovskite RCr 0.5Fe 0.5O 3 (R=Gd, Er) single crystals which crystallize in an orthorhombic Pbnm structure, and investigated anisotropic magnetic and magnetocaloric properties. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1961 | An ab initio Study of Oxygen Vacancies in Ba2CuO4 and Sr2CuO4 | Matzelle, Matthew; Lane, Christopher; Markiewicz, Robert; Bansil, Arun | Using state-of-the-art ab initio techniques, we systematically examine the energy landscape and electronic structure of oxygen vacancies in Ba 2CuO 4 and Sr 2CuO 4. | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1962 | THz spectroscopy of spin excitations in magnetoelectric LiCoPO4 in high magnetic fields | Peedu, Laur; Room, Toomas; Viirok, Johan; Nagel, Urmas; Bordacs, Sandor; Kocsis, Vilmos; Tokunaga, Yusuke; Taguchi, Yasujiro; Tokura, Yoshinori; Engelkamp, Hans; Zeitler, Uli; Kezsmarki, Istvan | THz spectroscopy of spin excitations in magnetoelectric LiCoPO4 in high magnetic fields | Session 132: Multiferroics and Magnetoelectricity in Complex Oxides |
| 1963 | Direct measurement of ion mobility by electrophoretic NMR and implications for correlated migration in liquid electrolytes | Schönhoff, Monika; Schmidt, Florian; Brinkkötter, Marc; Rosenwinkel, Mark; Nürnberg, Pinchas | Direct measurement of ion mobility by electrophoretic NMR and implications for correlated migration in liquid electrolytes | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1964 | Modulation of ion transference number by dynamic hydrogen bond network | bocharova, Vera; Wojnarowska, Zaneta; Erwin, Andrew; Jayakody, Nishani; Greenbaum, Steven; Popov, Ivan; gainaru, catalin; Cheng, Shiwang | In the present talk, we demonstrate that addition of small nanoparticles capable of formation of hydrogen bonds can reduce electrostatic interaction between ions in IL which improves ion dissociation. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1965 | Ionic Association, Solvation and Gelation in Super-Concentrated Electrolytes | McEldrew, Michael; Bi, Sheng; Goodwin, Zachary; Kornyshev, Alexei; Bazant, Martin | We developed a thermodynamic model of reversible ionic association and gelation in super-concentrated electrolytes accounting for the competition between ion solvation and ion association. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1966 | Unsupervised learning of ion dynamics in electrolytes using graph dynamical networks | Xie, Tian; France-Lanord, Arthur; Wang, Yanming; Shao-Horn, Yang; Grossman, Jeffrey | Here we present graph dynamical networks [1], an unsupervised learning approach for atomic scale dynamics in arbitrary phases and environments from molecular dynamics simulations. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1967 | Ion clustering in electrolytes: impact on correlated transport and voltage stability | Fadel, Eric; Molinari, Nicola; France-Lanord, Arthur; Kozinsky, Boris; Grossman, Jeffrey | In particular, we develop algorithms to describe conditions for clustering to appear, the nature and composition of these clusters, the distribution in size, composition and diffusion coefficient of clusters during transport. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1968 | Molecular Dynamics Simulations of FcMIM-based Ionic Liquids | Guo, Qing; Lau, Kahchun; Pandey, Ravindra | In this talk, we will present the results of Molecular Dynamics simulations identifying the structural characteristics of the ferrocene-imidazolium-based ionic liquids and their aqueous solutions. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1969 | Adaptive dimensionality reduction for accelerated calculations of ionic conductivity in correlated electrolytes | Molinari, Nicola; Xie, Yu; Leifer, Ian; Kozinsky, Boris | We propose a way to systematically reduce the noise in the conductivity and diffusivity calculations from MD in regimes of moderate correlation (Haven ration 0.5-2). | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1970 | Asymmetric composition of ionic cluster and correlated transference number in water-in-salt electrolytes | Yu, Zhou; Cheng, Lei | In this work, the crosslinked heterogeneous ion and water domains were captured by molecular dynamics (MD) simulations and small-angle X-ray scattering techniques. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1971 | Ion-ion correlations from aggregation and the Nernst-Einstein equation | France-Lanord, Arthur; Grossman, Jeffrey | We present a new approximation [1] to ionic conductivity well suited to dynamical atomic-scale simulations, based on the Nernst-Einstein equation. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1972 | Transport anomalies in electrolytes emerging from strong ionic correlation | Molinari, Nicola; Mailoa, Jonathan; Kozinsky, Boris | Here we present molecular dynamics analysis of transport properties in IL-based electrolytes. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1973 | Exploring the ion solvation environments in solid-state polymer electrolytes at different concentrations through free-energy sampling. | Sundarararaman, Siddharth; Prendergast, David | Accelerated molecular dynamics and free-energy sampling techniques were employed to explore the distribution of solvation cages within these electrolytes, their variation with concentration and hopping between them as a possible mechanism of transport. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1974 | Ion Correlation and Collective Dynamics in Organic Electrolytes and Ionic Liquid Mixtures: From Dilute Solutions to the Ionic Liquid Limit | Son, Chang Yun; McDaniel, Jesse | In this work, we utilize molecular dynamics simulations to characterize ion association and collective ion dynamics in electrolytes composed of binary mixtures of BMIM +BF 4 − and various organic solvents, water, and LiTFSI salt. | Session 133: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1975 | Evidence for heterogeneous bulk melting dominating the transition of organic stable glasses | Gonzalez-Silveira, Marta; Vila-Costa, Ana; Rodríguez-Lopez, Marta; Lopeandía, Aitor; Rodriguez-Viejo, Javier | The low stability of conventional glasses, obtained by cooling down a melted material, have determined for years how we study glass dynamics, focused basically on the aging regime, i.e., performing isothermal treatments below the limiting fictive temperature (T f) of the glass, allowing the glass to evolve towards a more stable configuration. | Session 134: Molecular and Polymer Glass Dynamics |
| 1976 | Solvent vapor annealing of stable glasses | Govind, Shivajee; Zhao, Haoqiang; Walsh, Patrick; Fakhraai, Zahra | We have introduced a novel and indirect method of measuring the dynamics of SG using solvent vapor annealing (SVA). | Session 134: Molecular and Polymer Glass Dynamics |
| 1977 | Secondary Dynamics in Ultrastable Polystyrene Thin Films Studied by β-NMR | McKenzie, Iain; Cordoni-Jordan, Danaan; Fujimoto, Derek; Karner, Victoria; Kiefl, Robert; Levy, Philip; MacFarlane, W; McFadden, Ryan; Morris, Gerald; Pearson, Matt; Raegen, Adam; Ticknor, John; Forrest, James | We have used β-NMR to study the temperature dependence of the secondary γ-relaxation process in an ultrastable PS film and a normal PS film that was produced by rejuvenating an ultrastable film by heating to T g+25 K for 2 minutes. | Session 134: Molecular and Polymer Glass Dynamics |
| 1978 | Uncovering β-relaxations in amorphous phase-change materials | Wei, Shuai; Peng, Si-Xu; Cheng, Yudong; Pries, Julian; Yu, Hai-Bin; Wuttig, Matthias | Here, instead of bulk samples, we use powder mechanical spectroscopy for powder samples to detect the prominent excess wings – a characteristic feature of β-relaxations – in a series of amorphous PCMs at temperatures below the glass transition. | Session 134: Molecular and Polymer Glass Dynamics |
| 1979 | A direct static scattering evidence on the dynamic nature of glass formation process in polystyrene | Cheng, He; Jiao, Guisheng; Zuo, Taisen; Ma, Changli; Han, Zehua; Zhang, Junrong; Zhao, Junpeng; Han, Charles | A direct static scattering evidence on the dynamic nature of glass formation process in polystyrene | Session 134: Molecular and Polymer Glass Dynamics |
| 1980 | Effects of aromatic side-group structure on thermal transitions of polyzwitterions | Clark, Andrew; Biswas, Yajnaseni; Asatekin, Ayse; Taylor, Morgan; Panzer, Matthew; Schick, Christoph; Cebe, Peggy | In this study we are using fast scanning calorimetry to investigate how aromatic structures in the side-group alters the glass formation of polyzwitterions. | Session 134: Molecular and Polymer Glass Dynamics |
| 1981 | Rigorous analysis of the linear viscoelastic behavior of thermo-rheologically complex amorphous materials | Medvedev, Grigori; Caruthers, James | We propose a different approach where all processes have the same strength, but the corresponding relaxation times are dictated by the data. | Session 134: Molecular and Polymer Glass Dynamics |
| 1982 | Relaxation processes in polymer glasses: a hierarchical approach | Olmsted, Peter; Baker, Daniel; Reynolds, Matthew; Mattsson, Johan; Masurel, Robin | Here, we present experimental results of the M-dependence of both the structural (alpha) relaxation process, which controls the glass transition, and faster (beta and gamma) secondary relaxation processes for a range of polymers of varying chain flexibility. | Session 134: Molecular and Polymer Glass Dynamics |
| 1983 | Unusual Viscoelasticity in Polyrotaxane Glasses | Dikshit, Karan; Bruns, Carson | This work characterizes the viscoelastic properties of glasses made from polyrotaxanes, a class of mechanically interlocked polymers possessing a bead-on-a-string structure. | Session 134: Molecular and Polymer Glass Dynamics |
| 1984 | Volume recovery and physical aging of pressure-densified glasses | Fragiadakis, Daniel; Holt, Adam; Roland, Charles | Using molecular dynamics simulations of a simplified model of TNB, we show that the effects of vitrification pressure and subsequent volume recovery and aging of the glass are comparable to experimental results for real TNB. | Session 134: Molecular and Polymer Glass Dynamics |
| 1985 | Understanding aging phenomena by the free-energy-landscape approach | Odagaki, Takashi | Exploiting the free-energy-landscape (FEL) theory[1], which explains dynamic and thermodynamic properties of non-equilibrium systems in a unified frame work, I argue the physical origin of the aging phenomena for the first time. | Session 134: Molecular and Polymer Glass Dynamics |
| 1986 | Lifetime of Rate Domains: Comparison of Simulations and Single-Molecule Experiments in o-Terphenyl | Kaur, Harveen; Paeng, Keewook; Kaufman, Laura; Berg, Mark | Lifetime of Rate Domains: Comparison of Simulations and Single-Molecule Experiments in o-Terphenyl | Session 134: Molecular and Polymer Glass Dynamics |
| 1987 | Unified description of the Arrhenian and super-Arrhenian behavior of OTP by the excess internal energy model | Caruthers, James; Yungbluth, Jack; Medvedev, Grigori; Savoie, Brett | Unified description of the Arrhenian and super-Arrhenian behavior of OTP by the excess internal energy model | Session 134: Molecular and Polymer Glass Dynamics |
| 1988 | Localized and collective magnetic excitations in the magnetic topological insulator Sn1-xMnxTe | McQueeney, Robert; Vaknin, David; Pakhira, Santanu; Pajerowski, Daniel; Johnston, David; Schlagel, Deborah | We studied the magnetic excitations in a prototypical MTI, Sn 0.95Mn 0.05Te, using inelastic neutron scattering. | Session 135: Magnetic Topological Insulators |
| 1989 | Topological insulator interfaced with ferromagnetic insulators: Bi2Te3 thin films on magnetite and iron garnets | Wu, Chi-Nan; Pereira, Vanda; Altendorf, Simone; Liao, Sheng-Chieh; Liu, Cheng-En; Komarek, Alexander; Guo, Mengxin; Lin, Hong-Ji; Chen, Chien-Te; Hong, Minghwei; Kwo, Jueinai; Tjeng, Liu | We observed the anomalous Hall effect on these heterostructures. | Session 135: Magnetic Topological Insulators |
| 1990 | Tailoring Hybrid Anomalous Hall Response in Engineered Magnetic Topological Insulator Heterostructures | Chen, Peng; Zhang, Yong; Yao, Qi; Hesjedal, Thorsten; Zhang, Shilei; Kou, Xufeng | In this talk, we will present the MBE growth and exotic transport properties of Bi2Te3/MnTe heterostructures. | Session 135: Magnetic Topological Insulators |
| 1991 | Molecular Beam Epitaxy Growth and Magnetization Characterization of Fe-doped Bi2Se3 | Ren, Zheng; Zhao, He; Li, Hong; Rachmilowitz, Bryan; Zeljkovic, Ilija | We grow Fe-doped Bi 2Se 3 thin films on SrTiO 3(001) substrates by molecular beam epitaxy (MBE), and characterize them using a combination of low-temperature scanning tunneling microscopy/spectroscopy (STM/S) and magnetization measurements. | Session 135: Magnetic Topological Insulators |
| 1992 | Optically manipulating ferromagnetism in Cr-doped topological insulators (TIs) | Llanos, Adrian; Chen, Chien-Chang; Teague, Marcus; Che, Xiaoyu; Zhang, Peng; Pan, Lei; Wang, Kang; Yeh, Nai-Chang | Using a combination of optically-enabled transport measurements and scanning tunneling spectroscopic (STS) measurements in the presence of circularly polarized (CP) light, we found an enhancement of magnetization in 10% Cr-doped (Bi xSb 1-x) 2Te 3 bilayer heterostructures which consisted of a pure layer (Bi xSb 1-x) 2Te 3 on top of a 10% Cr-doped (Bi xSb 1-x) 2Te 3 layer. | Session 135: Magnetic Topological Insulators |
| 1993 | Magneto-transport properties of bulk-insulating topological insulators (Bi,Sb)2Te3 on thulium iron garnets | Chen, Chun-Chia; Yang, Shang Rong; Fanchiang, Yu-Ting; Zou, Wei-Jhih; Guo, Mengxin; Cheng, Chao-Kai; Huang, Sheng-Wen; Lin, Keng-Yung; Chen, Ko-Hsuan; Hong, Minghwei; Kwo, Jueinai | We observed anomalous Hall effect up to 300K accompanied by suppressed weak anti-localization. | Session 135: Magnetic Topological Insulators |
| 1994 | High-temperature ferromagnetic topological crystalline insulating state induced by proximity effect in a EuS/SnTe heterostructure | Akiyama, Ryota; Watanabe, Kazuki; Tomohiro, Yuta; Shimano, Takeru; Ishikawa, Ryo; Akutsu, Kazuhiro; Iida, Kazuki; Kuroda, Shinji; Hasegawa, Shuji | We made and measured a EuS/SnTe heterostructure. | Session 135: Magnetic Topological Insulators |
| 1995 | Ultrafast momentum-resolved study of electron-phonon coupling in an antiferromagnetic topological insulator | Padmanabhan, Haricharan; Stoica, Vladimir; Wang, Huaiyu; Koocher, Nathan; Gu, Mingqiang; Shen, Xiaozhe; Lin, Ming-Fu; Lee, Seng Huat; Mao, Zhiqiang; Lindenberg, Aaron; Wang, Xijie; Rondinelli, James; Gopalan, Venkatraman | In this work, we consider the first discovered intrinsic antiferromagnetic topological insulator, MnBi 2Te 4, a system that is predicted to exhibit the quantum anomalous Hall effect [1]. | Session 135: Magnetic Topological Insulators |
| 1996 | Pressurizing an antiferromagnetic topological insulator candidate | Rosa, Priscila; Thomas, Sean; Bauer, Eric; Thompson, Joe; Ronning, Filip | We have identified Zintl antiferromagnet Eu 5In 2Sb 6 as a candidate material which displays remarkable insulating behavior. | Session 135: Magnetic Topological Insulators |
| 1997 | Spin-to-charge conversion on the edge of quantum spin Hall insulator | Araki, Yasufumi; Misawa, Takahiro; Nomura, Kentaro | We present our theoretical work on dynamical spin-to-charge conversion at the edge of a quantum spin Hall insulator (QSHI), namely a two-dimensional topological insulator with helical edge states. | Session 135: Magnetic Topological Insulators |
| 1998 | Exchange interactions between topological and meta-magnetic insulators | Wang, Ying; Lauter, Valeria; Furdyna, Jacek; Liu, Xinyu; Rokhinson, Leonid | The hallmark of 3D topological insulators(TIs)are topological surface states(TSS)protected by the time-reversal symmetry.One of the important goals is the ability to manipulate surface electron states and to lift the topological protection of TSS for the emergence of novel physical phenomena.Gapping of TSS has been demonstrated in TIs with bulk doping using the magnetic impurities and via exchange coupling to insulating magnetic or antiferromagnetic materials.Here we report an experimental study of exchange coupling in EuSe/Bi 2Se 3 and EuSe/Bi 2Se 3/EuSe heterostructures grown by MBE.Bi 2Se 3 is a typical TI and EuSe is a meta-magnetic insulator with a rich phase diagram of paramagnetic,antiferromagnetic,ferrimagnetic and ferromagnetic phases at low temperatures.Polarized neutron scattering experiments indicate enhanced exchange interaction between EuSe and Bi 2Se 3 and we observe finite in-plane magnetization at the interface even above the Néel temperature (T N~5K) of EuSe.In transport measurement,we observe modulation of longitudinal and Hall resistance as a function of the magnetic field,which may be explained by the formation and re-arrangement of magnetic domains at the interface. | Session 135: Magnetic Topological Insulators |
| 1999 | Characterization of the topological magneto-electric effect in Bi2Se3 topological insulator | Pournaghavi, Nezhat; Pertsova, Anna; Macdonald, Allan; Canali, Carlo | Our study sheds light on the fundamental issue of whether TME in a TI is completely determined by the bulk properties or it can be affected by how time-reversal symmetry is broken at the surfaces. | Session 135: Magnetic Topological Insulators |
| 2000 | Electrically Tunable Anomalous Hall Effect in Topological Crystalline Insulator Films | Deng, Peng; Zhang, Peng; Che, Xiaoyu; Wang, Kang-Lung | Here we report the observation of magnetic proximity effect in heterostructures formed by the SnTe (111) and 2 quintuple layers thick Cr-doped (BiSb) 2Te 3 (CBST). | Session 135: Magnetic Topological Insulators |
| 2001 | Large-Gap Quantum Anomalous Hall effect in a Magnetically doped Type-I Topological Heterostructure | Pham, Anh; Ganesh, Panchapakesan | We find Sb 2Te 3 to form a type-I interface with Cr 2O 3l, thereby making the heterostructure insulating, meanwhile maximizing the Zeeman energy due to the segeration of the dopants at the interface, suggesting possible room-temperature QAHE. | Session 135: Magnetic Topological Insulators |
| 2002 | Valley Hall transport and superconductivity signatures in twisted transition metal dichalcogenides | Wang, Ning | Valley Hall transport and superconductivity signatures in twisted transition metal dichalcogenides | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2003 | Topological linkage for thermoelectricity and superconductivity in their nontrivial topological state | Chen, Xiao-Jia; Yu, Hao; Li, Wei-Jian; Chen, Liucheng; Cao, Zi-Yu; Li, Di; Qin, Xiaoying | By choosing an n-type Bi 2Te 2.7Se 0.3, a highly efficient thermoelectric material and topological insulator, we perform measurements of the thermoelectric and superconducting properties at high pressures. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2004 | Theory of Giant In-Plane Critical Field Enhancement in Superconducting Films on a Topological Insulator Surface | Deng, Haoyun; Schlottmann, Pedro; Xiong, Peng; Bonesteel, Nicholas | 1 Here we present a theoretical analysis of this enhancement. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2005 | Characterizing the Superconducting State of CuxBi2Se3 Through Muon-Spin Relaxation/Rotation | Duden, Emily; Frandsen, Benjamin; Kriener, Markus; Ando, Yoichi; Uemura, Yasutomo | Here, we present SR data collected on a single-crystal sample of Cu 0.3Bi 2Se 3. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2006 | In-plane Critical Field far beyond the Paramagnetic Limit for Thin Al Films on Topological Insulator Surface | Lin, Zhu; Li, Zhilin; Deng, Haoyun; Liu, Tianhan; Shi, Gang; Schlottmann, Pedro; Bonesteel, Nicholas; Li, Yongqing; Xiong, Peng | Here we report measurements of the in-plane critical field (H C//) of thin Al, a superconductor with minimal spin-orbit interaction (SOI), on the surface of (Bi 0.5Sb 0.5) 2TeSe 2 (BSTS). | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2007 | Uniaxial-Strain Control of Nematic Superconductivity in SrxBi2Se3 | Kostylev, Ivan; Yonezawa, Shingo; Wang, Zhiwei; Ando, Yoichi; Maeno, Yoshiteru | Here, we report for the first time control of the nematic superconductivity and their domains of Sr xBi 2Se 3, through externally-applied uniaxial stress [3]. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2008 | Doping and pressure effects on Weyl semimetal Mo1-xWxTe2 | Dahal, Rabin; Deng, Liangzi; Poudel, Narayan; Gooch, Melissa; Wu, Zheng; Wu, Hung-Cheng; Yang, Hung-Duen; Chang, Chung-Kai; Chu, Paul C. W. | Doping and pressure effects on Weyl semimetal Mo1-xWxTe2 | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2009 | Theory on superconducting chiral crystal and its applications | Gao, ZheShen; He, Wenyu; Law, Kam Tuen | In this work, we classify the possible pairing phases resulted from chiral lattice symmetry and find various topological superconducting phases. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2010 | Correlation-driven renormalization of Weyl nodes in the Ce-113 series | Ivanov, Vsevolod; Savrasov, Sergey | We study the electronic properties of the inversion-broken CeTX3 (T = Co, Rh, Ir, X=Si,Ge) heavy-fermion materials through a combination of LDA and LDA+Guzwiller methods. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2011 | One-dimensional states residing on edges and steps in few-layer WTe2 | Kononov, Artem; Abulizi, Gulibusitan; Qu, Kejian; Yan, Jiaqiang; Mandrus, David; Watanabe, Kenji; Taniguchi, Takashi; Schonenberger, Christian | Here, we employ the Josephson effect to disentangle the contribution of the hinge states from the bulk in electronic transport. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2012 | Probing Proximity Effect in Topological Insulator/Superconductor Heterostructures | Li, Cequn; Bersch, Brian; Briggs, Natalie; Zhao, Yifan; Dong, Chengye; Bowen, Timothy; Yi, Hemian; Robinson, Joshua; Chang, Cui-Zu; Zhu, Jun | In this work, we synthesize high-quality large-area TI/graphene (Gr)/gallium heterostructures combining confinement epitaxy and molecular beam epitaxy. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2013 | Topological superconductivity in proximitized transition metal dichalcogenide Josephson junctions | Pakizer, Joseph; Matos Abiague, Alex | We theoretically investigate the emergence of topological superconductivity in Josephson junctions (JJ) built of a two-dimensional transition metal dichalcogenide (TMD) layer in proximity to an s-wave superconductor and a magnetic insulator. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2014 | Superconductivity in Cd3As2 thin films | Suslov, Alexey; Davydov, Alexander; Oveshnikov, Leonid; Morgun, Leonid; Kugel, Kliment; Zakhvalinskii, Vasiliy; Pilyuk, Evgeny; Kochura, Alexey; Kuzmenko, Alexander; Ril, Alexey; Marenkin, Sergey; Pudalov, Vladimir; Aronzon, Boris | For the first time we observed superconductivity in Cd 3As 2 thin films without applying external pressure. | Session 136: Topological Superconductivity: 3D TIs, Weyl Semimetals and TMDs |
| 2015 | On the Dynamic Compression of Elements: Phase Transition Lowering in Dynamically-Compressed Silicon | McBride, Emma | Despite being the subject of numerous shock compression studies, the behavior of silicon under dynamic loading is vigorously debated [1-4]. | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2016 | Laser shock induced insulator-metal transition in quasi-one dimensional single-component radical | Hu, Yong; Ren, Shenqiang | Here we found the laser shock induced revisable insulator-metal transition in single-component radical, K-TCNQ[3], where the effect of antiferromagnetic spin ordering causes insulating behavior. | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2017 | Overview of High Pressure Collaborative Access Team (HPCAT) facility at the Advanced Photon Source at Argonne National Laboratory | Velisavljevic, Nenad; Somayazulu, Maddury | Goal of HPCAT is to develop and implement synchrotron-based x-ray techniques that are coupled with diamond anvil cell, portable large volume press, and other platforms for studying materials at extreme pressure-temperature conditions. | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2018 | Crystal Structure and Reflectivity of Laser Ramp-Compressed Sodium | Polsin, Danae; Gong, Xuchen; Crandall, Linda; Huff, Margaret; Boehly, Thomas; Collins, Gilbert; Rygg, James; Eggert, Jon; Jenei, Amy; Millot, Marius; McMahon, Malcolm | We show the highest-pressure solid x-ray diffraction and reflectivity data on Na to date. | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2019 | Neutron Scattering Research on Quantum Materials under Pressure | dos Santos, Antonio | Here we will present the current suite of instrumentation available to research of quantum materials at the SNS, including new developments in instrumentation and pressure devices. | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2020 | Magnetic Structure of the High-Pressure Phases of Holmium | Perreault, Christopher; Vohra, Yogesh; Moreira Dos Santos, Antonio; Molaison, Jamie | Magnetic Structure of the High-Pressure Phases of Holmium | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2021 | Lattice Dynamics of Highly Porous Materials | Ryder, Matthew | 6-8 Spectroscopic techniques such as inelastic neutron scattering (INS), in conjunction with DFT, are used to study the phonon mode dynamics, including those related to gate opening and breathing, 6 trampoline-like mechanisms and molecular rotors reminiscent of negative thermal expansion (NTE), 7,8 and buckling of 2D layers. | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2022 | Impact-induced chemistry and physics through high-energy ball milling | Dera, Przemyslaw | This presentation will also introduce a new project to develop more economical mechanochemical paths towards synthesis of the cubic phase of boron nitride. | Session 137: Matter in Extreme Environments: Advanced Experiments |
| 2023 | Theoretical and Experimental Discovery of Topological Chiral Crystals | Chang, Guoqing; Sanchez, Daniel; Belopolski, Ilya; Cochran, Tyler; Wieder, Benjamin; Schindler, Frank; Yin, Jiaxin; Zhang, Songtian Sonia; Huang, Shin-Ming; Singh, Bahadur; Chang, Tay-Rong; Bansil, Arun; Neupert, Titus; Xu, Suyang; Lin, Hsin; Hasan, Zahid | We present the theory of exotic nonlinear optical responses of topological chiral crystals, including quantized photogalvanic effect in RhSi and robust photocurrents from Fermi arc surface states [G. Chang et al. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2024 | Unconventional Topological Fermions in Orthorhombic RhSi | Mozaffari, Shirin; Aryal, Niraj; Schoenemann, Rico; Chen, Kuan-Wen; McCandless, Gregory; Chan, Julia; Manousakis, Efstratios; Balicas, Luis | Through Density Functional Theory (DFT) calculations, we report that such multi degenerate fermions also exist in α-RhSi, which adopts an orthorhombic structure type (space group No. 62). | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2025 | Ultrasound Studies of the Magnetic Weyl Semimetal Co3Sn2S | Xue, Rui; Kinsler-Fedon, Candice; Musico, Brianna; Yan, Jiaqiang; Keppens, Veerle; Mandrus, David | Here we present Resonant Ultrasound (RUS) measurements on single crystals of Co 3S 2Sn 2 as a function of temperature and magnetic field. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2026 | Epitaxial growth and characterization of topological semimetals from the 2D transition metal dichalcogenides family | Fragkos, Sotirios; Tsipas, Polychronis; Tsoutsou, Dimitra; Sant, Roberto; Alvarez, Carlos; Renaud, Gilles; Okuno, Hanako; Dimoulas, Athanasios | In this work, we show that using molecular beam epitaxy, single and few layers of HfTe 2 [1] and ZrTe 2 [2] can be grown epitaxially on AlN and InAs substrates. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2027 | Epitaxial growth of Kagome semimetal FeSn and Mn3Ge | Hong, Deshun; Jiang, J; Hsiao, Haw-Wen; Zuo, Jian-Min; Liu, Changjiang; Jin, Dafei; pearson, john; Bhattacharya, Anand | Epitaxial growth of Kagome semimetal FeSn and Mn3Ge | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2028 | Magnetotransport properties of Dirac semimetal TaSe3 | Us Saleheen, Ahmad Ikhwan; Chapai, Ramakanta; Xing, Lingyi; Gong, Dongliang; Nepal, Roshan; Young, David; Jin, Rongying | We have investigated the magnetotransport properties of the transition metal trichalcogenide TaSe 3, which is a Dirac semimetal candidate. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2029 | Beyond topology in TaAs | Kealhofer, Robert; Analytis, James | We present thermal and thermodynamic signatures of these strong correlations in the prototypical Weyl semimetal TaAs. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2030 | A non-linear Hall effect at zero field in a chiral nonmagnetic compound | Matsuura, Kohei; Qiu, Mingwei; Mizukami, Yuta; Hashimoto, Kenichiro; Shibauchi, Takasada; Ueno, Teppei; Takahashi, Takeshi; Kobayashi, Kaya; Akazawa, Masatoshi; Fujii, Sakurako; Gouchi, Jun; Yamashita, Minoru; Uwatoko, Yoshiya; Shimozawa, Masaaki | By contrast, the recent studies have proposed that in the nonlinear response regime, a Hall voltage can be observed due to the Berry curvature even in time-reversal invariant systems. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2031 | Topology Classification using Chiral Symmetry: Chiral Zak Phase and Spin Correlations | Jiang, Jingwei; Louie, Steven | Here we develop another approach to use only chiral symmetry (based on chiral Zak phase) to classify 1D materials, which gives an Z classification. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2032 | Anisotropic thermoelectric properties of topological semimetal YbMnSb2 single crystal | Pan, Yu; Fu, Chenguang; Fan, Fengren; He, Yangkun; Felser, Claudia | In this work, we report the thermoelectric properties of topological semimetal YbMnSb 2 single crystal. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2033 | STM/STS of Few-Layer Topological Semimetal NiTe2 at 78 K | Lough, Stephanie; Le, Duy; Blue, Brandon; Thompson, Jesse; Rahman, Talat; Ishigami, Masa | STM/STS of Few-Layer Topological Semimetal NiTe2 at 78 K | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2034 | Topological light meets topological semimetal | Ji, Zhurun; Liu, Wenjing; Krylyuk, Sergiy; Fan, Xiaopeng; Zhang, Zhifeng; Pan, Anlian; Feng, Liang; Davydov, Albert; Agarwal, Ritesh | Recently there has been a lot of interest in understanding how the spin angular momentum (SAM) of light interacts with materials to induce photocurrents (circular photogalvanic effect, CPGE), but not many studies have focused on photocurrents generated by the OAM of light. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2035 | Quenching of Relaxation Pathway In Weyl Semimetal TaAs | Liu, Jiayun; Cheng, Liang; Zhao, Daming; Chen, Xiaoxuan; Li, Zhilin; Chen, Xiaolong; Sun, Handong; Chia, Ee Min | In this work, we studied the ultrafast response of tantalum arsenide (TaAs) in the optical regime through transient reflection spectroscopy with varying pump fluence. | Session 138: Topological Materials: Weyl, Dirac, Chiral, and Other Semimetals |
| 2036 | On the Allowable or Forbidden Nature of Vapor-Deposited Glasses | Bauchy, Mathieu | Here, based on reactive molecular dynamics simulation (MD) of silica glasses, we show that, under certain conditions, vapor-deposited glasses can indeed be more stable than melt-quenched glasses. | Session 139: Molecular and Polymer Glass Structure |
| 2037 | Stable polystyrene glass films through PVD and UV radiation | Yin, Junjie; Raegen, Adam; Forrest, James | In this study, we extend our capacity to make high molecular weight polystyrene stable glass by using oligomeric stable glass as a starting point. | Session 139: Molecular and Polymer Glass Structure |
| 2038 | Physical vapor deposition of a polyamorphic system | Kasting, Benjamin; Beasley, Madeleine; Tracy, Megan; Ediger, Mark | Here we use PVD to investigate triphenyl phosphite (TPP), a known polyamorphic system where the second amorphous state (glacial phase) can be obtained by annealing the ordinary liquid (liquid 1) for hours slightly above its glass transition temperature (205 K). | Session 139: Molecular and Polymer Glass Structure |
| 2039 | Physical properties of ultrastable computer-generated glasses | Berthier, Ludovic | In this talk, we show that this discovery has allowed a deeper understanding of the rheological, thermodynamic and thermal properties of amorphous solids. | Session 139: Molecular and Polymer Glass Structure |
| 2040 | Effects of internal degrees of freedom on simulated vapor deposited glass films | Moore, Alex; Walsh, Patrick; Fakhraai, Zahra; Riggleman, Robert | Thus far, we suggest that molecules exhibiting greater entropy in their supercooled liquid state create more stable PVD glass films. | Session 139: Molecular and Polymer Glass Structure |
| 2041 | Anisotropy of extremely monodisperse polymer stable glass thin films | Raegen, Adam; Yin, Junjie; Zhou, Qi; Forrest, James | Using our recently demonstrated technique for making polymer stable glasses, we present an experimental study of extremely monodisperse, ultrastable polymeric/oligomeric thin films. | Session 139: Molecular and Polymer Glass Structure |
| 2042 | Stability dependence of local elastic inhomogeneities of amorphous solids | Shakerpoor, Alireza; Flenner, Elijah; Szamel, Grzegorz | In this work, we studied the interplay between the stability and the fluctuations in the local elastic constants for a wide range of stabilities. | Session 139: Molecular and Polymer Glass Structure |
| 2043 | Strong elasticity anisotropy in molecular glasses | Wang, Zuyuan; Cang, Yu; Fytas, George; Bishop, Camille; Ediger, Mark | In this work, we use micro-Brillouin light spectroscopy to determine the elastic stiffness tensors of three glass films of itraconazole vapor-deposited at substrate temperatures ( T sub) of 330, 315, and 290 K, respectively. | Session 139: Molecular and Polymer Glass Structure |
| 2044 | High Stability of Ultrathin Vapor Deposited Molecular Glasses | Jin, Yi; Zhang, Yue; Wolf, Sarah; Zhang, Aixi; Govind, Shivajee; Woods, Connor; Samanta, Subarna; Zhernenkov, Mikhail; Freychet, Guillaume; Fakhraai, Zahra | Previous studies demonstrate that a mobility gradient exists within organic glass films, where molecules at or close to the free surface are more mobile than those in the bulk. | Session 139: Molecular and Polymer Glass Structure |
| 2045 | Over what length-scale can the substrate perturb the structure of a vapor-deposited organic glass? | Bagchi, Kushal; Deng, Chuting; Bishop, Camille; Li, Yuhui; Jackson, Nicholas; Toney, Michael; Yu, Lian; De Pablo, Juan; Ediger, Mark | Here we study, with grazing incidence x-ray scattering, the structure of vapor-deposited glasses of molecular glass former DSA-Ph as a function of film thickness. | Session 139: Molecular and Polymer Glass Structure |
| 2046 | Molecular Orientation Depth Profiles from Resonant Soft X-ray Reflectivity | Thelen, Jacob; Bagchi, Kushal; Bishop, Camille; Mukherjee, Subhrangsu; Gann, Eliot; Kline, R. Joseph; Ediger, Mark; DeLongchamp, Dean | We use vapor-deposited films of tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as a model system to develop soft X-ray techniques to extract molecular orientation from organic thin films. | Session 139: Molecular and Polymer Glass Structure |
| 2047 | Molecular dynamics simulation for investigation of Boson peak in a polymer system | Koyama, Akira; Fukao, Koji; Yamamoto, Takashi | We performed a molecular dynamics simulation to investigate Boson peak (BP) in a united atom polyethylene system. | Session 139: Molecular and Polymer Glass Structure |
| 2048 | The effect of molecular architecture on the physical properties of supercooled liquids studied by MD simulations. Density scaling and its relation to the equation of state | Koperwas, Kajetan; Andrzej, Grzybowski; Paluch, Marian | Given this problem into account, we project new model systems, which in contrast to the simple-liquids exhibit structural anisotropy, and we examine the effect of molecular anisotropy on the dynamic and thermodynamic properties of the material. | Session 139: Molecular and Polymer Glass Structure |
| 2049 | Crystal growth and characterization of the magnetic properties of intercalated transition metal dichalcogenides | Lu, Kannan; Sapkota, Deepak; Aczel, Adam; DeBeer-Schmitt, Lisa; Wu, Yan; Mandrus, David; MacDougall, Greg | With this motivation in mind, we have undertaken a concerted effort at Illinois to grow large single crystals of additional intercalated TMDCs, and characterize them with a series of techniques, including magnetization, heat capacity, x-ray and neutron scattering. | Session 140: Novel Magnetic Materials |
| 2050 | Vestigial Potts nematicity in a triangular lattice magnet | Venderbos, Jörn; Fernandes, Rafael | We develop the general theory of (single-q) magnetic order at degenerate symmetry-related wave vectors, and show that distinct magnetic phases can be elegantly captured by composite order parameters: bilinears of the primary magnetic order parameters which transform irreducibly under the symmetry group. | Session 140: Novel Magnetic Materials |
| 2051 | Effect of Confinement on Magnetism and Skyrmionic Properties of CoSi Nanoparticles | Pahari, Rabindra; Balasubramanian, Balamurugan; Ullah, Ahsan; Pathak, Rohit; Kashyap, Arti; Skomski, Ralph; Hadjipanayis, George; Sellmyer, David | In sharp contrast to non-magnetic bulk equiatomic CoSi, we show a magnetic ordering at room temperature with a net magnetic moment m = 0.11 μ B/Co for CoSi nanoparticles. | Session 140: Novel Magnetic Materials |
| 2052 | New magnetic orderings in elemental Neodymium | Suriya Arachchige, Hasitha; DeBeer-Schmitt, Lisa; Parker, David; May, Andrew; Bleuel, Markus; Pokharel, Ganesh; Tian, Wei; Batista, Cristian; Mandrus, David; Christianson, Andrew | Here we present a small angle neutron scattering (SANS) study of neodymium to probe whether the complex magnetic interactions on the double hexagonal closed packed (DHCP) crystal structure of neodymium can host novel spin textures. | Session 140: Novel Magnetic Materials |
| 2053 | Magnetic textures in single crystals of Ni1-xFexBr2 | Rai, Binod; Suriya Arachchige, Hasitha; Pokharel, Ganesh; Liu, Yaohua; Lin, Shizeng; Batista, Cristian; Mandrus, David; Christianson, Andrew; May, Andrew | This presentation will discuss the magnetic properties of Ni 1-xFe xBr 2 single crystals and the magnetic field-temperature phase diagram. | Session 140: Novel Magnetic Materials |
| 2054 | Imaging skyrmions in B20 epitaxial thin films grown on Si substrates using variable temperature Magnetic Force Microscopy (MFM) | Selcu, Camelia; Liu, tao; Pelekhov, Denis; Bennett, Roland; Wang, Binbin; Bagues Salguero, Nuria; Repicky, Jacob; Corbett, Joseph; McCullian, Brendan; Luo, Yunqiu (Kelly); Chen, Shuyu; Ahmed, Adam; Hammel, P Chris; Randeria, Mohit; Gupta, Jay; McComb, David; Kawakami, Roland | Here, we report the first time imaging of the skyrmions in FeGe and Fe rich Fe 1.2Ge epitaxial thin films grown on Si substrates using Magnetic Force Microscopy (MFM). | Session 140: Novel Magnetic Materials |
| 2055 | Frustration Stabilized Skyrmions studied with X-ray Scattering and μSR | Wilson, Murray; Gomilsek, Matjaz; Hicken, Thomas; Moody, Samuel; Birch, Max; Stefancic, Ales; Balakrishnan, Geetha; Lancaster, Tom; Hatton, Peter | In this talk, we will present measurements of resonant X-ray scattering on Gd 2PdSi 3 and muon spin rotation on Gd 2PdSi 3 and Gd 3Ru 4Al 12. | Session 140: Novel Magnetic Materials |
| 2056 | Lattice dynamics of antiperovskite manganese nitrides exhibiting large negative and positive thermal expansion | Patel, Sheena; Hrkac, Stjepan; Brock, Jeffrey; Hua, Nelson; Wen, Haidan; Shpyrko, Oleg; Fullerton, Eric | We present the complex lattice dynamics and discuss the spin-lattice coupling driving their response. | Session 140: Novel Magnetic Materials |
| 2057 | Non-periodic magnetic structure in chiral helimagnet Mn1/3NbS2 | Karna, Sunil; Charilaou, Michalis; Kovács, Andras; DeBeer-Schmitt, Lisa; Young, David; Ditusa, John | We have investigated the magnetic state of Mn 1/3NbS 2 through ac-magnetic susceptibility, Small-angle Neutron Scattering (SANS), Lorentz Transmission Electron Microscopy (LTEM) and micromagnetic simulations. | Session 140: Novel Magnetic Materials |
| 2058 | Local structural distortions and magnetism in lacunar spinel compounds | Zuo, Julia; Schueller, Emily; Seshadri, Ram; Wilson, Stephen | We present results of local structural characterization on lacunar spinels in connection to their magnetic properties. | Session 140: Novel Magnetic Materials |
| 2059 | Magnetic texture evolution within uniaxial kagome ferromagnets immediately below Curie temperature | Sugawara, Akira; Akashi, Tetsuya; Kassem, Mohamed; Tabata, Yoshikazu; Waki, Takeshi; Nakamura, Hiroyuki | We examined magnetic texture within two uniaxial kagome ferromagnets: Co 3Sn 2S 2 (T c=176 K) studied extensively as a Weyl-semimetal and Fe 3Sn 2 (T c= 657 K) interested for its massive Dirac fermions. | Session 140: Novel Magnetic Materials |
| 2060 | Phase Boundary Near a Magnetic Percolation Transition | Khairnar, Gaurav; Lerch, Cameron; Vojta, Thomas | We perform large scale Monte-Carlo simulation of diluted XY and Heisenberg models for both cubic lattices and lattices representing the crystal structure of the hexaferrites. | Session 140: Novel Magnetic Materials |
| 2061 | Driving the magnetic transition by chemical substitution in Cs1-xRbxFeCl3 | Stoppel, Lena; Hayashida, Shohei; Yan, Zewu; Gvasaliya, Severian; Podlesnyak, Andrey; Zheludev, Andrey | The x = 0 compound in this series of triangular-lattice antiferromagnets has a spin-singlet ground state due to strong easy-plane magnetic anisotropy. | Session 140: Novel Magnetic Materials |
| 2062 | Intrinsic stability of magnetic anti-skyrmions in the tetragonal inverse Heusler compound Mn1.4Pt0.9Pd0.1Sn | Saha, Rana; Srivastava, Abhay Kant; Ma, Tianping; Jena, Jagannath; Werner, Peter; Kumar, Vivek; Felser, Claudia; Parkin, Stuart | Here we show, using Lorentz transmission electron microscopy, that anti-skyrmions are found over a wide range of temperature and magnetic field in wedged lamellae formed from single crystals of Mn 1.4Pt 0.9Pd 0.1Sn for thicknesses ranging up to ~250 nm [2]. | Session 140: Novel Magnetic Materials |
| 2063 | Photoluminescence of Monolayer MoS2 under Controlled Environment for Optoelectronic Applications | Birmingham, Blake; Yuan, Jiantan; Filez, Matthias; Fu, Donglong; Hu, Jonathan; Lou, Jun; Scully, Marlan; Weckhuysen, Bert; Zhang, Zhenrong | Our study demonstrates that photoreactions with the gaseous environment on MoS 2 monolayer flakes should be taken into consideration even upon mild photoirradiation as they strongly impact the flakes’ optical properties. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2064 | Imaging strain-localized exciton states in nanoscale bubbles in monolayer transition metal dichalcogenides at room temperature | Darlington, Thomas; Carmesin, Christian; Florian, Mathias; Yanev, Emanuil; Ajayi, Demi; Ardelean, Jenny; Ghiotto, Augusto; Krayev, Andrey; Kysar, Jeffrey; Pasupathy, Abhay; Hone, James; Jahnke, Frank; Borys, Nicholas; Schuck, P. James | Here we combine room-temperature nano-optical imaging of excitons in nanobubbles in 1L-WSe 2 with atomistic structural models to elucidate how strain induces the nanoscale confinement potentials that give rise to highly localized exciton states in 2D semiconductors. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2065 | Multi-harmonic phonon assisted upconversion in van der Waals heterostructure p-n junction photodidodes | Barati, Fatemeh; Arp, Trevor; Su, Shanshan; Lake, Roger; Gabor, Nathaniel | Here, we report on phonon assisted anti-stokes absorption near the interlayer exciton edge of vdW semiconductor heterostructures composed of 2L-WSe 2and MoSe 2. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2066 | Strong-Coupling of Hybrid Quasiparticles in Excitonic-Dielectric Gratings | Abhiraman, Bhaskar; Zhang, Huiqin; Zhang, Qing; Miao, Jinshui; Jo, Kiyoung; Roccasecca, Stefano; Knight, Mark; Davoyan, Artur; Jariwala, Deep | Here, we demonstrate that nanostructured multilayer WS 2 provides an ideal cavity-less and exposed surface platform for exciton-photonics where the WS 2 serves the role of both the cavity and the excitonic medium. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2067 | Ultrafast exciton dynamics in WSe2 optical waveguides | Sternbach, Aaron; Latini, Simone; Chae, Sanghoon; Huebener, Hannes; De Giovannini, Umberto; Shao, Yinming; Xiong, Lin; Sun, Zhiyuan; Shi, Norman; Kissin, Peter; Ni, Guangxin; Rhodes, Daniel; Kim, Brian; Yu, Nanfang; Millis, Andrew; Fogler, Michael; Schuck, P. James; Lipson, Michal; Zhu, Xiaoyang; Hone, James; Averitt, Richard; Rubio, Angel; Basov, Dmitri | We investigated dynamics of excitons in a Van der Waals Semiconducting, WSe 2, waveguide. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2068 | Twist-angle dependent optical properties of interlayer excitons in MoSe2/WSe2 heterostructures | Choi, Junho; Tran, Kha; Moody, Galan; Singh, Akshay; Quan, Jiamin; Sun, Liuyang; Claassen, Rob; Young, Carter; Taniguchi, Takashi; Watanabe, Kenji; Li, Xiaoqin (Elaine) | We investigate the interlayer excitons in MoSe 2/WSe 2 heterostructures, mechanically stacked with an accurately controlled twist angle and capsulated by hexagonal boron nitride. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2069 | Excitonic spectral features of 1L-WSe2 with silicon nitride waveguide coupling | Wu, Yueh-Chun; Samudrala, Sarath; McClung, Andrew; Watanabe, Kenji; Taniguchi, Takashi; Arbabi, Amir; Yan, Jun | In this study, we present excitonic spectral features of 1L-WSe2 coupled to a platform with Silicon nitride (SiNx) waveguides, allowing us to excite and collect signals in different polarizations. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2070 | The Nature of Trions and Trion-Polaritons in 2D Materials: Theory and Experiments | Koksal, Okan; Jung, Minwoo; Manolatou, Christina; Shvets, Gennady; Rana, Farhan | In this work we present a many body description of trions and trion-polaritons that is valid over a wide range of electron densities. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2071 | Excitonic Lifetime in CVD-Grown, Few-Layer MoTe2 | Schulzetenberg, Aaron; Johns, James | Excitonic Lifetime in CVD-Grown, Few-Layer MoTe2 | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2072 | Continuous Wave Sum Frequency Generation and Imaging of Monolayer and Heterobilayer 2D Semiconductors | Yao, Kaiyuan; Yanev, Emanuil; Chuang, Hsun jen; Rosenberger, Matthew; Xu, Xinyi; Darlington, Thomas; McCreary, Kathleen; Hanbicki, Aubrey; Jonker, Berend; Zhu, Xiaoyang; Basov, Dmitri; Hone, James; Schuck, P. James | Using sum frequency excitation spectroscopy and imaging, we identify and distinguish one- and two-photon resonances in both monolayers and heterobilayers. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2073 | Second harmonic generation spectroscopy of MoS2/WSe2 heterostructure | Kim, Jungcheol; Cheong, Hyeonsik | Second harmonic generation spectroscopy of MoS2/WSe2 heterostructure | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2074 | Trion valley relaxation dynamics in monolayer WSe2 | Shinokita, Keisuke; Wang, Xiaofan; Miyauchi, Yuhei; Watanabe, Kenji; Taniguchi, Takashi; Konabe, Satoru; Matsuda, Kazunari | Here we report the valley relaxation dynamics of the bright state of positively charged excitons (bright positive trions) in monolayer WSe 2 through polarization- and time-resolved photoluminescence and femtosecond transient reflection measurements. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2075 | Pressure-tunable stacking order in few-layer WS2 revealed by second harmonic generation | Wei, Chengrong; Su, Huimin; Zhou, Xuefeng; Wang, Shanmin; Dai, Jun-Feng | The tunability of translation structural symmetry by using a hydrostatic pressure presented in this work provides a platform to explore novel physical properties in new class of 2D materials. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2076 | Donor-acceptor-pair transitions in suspended monolayer WS2 | Wang, Yunkun; Luo, Hailan; Zhou, Xingjiang; Huang, Yuan; Gao, Yunan | Here we report observation and characterization of DAP transitions in a suspended monolayer WS 2 using steady-state and time-resolved photoluminescence spectroscopy. | Session 141: Optical Spectroscopic Measurements of 2D Materials |
| 2077 | Understanding the Magnetic-Field Anisotropy of Kitaev Materials | Rayyan, Ahmed; Gordon, Jacob; Kee, Hae-Young | To this end, we present the classical and quantum phase diagrams of the extended anisotropic Kitaev model under different magnetic field directions. | Session 142: Kitaev Magnetism: Theory |
| 2078 | Majorana-magnon crossover by a magnetic field in the Kitaev model | Motome, Yukitoshi; Yoshitake, Junki; Nasu, Joji; Kato, Yasuyuki | Here we present unbiased large-scale numerical results for the Kitaev model in a wide range of magnetic field and temperature, obtained by continuous-time quantum Monte Carlo simulations. | Session 142: Kitaev Magnetism: Theory |
| 2079 | Spin-one Kitaev model, same but different? | Khait, Ilia; Kee, Hae-Young; Kim, Yong-Baek | We study various properties of the spin-one Kitaev model on honeycomb lattices consisting of two and three-leg ladder geometries using density matrix renormalization group. | Session 142: Kitaev Magnetism: Theory |
| 2080 | Vacancy-induced Low-energy States in the Kitaev Model | Kao, Wen-Han; Knolle, Johannes; Moessner, Roderich; Perkins, Natalia | In this work, we demonstrate that a finite density of random vacancies gives rise to a remarkable pile up of low-energy states and possibly explains the experimental findings in H 3LiIr 2O 6. | Session 142: Kitaev Magnetism: Theory |
| 2081 | Field induced phases of the Kitaev-Γ ladder | Sorensen, Erik; Catuneanu, Andrei; Gordon, Jacob; Kee, Hae-Young | Employing large-scale numerical techniques, we study the KG model in a two-leg ladder system in the presence of a magnetic field for the entire phase space of the KG model, finding both disordered and incommensurate ordered phases near the antiferromagnetic Kitaev region. | Session 142: Kitaev Magnetism: Theory |
| 2082 | Field-Driven Phenomena in 2-d and 3-d Kitaev Magnets | Hickey, Ciaran; Trebst, Simon; Gohlke, Matthias; Berke, Christoph | Kitaev’s honeycomb model is an exactly solvable spin model that realises a quantum spin liquid ground state, with fractionalised excitations in the form of Majorana fermions and plaquette flux excitations. | Session 142: Kitaev Magnetism: Theory |
| 2083 | Magnetic Field Induced Competing Phases in Spin-Orbital Entangled Kitaev Magnets | Chern, Li Ern; Kaneko, Ryui; Lee, Hyun-Yong; Kim, Yong-Baek | In this work, we provide a semiclassical analysis of the relevant theoretical models, which enable us to treat large system sizes approximating the thermodynamic limit. | Session 142: Kitaev Magnetism: Theory |
| 2084 | Numerical Studies of the Kitaev-Gamma Model Under a Magnetic Field | Gordon, Jacob; Catuneanu, Andrei; Kee, Hae-Young | Here we present results obtained with ED to address these open questions. | Session 142: Kitaev Magnetism: Theory |
| 2085 | Vison crystals in an extended Kitaev model on the Honeycomb latttice | Batista, Cristian; Zhang, Shangshun; Wang, Zhentao; Halasz, Gabor | I will introduce an extension of the Kitaev honeycomb model by including four-spin interactions that preserve the local gauge structure and hence the integrability of the original model. | Session 142: Kitaev Magnetism: Theory |
| 2086 | Partitioning the phase diagram of pyrochlore and Kitaev magnets using graph theory | Liu, Ke; Greitemann, Jonas; Jaubert, Ludovic; Yan, Han; Shannon, Nicholas; Pollet, Lode | In this talk, I will show that the combination of a kernel method and graph partitioning theory provides an efficient framework to unravel the complex phase diagram of frustrated magnets. | Session 142: Kitaev Magnetism: Theory |
| 2087 | Quantum Spin Liquid and Proximate Magnetic Orders in Magnets with Spin-Orbit Coupling | Nanda, Animesh; Dhochak, Kusum; Bhattacharjee, Subhro | In this talk, I shall report our theoretical calculations about the nature of such unconventional phase transition in a class of experimentally relevant Hamiltonians in the honeycomb magnets. | Session 142: Kitaev Magnetism: Theory |
| 2088 | Angle Resolved Photoelectron Spectroscopy Studies on the Surface Electronic Structure of Tetragonal CH3NH3PbI3 | Park, Jeehong; Kang, Donghee; Yang, Jaehyun; Choi, Young Woo; Huh, Soonsang; Choi, Hyoung Joon; Kim, Changyoung; Lee, Hyunbok; Yi, Yeonjin | In this presentation, we present our unprecedented high-quality ARPES results measured on single crystal CH 3NH 3PbI 3 (001) surface. | Session 143: Spectroscopy of Halide Perovskites |
| 2089 | Wavelength Dependent Photostability of Perovskite Thin Films | Ecker, Ben; Wang, Ke; Gao, Yongli | Here we will present our recent in-situ wavelength-dependent photostability investigation on bare perovskite thin films. | Session 143: Spectroscopy of Halide Perovskites |
| 2090 | Excitonic behavior in hybrid halide perovskite for optoelectronic applications | Jung, Hye Ri; Jo, William | We described electronic band structures of halide perovskite effected by photovoltage. | Session 143: Spectroscopy of Halide Perovskites |
| 2091 | Recombination Dynamics of Chlorine Doped Hybrid Perovskite Single Crystals | Mix, La Moyne; Lee, Min-Cheol; O’Neal, Kenneth; Sirica, Nicholas; Tisdale, Jeremy; Nie, Wanyi; Prasankumar, Rohit; Yarotski, Dzmitry | Recombination Dynamics of Chlorine Doped Hybrid Perovskite Single Crystals | Session 143: Spectroscopy of Halide Perovskites |
| 2092 | Ultrafast Carrier Dynamics of Dual Emissions from Methylammonium Lead Iodide Perovskites | Munoz, Maria; Titze, Michael; Chengbin, Fei; Wang, Xuewen; Wang, He; Li, Hebin | We implemented optical two-dimensional coherent spectroscopy to study the carrier dynamics and coupling of dual emissions in Methylammonium Lead Iodide film at 115 K. | Session 143: Spectroscopy of Halide Perovskites |
| 2093 | Third-order optical nonlinearities of lead halide perovskite single crystals | Ohara, Keiichi; Yamada, Takumi; Tahara, Hirokazu; Aharen, Tomoko; Hirori, Hideki; Suzuura, Hidekatsu; Kanemitsu, Yoshihiko | In this work, we determined the third-order nonlinear optical coefficients of the wide-gap semiconductor MAPbCl 3 single crystals by using the Z-scan method. | Session 143: Spectroscopy of Halide Perovskites |
| 2094 | Fine Features of Free and Bound Excitons in the Photoluminescence of Single Crystal MAPbI3 | Sheffield, Matthew; Yao, Yue; Brown Heft, Isaac; Hewa Walpitage, Heshan; Liu, Ye; Ni, Zhenyi; Huang, Jinsong; Li, Yan | Here, we study PL on high quality MAPbI 3 single crystals in the orthorhombic phase. | Session 143: Spectroscopy of Halide Perovskites |
| 2095 | Spintronic Terahertz Emission by Ultrafast Spin-Charge Current Conversion in Reduced Dimensional Organic-Inorganic Hybrid Perovskites | Cong, Kankan; Vetter, Eric; Liang, Yan; Li, Yi; Zhang, Qi; Xiong, Yuzan; Qu, Hongwei; Schaller, Richard; Hoffmann, Axel; Kemper, Alexander; You, Wei; Wen, Haidan; Zhang, Wei; Sun, Dali | We observed spin-dependent THz radiation at room temperature. | Session 143: Spectroscopy of Halide Perovskites |
| 2096 | Utrafast Spectroscopy Studies in Chiral Hybrid Perovskites | Zhai, Yaxin; Beard, Matthew | Here we report our recent studies on the optical and spin properties in FAPbBr3 nanoparticles with different ratio of chiral ligands by using the broadband ultrafast spectroscopy. | Session 143: Spectroscopy of Halide Perovskites |
| 2097 | Exciton decoherence probed by magneto-photoluminescence in halide perovskite bulk single crystals | Tan, Liang; Kostadinov, Alyssa; Lifshitz, Efrat | Understanding the physics behind the high performance of lead halide perovskite compounds is an urgent objective of photovoltaics research. | Session 143: Spectroscopy of Halide Perovskites |
| 2098 | Investigating the Optical and Electrical Properties of Two-dimensional Organic-inorganic Hybrid Perovskite Multiple Quantum Wells via Electroabsorption Spectroscopy Studies | Whittaker-Brooks, Luisa | In this talk, I will discuss the role of excitons/free carries, sample heterogeneity, orientation, and bias stress effects on the photovoltaic performance of OIHPs. | Session 143: Spectroscopy of Halide Perovskites |
| 2099 | Visible and near-infrared emission properties of melt-grown Dy doped CsPbCl3 perovskite crystals | uba, samuel; Hommerich, uwe; Allen, Alix | In this research, we studied the material preparation and the visible to near IR optical properties of Dy 3+ doped CsPbCl 3. | Session 143: Spectroscopy of Halide Perovskites |
| 2100 | Improvement of luminescence properties of surface-passivated mixed-halide perovskites with CdSe/ZnS quantum dots | Cho, Il-Wook; Ryu, Mee-Yi | We investigated the luminescence properties of surface-passivated mixed halide perovskite (CH 3NH 3PbI 2Br) using photoluminescence (PL) and time-resolved PL spectroscopy. | Session 143: Spectroscopy of Halide Perovskites |
| 2101 | Ultrathin epitaxial Na3Bi films for topological electronics | Fuhrer, Michael | Ultrathin epitaxial Na3Bi films for topological electronics | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2102 | Polymerized triptycene as a candidate material of higher-order topological insulator | Mizoguchi, Tomonari; Maruyama, Mina; Okada, Susumu; Hatsugai, Yasuhiro | So far, various theoretical models for HOTIs have been proposed, and it is highly desirable to search suitable materials to realize the HOTIs. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2103 | Apatite as a higher-order topological insulator with 2/3-filled hinge states | Hirayama, Motoaki; Takahashi, Ryo; Matsuishi, Satoru; Hosono, Hideo; Murakami, Shuichi | In our previous work we have shown that electrides are suitable for achieving various topological semimetal phases [1]. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2104 | Evidence of Higher Order Topology in WTe2 from Josephson Coupling through Anisotropic Hinge States | Choi, Yong-Bin; Xie, Yingming; Chen, Chui-Zhen; Park, Jinho; Song, Su-Beom; Yoon, Jiho; Kim, Bumjoon; Taniguchi, Takashi; Watanabe, Kenji; Lee, Hu-Jong; Kim, Jonghwan; Fong, Kin Chung; Ali, Mazhar; Law, Kam Tuen; Lee, Gil-Ho | Here, we spatially resolved the hinge states by analysing the magnetic field interference of supercurrent in Nb-WTe 2-Nb proximity Josephson junctions. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2105 | Higher order topological insulators in anti-perovskites | Fang, Yuan; Cano, Jennifer | In order to reveal the gapless hinge states in the presence of mirror Chern surface states, several ways of opening the surface gap are proposed and confirmed by calculation, including cleaving the lattice to reveal a low-symmetry surface, building a heterostructure, and applying strain. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2106 | Transport evidence of triply degenerate nodal semimetal YRh6Ge4 | Zhu, Yanglin; Gui, Xin; Wang, Yu; Graf, David; Xie, Weiwei; Mao, Zhiqiang | In this talk, we report our magnetotransport studies on YRh 6Ge 4, which was recently predicted to be a TDNS[3]. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2107 | Cornering the zero mode: realization of an artificial electronic higher-order topological insulator | Slot, Marlou; Kempkes, Sander; van den Broeke, Jette; Capiod, Pierre; Benalcazar, Wladimir; Bercioux, Dario; Vanmaekelbergh, Daniel; Morais Smith, Cristiane; Swart, Ingmar | More specifically, we create a breathing kagome lattice by manipulating carbon monoxide molecules on a Cu(111) surface using a scanning tunneling microscope [1]. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2108 | Systematic investigation of physical properties of YbB6±x using the combinatorial approach | Lee, Seunghun; Zhang, Xiaohang; Al Hasan, Naila; Hou, Huilong; Sarker, Suchismita; Mehta, Apurva; Greene, Richard; Takeuchi, Ichiro | We are systematically investigating the physical properties of YbB 6±x depending on stoichiometry using the thin-film combinatorial approach. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2109 | The fate of topological properties in U-based materials | Benedetto Santos, Frederico; Thompson, Joe; Bauer, Eric; Thomas, Sean; Ronning, Filip; Rosa, Priscila | In this talk, I will discuss the growth of USbTe single crystals and their physical properties characterization via thermodynamic and electrical transport measurements at ambient pressure and under applied pressure. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2110 | New kagome prototype materials: discovery of KV3Sb5, RbV3Sb5, CsV3Sb5 | Ortiz, Brenden; Gomes, Lidia; Morey, Jennifer; Winiarski, Michal; Bordelon, Mitchell; Mangum, John; Oswald, Iain; Rodriguez-Rivera, Jose; Neilson, James; Wilson, Stephen; Ertekin, Elif; McQueen, Tyrel; Toberer, Eric | Recently we discovered a new class of kagome metals: KV 3Sb 5, RbV 3Sb 5, and CsV 3Sb 5, all of which crystallize in the P6/mmm space group and exhibit a structurally perfect kagome lattice of vanadium. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2111 | Tuning the Fermi level to access the flat bands in PbPd3 | Wei, Kaya; Neu, Jennifer; Chappell, Greta; Schundelmier, Benny; Mann, Chris; Graf, David; Choi, Eun; Siegrist, Theo; Baumbach, Ryan | We will discuss detailed results of the Fermi surface topology measurements on these doped series and prospects for tuning the E F in the opposite direction to meet the Dirac cone. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2112 | The Bulk boundary Correspondence in 3d non-Hermitian Semimetals | Zhang, Zhicheng; Yang, Zhesen; Hu, Jiangping | In this article, we apply these methods to the study of the bulk-boundary correspondence of non-Hermitian semimetal model. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2113 | Phonon Hall effect in nonmagnetic insulators | Saito, Takuma; Misaki, Kou; Ishizuka, Hiroaki; Nagaosa, Naoto | In sharp contrast, our study shows that THE of phonon is possible even without magnetic moment. | Session 144: Topological Materials: Semimetals and Higher Order States |
| 2114 | Evidence of anisotropic Majorana bound states in 2M-WS2 | Li, Wei | A possible topological superconductor 2M-WS 2 has been discovered and its superconducting transition temperature is ~ 8.8 K. By using low-temperature scanning tunneling microscopy, we have made direct observation of a clean Majorana zero mode in this transition metal dichalcogenide. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2115 | Applications of a Novel Quantum Interband Index in Condensed Matter: Topological Insulators, Optical Selection Rules, and Beyond | Warnakulasooriya Fernando, Tharindu; Cao, Ting; Wu, Congjun | In this talk, we present numerical calculations of the index T in various systems. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2116 | Bulk superconductivity in FeTe1−xSex via physicochemical pumping of excess iron | Dong, Lianyang; Zhao, He; Zeljkovic, Ilija; Wilson, Stephen; Harter, John | Here we report a novel physicochemical process for pumping this interstitial iron out of the FeTe1-xSex matrix and achieving bulk superconductivity. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2117 | Molecular Beam Epitaxy Growth of Superconducting Sn1-xInxTe (0 ≤ x ≤ 0.67) Thin Films | Masuko, Makoto; Yoshimi, Ryutaro; Tsukazaki, Atsushi; Kawamura, Minoru; Takahashi, Kei; Kawasaki, Masashi; Tokura, Yoshinori | In this work, we report the thin film growth of rock-salt type SC Sn 1-xIn xTe (SIT) by means of molecular beam epitaxy. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2118 | Proximity-induced superconductivity in SnTe thin films | Rachmilowitz, Bryan; Zhao, He; Li, Hong; LaFleur, Alexander; Schneeloch, John; Zhong, Ruidan; Gu, Genda; Zeljkovic, Ilija | Here we report the synthesis of heterostructures of a prototypical TCI SnTe(111) and high temperature superconductor Fe(Te,Se) using molecular beam epitaxy. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2119 | Fractional disclination charge in two-dimensional Cn−symmetric topological crystalline insulators | Li, Tianhe; Zhu, Penghao; Benalcazar, Wladimir; Hughes, Taylor | We thoroughly investigate the fractional charge on disclinations in C n symmetric TCIs, with or without time-reversal symmetry, and including spinless and spin-1/2 cases. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2120 | Tuning the Edge States of Topological Crystalline Insulator Bismuthene via Substrate Effects | Wang, Chutian; Yin, Yuefeng; Fuhrer, Michael; Medhekar, Nikhil | In this theoretical study based on first principles calculations and Wannier tight-binding models, we show that the edge states of TCI bismuthene can be stabilized on some substrates (e.g. h-BN and SiC) when the stacking pattern does not break mirror symmetry. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2121 | Searching for ideal topological crystalline insulators and topological superconductors in Pb-Sn-In-Te system | Gu, Genda; Zhong, Ruidan; Li, Yangmu; Li, Qiang; Valla, Tonica; Tranquada, John | We have studied the effect of crystal growth condition, impurity and composition on the bulk electrical conductivity of these single crystals. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2122 | Superconducting proximity effect in InAsSb surface quantum wells with in-situ Al contacts | Schiela, William; Mayer, William; Yuan, Joseph; Hatefipour, Mehdi; Sarney, Wendy; Svensson, Stefan; Leff, Asher; De Campos, Tiago; Wickramasinghe, Kaushini; Dartiailh, Matthieu; Zutic, Igor; Shabani, Javad | We demonstrate a robust superconducting proximity effect in InAs 0.5Sb 0.5 quantum wells grown with epitaxial Al contacts, which has important implications for mesoscopic and topological superconductivity. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2123 | Topological Properties of Superconducting PdTe | Chapai, Ramakanta; Reddy, Peram; Xing, Lingyi; Graf, David; Karki, Amar; Xie, Weiwei; Ditusa, John; Chang, Tay-Rong; Jin, Rongying | We have investigated its normal-state electronic properties via both first principles calculations and magnetic torque measurements by applying magnetic field up to 35 Tesla. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2124 | Tuning topological hinge states of Bi by edge adsorption: first-principles study | Naumov, Ivan; Dev, Pratibha | Recent studies have shown that bismuth is a crystalline topological insulator and, additionally, hosts two different second-order band topologies that are protected by twofold and the threefold rotational symmetries [1,2]. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2125 | The edge theories of 2D fermionic symmetry protected topological phases | Ning, Shangqiang; Wang, Chenjie; Wang, Qing-Rui; Gu, Zhengcheng | In this paper, we utilize the Abelian Chern-Simons theory to study the fermionic SPT phases protected by Abelian total symmetry $G_f$ that is a central extension of bosonic symmetry $G_b$ by fermion parity symmetry $Z_2^f$. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2126 | Selective Control of Surface Spin Current in Topological Pyrite OsX2 (X= Se, Te) Crystals | Yin, Yuefeng; Fuhrer, Michael; Medhekar, Nikhil | Here we report the discovery of highly anisotropic surface spin textures in the (001) surfaces of topological pyrite OsX 2 (X = Se, Te) crystals using first principles calculations and Wannier tight-binding models. | Session 145: Topological Materials: Topological Superconductors and Majorana States |
| 2127 | Valence bond glass state in the 4d1 Mo5+ fcc antiferromagnet Ba2LuMoO6 | Mustonen, Otto; Mutch, Heather; Baker, Peter; Walker, Helen; Pughe, Charlotte; Coomer, Fiona; Liu, Cheng; Dutton, Sian; Cussen, Edmund | Here we show that it is a valence bond glass; similar to the well known isostructural Ba 2YMoO 6 compound. | Session 146: Spin-orbit coupled systems |
| 2128 | Tuning electron correlation strength by charge doping of 5d1 double perovskites | Garcia, Erick; Forino, Paola; Cong, Rong; Snider, Charles; Tran, Phuong; Woodward, Patrick; Mitrovic, Vesna; Sanna, Samuele | Here, we present a systematic study of the electron doped powder Mott insulator Ba 2Na 1-xCa xOsO 6 through the Na/Ca partial substitution using 23Na nuclear magnetic resonance at various doping concentrations. | Session 146: Spin-orbit coupled systems |
| 2129 | NMR study on single crystal Ba2LiOsO6 | Snider, Charles; Cong, Rong; Garcia, Erick; Sanna, Samuele; Ramakrishna, Sanath; Reyes, Arneil; Yan, Jiaqiang; Mitrovic, Vesna | NMR study on single crystal Ba2LiOsO6 | Session 146: Spin-orbit coupled systems |
| 2130 | On the charge transfer energy in iridates: a hard x-ray photoelectron spectroscopy study | Takegami, Daisuke; Kasinathan, Deepa; Wolff, Klaus; Altendorf, Simone; Chang, Chun-Fu; Hoefer, Katharina; Meléndez-Sans, Anna; Utsumi, Yuki; Meneghin, Federico; Ha, Thai Duy; Yen, Chien-Han; Chen, Kai; Kuo, Chang-Yang; Liao, Y. F.; Tsuei, Ku-Ding; Morrow, Ryan; Wurmehl, Sabine; Prasad, B.E.; Jansen, Martin; Komarek, Alexander; Hansmann, Philipp; Tjeng, Liu Hao | We have investigated the electronic structure of iridates in the double perovskite crystal structure containing either Ir 4+ or Ir 5+ using hard x-ray photoelectron spectroscopy (HAXPES). | Session 146: Spin-orbit coupled systems |
| 2131 | Monte Carlo simulation of a strong SOC model for d1 double perovskite | Cong, Rong; Marston, John; Mitrovic, Vesna | To investigate the possible spin and orbital order patterns consistent with the NMR observations, we performed Monte Carlo simulations of a microscopic model for d 1 double perovskites magnetic Mott insulators with multipolar spin interactions [2] . | Session 146: Spin-orbit coupled systems |
| 2132 | Ground state in the novel dimer iridate Ba13Ir6O30 with Ir6+(5d3) Ions | Zhao, Hengdi; Ye, Feng; Zheng, Hao; Hu, Bing; Ni, Yifei; Zhang, Yu; Kimchi, Itamar; Cao, Gang | We have synthesized and studied a new iridate, Ba 13Ir 6O 30, with unusual Ir oxidation states: 2/3 Ir 6+( 5d3) ions and 1/3 Ir 5+( 5d4) ions. | Session 146: Spin-orbit coupled systems |
| 2133 | Spin-orbital-entangled quantum magnet on a honeycomb lattice | Takayama, Tomohiro | We argue that the disordered OH/OD bonds likely play a role to stabilize the quantum liquid state. | Session 146: Spin-orbit coupled systems |
| 2134 | Jahn-Teller effect and spin-orbit coupling in t2g systems | Streltsov, Sergey; Khomskii, Daniel | In this talk we will discuss a very general problem of interplay between the Jahn-Teller (JT) effect and the spin-orbit coupling (SOC). | Session 146: Spin-orbit coupled systems |
| 2135 | Thermodynamics of Spin-Orbital Coupled Magnets: The Case of Dimers and Timers | Winter, Stephen; Li, Ying; Valenti, Roser | In this contribution, we focus on the theoretical description of recently reported spin-liquid candidate materials based on mixed valence M 2O 9 dimers [1] and M 3O 12 trimers [2,3]. | Session 146: Spin-orbit coupled systems |
| 2136 | Effect of disorder in Kitaev materials | Perkins, Natalia; Knolle, Johannes; Moessner, Roderich; Kao, Wen-Han | Here we discuss how include vacancies in this consideration and consider combined effect of bond disorder and vacances at finite temperature properties of the Kitaev quantum spin liquid. | Session 146: Spin-orbit coupled systems |
| 2137 | Resonant elastic x-ray scattering on the molecular orbital in Li2RuO3 | Yun, Seokhwan; Kim, Beom Hyun; Lee, Ki; Porter, Dan; Matteo, Sergio; Kang, Soonmin; Jeong, Jaehong; bombardi, alessandro; Park, Je-Guen | We observed a distinct phase difference in the polarization dependence between Ru 2 p-4 d ( t 2g) and 2 p-4 d ( e g) process. | Session 146: Spin-orbit coupled systems |
| 2138 | Fermi surface instability in the antiferromagnetic Dirac material Ca1-xNaxMnBi2 | Degiorgi, Leonardo; Corasaniti, Matteo; Yang, Run | This work describes novel results of reflectivity measurements from the far-infrared up to the ultraviolet that probe the optical response as a function of temperature. | Session 147: Weyl semimetals, nonlinear optics |
| 2139 | Evidence for Strong Electron-Phonon Coupling in Weyl Semimetals | Osterhoudt, Gavin; Garcia, Christina; Plisson, Vincent; Coulter, Jennifer; Gooth, Johannes; Shen, Bing; Ni, Ni; Felser, Claudia; Narang, Prineha; Burch, Kenneth | In this presentation we discuss our recent temperature dependent Raman measurements on multiple TSMs which reveal unusual temperature dependence of the linewidths. | Session 147: Weyl semimetals, nonlinear optics |
| 2140 | Second Order Nonlinear Responses in Chiral Weyl Semimetal CoSi | Drueke, Elizabeth; Owen, Rachel; Day, Matthew; Tian, Shangjie; Li, Change; Lei, Hechang; Cundiff, Steven; Zhao, Liuyan | Here, we present our study of the second order nonlinear responses in one such chiral Weyl semimetal, CoSi. | Session 147: Weyl semimetals, nonlinear optics |
| 2141 | Magnetic-Field Dependence of Chirality-Resolved Optical Phonon in Weyl semimetal | Zhang, Kunyan; McCreary, Amber; Han, Fei; Li, Mingda; Hight Walker, Angela; Huang, Shengxi | In this work, we study the chirality-resolved optical phonons in type-I WSM TaP under magnetic field, using Raman spectroscopy with excitations of both linear and circularly polarized lasers. | Session 147: Weyl semimetals, nonlinear optics |
| 2142 | Unique Optical Responses of Weyl Semimetals | Burch, Kenneth | Here I will discuss our recent results on a range of Weyl semimetals. | Session 147: Weyl semimetals, nonlinear optics |
| 2143 | Weyl Semimetals in Nanophotonics and Quantum Optoelectronics | Garcia, Christina; Narang, Prineha | In this talk, we discuss our first principles calculations of optoelectronic properties of Weyl semimetals for integration with nanophotonic and plasmonic architectures. | Session 147: Weyl semimetals, nonlinear optics |
| 2144 | Large longitudinal circular photogalvanic effect in a chiral Weyl semimetal | Ni, Zhuoliang; Wang, Kefeng; XU, Bing; Han, Xingyue; Manna, Kaustuv; Paglione, Johnpierre; Felser, Claudia; Wu, Liang | Here, we report a large photocurrent generated by circularly polarized light in a chiral Weyl semimetal. | Session 147: Weyl semimetals, nonlinear optics |
| 2145 | Polarized Transient Reflectance Spectroscopy of Type II Weyl Semimetal NbIrTe4 | Linser, Samuel; Jnawali, Giriraj; Pournia, Seyyedesadaf; Abbasian Shojaei, Iraj; Jackson, Howard; Smith, Leigh; Le, Congcong; Zhang, Fu-Chun; Ortiz, Brenden; Wilson, Stephen | We present polarized transient reflectance of single nanoflakes of NbIrTe 4, employing ultrafast (140 fs) NIR pump and MIR probe pulses. | Session 147: Weyl semimetals, nonlinear optics |
| 2146 | Angle and Polarization-Resolved Resonant Raman Spectroscopy of the Type-II Weyl Semimetal NbIrTe4 | Abbasian Shojaei, Iraj; Jnawali, Giriraj; Pournia, Seyyedesadaf; Linser, Samuel; Jackson, Howard; Smith, Leigh; Le, Congcong; Zhang, Fu-Chun; Ortiz, Brenden; Wilson, Stephen | We perform polarized Raman spectroscopy measurements of single nanoflakes exfoliated from a single crystal of the layered ternary compound NbIrTe 4. | Session 147: Weyl semimetals, nonlinear optics |
| 2147 | Investigating the Energy Dependent Photogalvanic Effect in the Type-II Weyl Semimetal NbIrTe4 | Pournia, Seyyedesadaf; Jnawali, Giriraj; Abbasian Shojaei, Iraj; Linser, Samuel; Jackson, Howard; Smith, Leigh; Le, Congcong; Zhang, Fu-Chun; Wilson, Stephen; Ortiz, Brenden | We explore the photogalvanic effect in NbIrTe 4 , a type II Weyl semimetal. | Session 147: Weyl semimetals, nonlinear optics |
| 2148 | Investigation of optical properties of 3D Dirac materials | Joint, Francois; Jenkins, Gregory; Cava, Robert; Basov, Dmitri; Drew, Howard | A Dirac semimetal band structure has been observed in with ARPES but the study of their electric-optical properties has yet to be further developed Here, we present spectral measurements on the 3D Dirac semimetal . | Session 147: Weyl semimetals, nonlinear optics |
| 2149 | Coulomb correlation in noncollinear antiferromagnetic α-Mn | Pulkkinen, Aki; Barbiellini, Bernardo; Nokelainen, Johannes; Sokolovskiy, Vladimir; Baigutlin, Danil; Miroshkina, Olga; Zagrebin, Mikhail; Buchelnikov, Vasiliy; Lane, Christopher; Markiewicz, Robert; Bansil, Arun; Sun, Jianwei; Pussi, Katariina; Lahderanta, Erkki | We discuss the interplay between magnetic and structural degrees of freedom in elemental Mn. | Session 148: Metals: Magnetic and Structural |
| 2150 | Magnetic and electronic properties of tetragonal GeNFe3 | Tsumuraya, Mari; Singh, David | Through first-principles calculations, we report magnetic and electronic properties of GeNFe3 with tetragonal structure. | Session 148: Metals: Magnetic and Structural |
| 2151 | The effect of Si substitution on the magnetocaloric properties of Al1.2-xSixFe2B2 intermetallic system | Himel, Md Sakhawat Hossain; Khan, Mahmud | Here, we have investigated the magnetic and magnetocaloric properties of a series of Si-doped Al 1.2-xSi xFe 2B 2 (0 ≤ x ≤ 0.25) compounds by x-ray diffraction, scanning electron microscopy (SEM), and dc magnetization measurements. | Session 148: Metals: Magnetic and Structural |
| 2152 | A first-principles study of the impact of paramagnetism on grain boundary segregation in FeMn alloys | Hegde, Omkar Gopalkrishna; Hickel, Tilmann; Freysoldt, Christoph; Neugebauer, Joerg | Therefore, a new computationally efficient method based on spin-space averaging [1] has been developed to handle magnetic disorder next to defects, which uses the spin constraint tool developed in the DFT code S/PHI/nX. | Session 148: Metals: Magnetic and Structural |
| 2153 | Tuning of the collapsed tetragonal phase transition in the SrTM2P2 (TM = transition metal) system | Gorgen Lesseux, Guilherme; Ribeiro, Raquel; Bud’ko, Sergey; Canfield, Paul | As part of our effort to broaden our understanding and control of this transition, we have studied the effects of transition metal substitution on SrNi 2P 2. | Session 148: Metals: Magnetic and Structural |
| 2154 | First Principles study of enhanced stability of Au@Pt nanoparticles on MoS2 support through alloying kinetics | Yang, Timothy; Song, Boao; Saidi, Wissam; Shahbazian-Yassar, Reza | The present work gives insights to the degradation mechanisms of the NPs supported on substrates and offers strategies to enhance their stability. | Session 148: Metals: Magnetic and Structural |
| 2155 | Quantum Quench and f-Sum Rules on Linear and Non-linear Conductivities | Watanabe, Haruki; Oshikawa, Masaki | In this talk, we give a new derivation to the f-sum rule for general quantum many-particle systems by considering a quench process. | Session 148: Metals: Magnetic and Structural |
| 2156 | Binary and ternary metallic compounds with soft magnetic properties: predictions from density functional theory calculations | Singh, Akansha; Stebner, Aaron; Ciobanu, Cristian | With the aim of finding better soft magnetic alloys, we performed a systematic computational search across binary ( D03, formula X 3Z) and ternary ( L 21, XY 2Z) compounds, using generalized gradient approximation calculations. | Session 148: Metals: Magnetic and Structural |
| 2157 | Ab initio thermodynamics of carbides in high Mn steels | Sreekala, Lekshmi; Dey, Poulumi; Hickel, Tilmann; Neugebauer, Joerg | In the present work, we therefore use density functional theory to determine the thermodynamic driving force for the formation of carbides as a function of the chemical composition of the alloy. | Session 148: Metals: Magnetic and Structural |
| 2158 | Atomic-level defect formation mechanism in high-entropy alloys | Tung, Chi-Huan; Huang, Guan-Rong; Chen, Wei-Ren; Chang, Shou-Yi | With the aid of atomistic simulations, we found that in solid solution alloys the soft spots detected by the the spatial distributions of low frequency vibration modes served as precursors of atomic level rearrangement. | Session 148: Metals: Magnetic and Structural |
| 2159 | Drag viscosity of metals and its connection to Coulomb drag | Liao, Yunxiang; Galitski, Victor | In this work, we find that there exists a previously overlooked contribution to viscosity, which originate from the interacting part of the stress tensor. | Session 148: Metals: Magnetic and Structural |
| 2160 | Local structure analysis of carbon in ferritic steel by C K-edge X-ray absorption fine structure and multiple scattering calculations | Ninomiya, Kakeru; Tamenori, Yusuke; Tsuruta, Kazuki; Nishibori, Maiko | 1 In this study, we aimed to understand the local structure changes of solid solution carbon in ferritic steel with aging by soft X-ray absorption spectroscopy. | Session 148: Metals: Magnetic and Structural |
| 2161 | Accelerating Materials Discovery through Bezier Interpolation of Electronic Band Structure | Foulk, Nathan; Jorgensen, Jeremy; Hart, Gus | We present an integration technique of interpolating the bands using Bezier surfaces in order to more accurately represent the Fermi surface, and thereby achieve the same accuracy with fewer k-points. | Session 148: Metals: Magnetic and Structural |
| 2162 | Exploring band topology of engineered materials using deep neural networks | Peano, Vittorio; Sapper, Florian; Marquardt, Florian | This talk focuses on the first applications of our deep Neural Network (NN) based approach to band structure calculations. | Session 148: Metals: Magnetic and Structural |
| 2163 | Micro-Structure and Transport Mechanism in Graphene Copper Composites | Ghimire, Raju | In this work, we analytically investigated the possibilities for an improved electrical conductivity in GN-Cu composites. | Session 148: Metals: Magnetic and Structural |
| 2164 | Low-temperature magnetic proximity effects in Mg(Al,Fe)2O4/Bi2Se3 bilayers | Riddiford, Lauren; Li, Peng; Grutter, Alexander; Suzuki, Yuri | At low temperature, below 45 K, we have found evidence of proximity-induced magnetism in the TI. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2165 | Exotic coupling in garnet-ferromagnet heterostructures | Quarterman, Patrick; Fan, Yabin; Liu, Luqiao; Grutter, Alexander | In this work, we discuss the coupling of YIG to Py and Co when grown on Si and GGG substrates by measuring the magnetic depth profile using polarized neutron reflectometry. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2166 | Angle-dependent magnetoresistance of Pt/EuO1-x thin films | Shrestha, Narendra; Murphy, Joseph; Kattel, Subash; Rice, WIlliam; Tang, Jinke | We study the magnetic and transport properties as a function of temperature and field. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2167 | Magnetoresistance and second harmonic Hall measurement of Pt/CoFe2O4 bilayers | Zhang, Zexuan; Dang, Phillip; Casamento, Joseph; Li, Xiang; Tang, Yongjian; Nan, Tianxiang; Ralph, Daniel; Xing, Huili; Jena, Debdeep | Here, we report the observation of magnetic proximity effect in ex situ sputtered Pt on MBE grown CFO (001) at room temperature. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2168 | Hydroxide-based Magneto-ionics | Quintana-Puebla, Alberto; Firme, Abigail; Jensen, Christopher; Liu, Kai | In this work, we aim to study the magneto-ionic effects in cobalt hydroxide (Co(OH) 2) / gadolinium (Gd) heterostructures. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2169 | Current-induced magnetization switching in all-oxide heterostructures | Liu, Liang; Qin, Qing; Lin, Weinan; LI, Changjian; Xie, Qidong; He, Shikun; Shu, Xinyu; Zhou, Chenghang; Lim, Zhishiuh; Yu, Jihang; Lu, Wenlai; Li, Mengsha; Yan, Xiaobing; Pennycook, Stephen; Chen, Jingsheng | Here, we combine a ferromagnetic transition metal oxide with an oxide with strong spin-orbit coupling to demonstrate all-oxide SOT devices. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2170 | Enhancement of spin-charge interconversion efficiency by interface engineering in all oxide La0.3Sr0.7MnO3/SrIrO3 system | Huang, Xiaoxi; Zhang, Hongrui; Sayed, Shehrin; Hsu, Shang-Lin; Everhardt, Arnoud; Gosavi, Tanay; Lin, Chia-Ching; Manipatruni, Sasikanth; Young, Ian; Salahuddin, Sayeef; Ralph, Daniel; Ramesh, Ramamoorthy | Enhancement of spin-charge interconversion efficiency by interface engineering in all oxide La0.3Sr0.7MnO3/SrIrO3 system | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2171 | Magnetic properties of Manganite/Iridate bilayers | Te Velthuis, Suzanne; Rosenkranz, Stephan; Wang, Xiao; Tornos, Javier; Gallego, Fernando; Keavney, David; Freeland, John; Choi, Yongseong; Strempfer, Joerg; Haskel, Daniel; Kirby, Brian; Charlton, Timothy; Santamaria, Jacobo | To probe the influence of SOC at 3d-5d complex oxide interfaces, we have investigated ferromagnetic La 0.7Sr 0.3MnO 3/SrIrO 3 bilayers deposited on SrTiO 3. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2172 | Current-manipulated propagation of spin waves in antiparallel coupled stripe domains of La 0.67 Sr 0.33 MnO 3 thin films | Yu, Haiming | We developed a theoretical model based on two oppositely oriented coupled domains, which accounts the high-frequency mode an effective antiferromagnetic spin-wave mode. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2173 | Anisotropic magnon spin diffusion length in ultra-thin spinel ferrite thin films | Li, Ruofan; Nan, Tianxiang; Li, Peng; Suzuki, Yuri; Ralph, Daniel | Here we demonstrate anisotropic magnon spin transport in coherently-strained ultra-thin epitaxial films of magnesium aluminum ferrite (MgAl 0.5Fe 1.5O 4, MAFO) with low Gilbert damping and thickness of 6 nm. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2174 | Low Magnetic Damping in Epitaxial Li0.5Fe2.5O4 Thin Films | Zheng, Xin Yu; Riddiford, Lauren; Wisser, Jacob; Suzuki, Yuri | In this talk, we demonstrate the realization of epitaxial LFO ultra-thin films (~3nm) on MgAl 2O 4 substrates with an ultra-low damping of α ≈ 0.0005 and an FMR linewidth of 7.5 Oe at 15GHz. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2175 | Interface ferromagnetism and anomalous Hall effect of CdO/ferromagnetic-insulator heterostructures | Ma, Yang | Here, we report the experimental observation of the interfacial ferromagnetism and anomalous Hall effect in the Fe3O4/CdO/Fe3O4 heterostructures grown via oxide molecular-beam epitaxy. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2176 | Structural, Magnetic and Electrical Transport Properties of YIG Thin Films with Heavily Reduced Oxygen Content | Mi, Shu; Gollapothu, Venkata; Huang, Haoliang; Lu, Yalin; Zhao, Yonggang | So far, many studies have shown that oxygen content is essential for tuning the structural and magnetic properties of YIG films [2]. | Session 149: Proximity Effects and Spin Transport in Complex Oxides |
| 2177 | Strongly correlated physics and magnetic properties in low-dimensional materials of TMPS3 | Park, Je-Guen | In this talk, I will demonstrate how we can use this unique magnetic property of these materials to learn of the old physics. | Session 150: Two-Dimensional Magnetism |
| 2178 | Probing and controlling magnetic states in 2D layered magnetic materials | Shan, Jie | In this talk, I will discuss our recent results on probing the spins, their fluctuations and dynamics in 2D transition metal trihalides. | Session 150: Two-Dimensional Magnetism |
| 2179 | A van der Waals metal thiophosphate ferromagnetic semiconductor AgVP2Se6 | Peng, Yuxuan; Cheng, XIng; Gu, Pingfan; Wang, Fanggui; Yang, Jie; Yang, Wenyun; Ye, Yu; Yang, Jinbo | A van der Waals metal thiophosphate ferromagnetic semiconductor AgVP2Se6 | Session 150: Two-Dimensional Magnetism |
| 2180 | Tunable defect-induced magnetism in Pt-based dichalcogenides | Manchanda, Priyanka; Dev, Pratibha | In this theoretical work, we show that the defect-induced magnetism in the PtSe 2 thin films is highly sensitive to: (i) the PtSe 2 layer-thickness (ii) defect density, (iii) the strain in the layer, and (iv) substrate choice. | Session 150: Two-Dimensional Magnetism |
| 2181 | Atomic-Scale Visualization of Reversible Phase Transformation in 2D Ferroelectric In2Se3 | Zhang, Fan; Wang, Zhe; Liu, Lixuan; Liu, Zhongyuan; Zhu, Wenguang; Tao, Chenggang | In 2D In 2Se 3 synthesized via CVD, we observe that In 2Se 3 layers with thickness ranging from single layer to ~20 layers stabilize at the β phase with a superstructure at room temperature. | Session 150: Two-Dimensional Magnetism |
| 2182 | Anisotropic magnetic properties of novel correlated van der-Waals materials | Aswartham, Saicharan; Selter, Sebastian; Shemerliuk, Yuliia; Wolter, Anja; Buechner, Bernd | In this talk, I will discuss about synthesis, physical properties and the tunability of their anisotropic magnetic properties of these novel TMTCs. | Session 150: Two-Dimensional Magnetism |
| 2183 | Intrinsic ferromagnetism in quasi two-dimensional chromium telluride nanoplates | Coughlin, Amanda; Yao, Yue; Ye, Zhipeng; Guo, Hua; Losovyj, Yaroslav; Fertig, Herbert; Lou, Jun; He, Rui; Li, Yan; Zhang, Shixiong | In this talk, we report on the chemical vapor deposition and magnetic studies of thin nanoplates of chromium telluride, a layered magnetic material with a non-van der Waals structure. | Session 150: Two-Dimensional Magnetism |
| 2184 | Ferromagnetism in nitrogen-doped graphene | Kabir, Mukul; Babar, Rohit | In this talk, we will systematically discuss the local moment formation and the concurrent interaction between various defect complexes. | Session 150: Two-Dimensional Magnetism |
| 2185 | Unraveling the Relationship Between Layer Stacking and Magnetic Order in Nb3X8 Systems | Bianco, Elisabeth; El Baggari, Ismail; Pasco, Christopher; Goodge, Berit; McQueen, Tyrel; Kourkoutis, lena | Here, we used controlled-temperature cryogenic scanning transmission electron microscopy (cryo-STEM) to study the re-stacking in Nb 3Br 8 with atomic-resolution. | Session 150: Two-Dimensional Magnetism |
| 2186 | High mobility in a layered antiferromagnet | Lei, Shiming; Lin, Jingjing; Jia, Yanyu; Gray, Mason; Gao, Tong; Topp, Andreas; Rodolakis, Fanny; McChesney, Jessica; Ast, Christian; Burch, Ken; Wu, Sanfeng; Ong, N. Phuan; Schoop, Leslie | In this talk, I will show how we can use chemcial rules to design a materils that can combine high mobility and magnetism and also crysaltiilizes in a strucutre with a vand der Waald gap. | Session 150: Two-Dimensional Magnetism |
| 2187 | Majorana multipole response of topological superconductors | Sato, Masatoshi | We developed a general theory of magnetic multipoles for surface helical MFs on time-reversal-invariant superconductors. | Session 151: Symmetry and Topological Superconductivity |
| 2188 | Anomalous normal fluid response in helical spin-triplet superconductor UTe2 | Bae, Seokjin; Kim, Hyunsoo; Ran, Sheng; Eo, Yun Suk; Liu, I-Lin; Fuhrman, Wesley; Paglione, Johnpierre; Butch, Nicholas; Anlage, Steven | We report evidence for a helical spin-triplet pairing state of UTe 2 with significant surface normal fluid response. | Session 151: Symmetry and Topological Superconductivity |
| 2189 | Microscopic evidence for chiral superconductivity in a heavy fermion superconductor UTe2 | Jiao, Lin; Howard, Sean; Ran, Sheng; Wang, Zhenyu; Olivares Rodriguez, Jorge; Sigrist, Manfred; Wang, Ziqiang; Butch, Nicholas; Madhavan, Vidya | In this talk I will present scanning tunneling microscopy (STM) studies of the newly discovered heavy fermion superconductor, UTe 2 with a T SC of 1.6 K. | Session 151: Symmetry and Topological Superconductivity |
| 2190 | Effects of uniaxial pressure in Uranium-based superconductors | Thomas, Sean; Santos, Frederico; Asaba, Tomoya; Bauer, Eric; Thompson, Joe; Rosa, Priscila; Ronning, Filip | Here, we probe several Uranium-based superconductors using in-situ tuning of uniaxial stress and discuss the implications of the results on the allowed pairing mechanisms. | Session 151: Symmetry and Topological Superconductivity |
| 2191 | Majorana fermions in narrow zigzag honeycomb nanoribbons | Campos, Renan; Correa, Jorge; Seridonio, Antonio; Figueira, Marcos | In this work, we study the generation of Majorana fermions in narrow zigzag honeycomb nanoribbons (ZHNR) deposited over an ‘s’ superconductor. | Session 151: Symmetry and Topological Superconductivity |
| 2192 | Atomic limit and inversion-symmetry indicators for topological superconductors | Skurativska, Anastasiia; Neupert, Titus; Fischer, Mark | Here, we introduce such a notion of atomic limit and derive a Z 2d -valued symmetry indicator for inversion- symmetric superconductors of d dimensions. | Session 151: Symmetry and Topological Superconductivity |
| 2193 | Unconventional Superconductivity in spin-3/2 fermions | Link, Julia; Boettcher, Igor; Herbut, Igor | We study unconventional superconductivity in spin-orbit-coupled three-dimensional electronic systems without inversion symmetry, featuring gapless fermions with the Hamiltonian given by H=p\cdot J, where J are the generators of total angular momentum of 3/2. | Session 151: Symmetry and Topological Superconductivity |
| 2194 | Chemical doping effect on a topological superconductor candidate | Kobayashi, Kaya; Takahashi, Takeshi; Jeschke, Harald; Akimitsu, Jun | We will report the enhancement of Tc by Bi substitution in Au 2Pb associated with the suppression of structural transitions. | Session 151: Symmetry and Topological Superconductivity |
| 2195 | Observation of half-quantum flux in topological superconductor β-Bi2Pd | Li, Yufan; Xu, Xiaoying; Lee, M.-H.; Chu, M.-W; Chien, Chia-Ling | We report the observation of half-integer magnetic flux quantization in mesoscopic rings of superconducting β-Bi 2Pd thin films [1]. | Session 151: Symmetry and Topological Superconductivity |
| 2196 | Spin-triplet Superconductivity Evidenced by Half-Integer Quantum Flux in a Non-centrosymmetric Superconductor | Xu, Xiaoying; Li, Yufan; Chien, Chia-Ling | Spin-triplet Superconductivity Evidenced by Half-Integer Quantum Flux in a Non-centrosymmetric Superconductor | Session 151: Symmetry and Topological Superconductivity |
| 2197 | Floquet higher-order topological insulators: principles and path towards realizations | Refael, Gil | In my talk I will review how these dynamical analogs of the static HOTI’s emerge, and also show how a coherently excited phonon mode can be used to support non-trivial Floquet higher-order topological phases. | Session 151: Symmetry and Topological Superconductivity |
| 2198 | Electronic Collective Modes in Twisted Bilayer Graphene | Werner, Nicholas; Bill, Andreas | We study electronic collective modes in bilayer graphene at various twist angles with a particular emphasis on low-energy plasmons. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2199 | Charge Smoothening and Band Flattening due to Hartree corrections in Twisted Bilayer Graphene | Rademaker, Louk; Mellado, Paula; Abanin, Dmitry | Here we show, using unbiased real-space self-consistent Hartree calculations on a relaxed lattice, that Coulomb interactions smoothen this charge imbalance by changing the occupation of earlier identified ‘ring’ orbitals in the AB/BA region and ‘center’ orbitals at the AA region. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2200 | Electrostatic Tuning of the Coulomb Interaction in Single Layer Graphene | Dale, Nicholas; Mori, Ryo; Utama, Iqbal; Fatuzzo, Claudia; Denlinger, Jonathan; Stansbury, Conrad; Zhao, Sihan; Lee, Kyunghoon; Taniguchi, Takashi; Watanabe, Kenji; Wang, Feng; Lanzara, Alessandra | In this talk, I will discuss recent in-operando angle-resolved photoemission studies on single layer graphene where we directly visualize modifications of its electronic band structure upon tuning the Fermi Energy. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2201 | Streamlining twisted bilayer graphene measurements | Finney, Joe; Sharpe, Aaron; Barnard, Arthur; Hsueh, Connie; Fox, Eli; Watanabe, Kenji; Taniguchi, Takashi; Kastner, Marc; Goldhaber-Gordon, David | In this work, I present a few tools we have used in order to streamline the process of making and measuring TBG samples, along with some interesting results encountered along the way. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2202 | Fabrication and Scanning Tunneling Spectroscopy of Magic Angle Twisted Bilayer Graphene | Myers, Rachel; Zhang, Zhiming; Taniguchi, Takashi; Watanabe, Kenji; LeRoy, Brian | We discuss the dry transfer technique that enables high accuracy rotational alignment that we have used to fabricate magic angle twisted bilayer graphene devices for scanning probe microscopy measurements. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2203 | Theory of Current-induced Magnetization Switching in Twisted Bilayer Graphene | He, Wenyu; Goldhaber-Gordon, David; Law, Kam Tuen | In this work, we demonstrate that, in TBGs, the twist-induced reduction of lattice symmetry allows a charge current to generate net orbital magnetization at a general filling factor through magnetoelectric effects. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2204 | Berry Curvature Dipole in Strained Graphene: a Fermi Surface Warping Effect | Battilomo, Raffaele; Scopigno, Niccolo’; Ortix, Carmine | Here, we prove that this topological effect does emerge in two-dimensional Dirac materials even in the complete absence of spin-orbit coupling. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2205 | Electron-phonon interactions in twisted bilayer graphene | Pimenta, Marcos; Eliel, Gomes; Moutinho, Marcus; Venezuela, Pedro; Righi, Ariete; Chiu, Po-Wen | We will discuss a resonance Raman study of twisted bilayer graphene (TBG) samples with different twisting angles and measured using different laser lines. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2206 | Atomistic Caculation of Electron-Phonon Coupling in Twisted Graphene Layers | Choi, Young Woo; Choi, Hyoung Joon | We investigate electron-phonon coupling in twisted graphene layers based on atomistic calculations of electronic structure, phonon dispersion, and electron-phonon matrix elements. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2207 | Observation of Substrate Induced Multiple Dirac Cones in Graphene/ SiC Heterostructure | Lu, Qiangsheng; Cook, Jacob; Zhang, Xiaoqian; Bian, Guang | In this work, we measured the electronic structure of bilayer graphene/SiC heterostructure. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2208 | Localized doping through lithium intercalation in twisted bilayer graphene | Larson, Daniel; Tritsaris, Georgios; Carr, Stephen; Kaxiras, Efthimios | Localized doping through lithium intercalation in twisted bilayer graphene | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2209 | Scanning Tunneling Microscopy Studies of Electronic Correlations in Magic Angle Twisted Bilayer Graphene | Choi, Youngjoon; Zhang, Yiran; Arora, Harpreet; Polski, Robert; Watanabe, Kenji; Taniguchi, Takashi; Nadj-Perge, Stevan | In this talk, we will present our latest STM results and discuss spatial spectroscopic maps revealing new insights into this system. | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2210 | Hofstadter butterfly and quantum Hall effect in twisted double bilayer graphene | Crosse, John A.; Koshino, Mikito; Moon, Pilkyung | In this talk, I will discuss the energy spectrum and quantum Hall effect in twisted double bilayer graphene (TDBG, a pair of Bernal-stacked bilayer graphenes stacked with a rotational stacking fault). | Session 152: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |
| 2211 | Multi-modal microscopy and spectroscopy of wide band gap semiconductors | Oliver, Rachel | Thus, I will introduce methods that allow different microscopy techniques to be brought to bear on exactly the same nanoscale structure, revealing more about its characteristics than any individual technique could achieve alone. | Session 153: Optical Probes and Imaging of Defects |
| 2212 | Far-infrared spectroscopy of shallow thermal donors and dilute impurities in high-purity silicon | Martinez, Vladimir; Tanner, David; Adhikari, Rana; Arai, Koji; Brooks, Aidan; Wipf, Christopher | Using the results of our transmission spectra, we can determine the type of impurities in the sample and their concentration. | Session 153: Optical Probes and Imaging of Defects |
| 2213 | Multidimensional Coherent Spectroscopy of Erbium Doped GaAs Quantum Wells | Boutelle, Robert; Autry, Travis; Mirin, Richard; Silverman, Kevin | To better understand the interaction of rare-earth doping, we investigate the effect of dilute erbium doping in GaAs quantum wells. | Session 153: Optical Probes and Imaging of Defects |
| 2214 | Deep UV Photoluminescence and Chemical composition Analysis of Residual Impurities in Hexagonal boron nitride | Maharjan, Nikesh; Khan, Neelam; Edgar, James; Janzen, Eli; Nakarmi, Mim | Deep UV Photoluminescence and Chemical composition Analysis of Residual Impurities in Hexagonal boron nitride | Session 153: Optical Probes and Imaging of Defects |
| 2215 | Independent determination of carrier densities and analysis of different recombination channels in GaAs PL and EL through Raman scattering of LO phonon – plasmon coupled mode | Zhang, Fan; Zhang, Yong | An ABC model is widely used to describe the carrier recombination, where the contributions of non-radiative, radiative, and Auger recombination are partitioned, respectively, into the three terms in R = An + Bn 2 + Cn 3. | Session 153: Optical Probes and Imaging of Defects |
| 2216 | Understanding the Fluorescence Mechanism of Carbon Dots through Single-Molecule Excited-State Imaging | Nguyen, Huy; Srivastava, Indrajit; Lyding, Joseph; Pan, Dipanjan; Gruebele, Martin | We employed scanning tunneling microscopy (STM) and single molecule absorption STM (SMA-STM) to study the fluorescence mechanism in carbon dots (Cdots). | Session 153: Optical Probes and Imaging of Defects |
| 2217 | Charge sensing in CMOS devices using reflectometry | Rivard, Joffrey; Godfrin, Clément; Orlov, Alexei; Dupont-Ferrier, Eva | In this talk, we report on optimization of reflectometry setups at low temperature and discuss the use of tunable capacitors for in situ tuning targeting high sensitivity RF-measurement for spin qubit readout. | Session 153: Optical Probes and Imaging of Defects |
| 2218 | Infrared Transmission of Ge:Mn Thick Films Prepared by Ion Implantation and Post-Annealing | Obied, Laila; Roorda, Sjoerd; Zhou, Shenqiang; Prucnal, Slawomir; Crandles, David | Infrared Transmission of Ge:Mn Thick Films Prepared by Ion Implantation and Post-Annealing | Session 153: Optical Probes and Imaging of Defects |
| 2219 | Photon Statistics as an Analytical Tool in Solid-State Defect Systems | Fishman, Rebecca; Patel, Raj; Hopper, David; Huang, Tzu-Yung; Bassett, Lee | We briefly discuss the history and development of photon correlation spectroscopy as a measurement tool and outline methods for proper acquisition and analysis of photon statistics. | Session 153: Optical Probes and Imaging of Defects |
| 2220 | Spatiotemporal Microwave Imaging of Photo-carrier Dynamics in Monolayer Semiconductors | Chu, Zhaodong; Wang, Chun Yuan; Quan, Jiamin; Zhang, Chenhui; Lei, Chao; Han, Ali; Ma, Xuejian; Tang, Hao-Ling; Abeysinghe, Dishan; Staab, Matthew; Zhang, Xixiang; MacDonald, Allan; Tung, vincent; Shih, Chih-Kang; Li, Xiaoqin (Elaine); Lai, Keji | Here, we report the simultaneous spatial and temporal photoconductivity imaging in WS 2 monolayers by laser-illuminated microwave impedance microscopy. | Session 153: Optical Probes and Imaging of Defects |
| 2221 | Photodegradation of Si-doped GaAs Nanowire | Pimenta, Ana Clara; Limborço, Henrique; Pérez, Juan Carlos; Taborda, Nestor; Ramos, Sérgio Luís; Matinaga, Franklin | In this work we investigated the photodegradation of a single Si-doped GaAs NW by laser heating in air. | Session 153: Optical Probes and Imaging of Defects |
| 2222 | Defect induced photoluminescence in SnO2 nanostructures: Evaluation and Utilization for optical sensing and waveguide application | SAHU, BINAYA; Juine, Rabindranath; Das, Arindam | Defect induced photoluminescence in SnO2 nanostructures: Evaluation and Utilization for optical sensing and waveguide application | Session 153: Optical Probes and Imaging of Defects |
| 2223 | Extracting spin-orbit coupling strength using realistic device simulations | Nijholt, Bas; Winkler, Georg; Vayrynen, Jukka; Wang, Guanzhong; De Lange, Gijs; Binci, Luca; Bordin, Alberto; Lutchyn, Roman | We do realistic device simulations of semiconductor nanowires and calculate the weak antilocalization correction. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2224 | Far out-of-equilibrium spin populations trigger giant spin injection into atomically thin MoS2 | Chia, Ee Min | In Co/MoS 2, by making use of the strongly out-of-equilibrium character of the injected spins, we demonstrate a highly-efficient spin injection from a ferromagnet (Co) into a semiconductor (MoS 2), thus overcoming the crippling problem of impedance mismatch. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2225 | Introducing CVD WS2 in Magnetic Tunnel Junctions | Zatko, Victor; Galbiati, Marta; Dubois, Simon; Och, Mauro; Mattevi, Cecilia; Brus, Pierre; Bezencenet, Odile; Martin, Marie-Blandine; Servet, Bernard; Charlier, Jean-Christophe; Godel, Florian; Petroff, Frédéric; Fert, Albert; Dlubak, Bruno; Seneor, Pierre | Here, we will present results on the scarcely studied WS 2 2D semiconductor for spintronics. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2226 | Defect induced magnetism in monolayer semiconducting PtSe2 | Avsar, Ahmet; Cheon, Cheol-Yeon; Pizzochero, Michele; Ciarrocchi, Alberto; Yazyev, Oleg; Kis, Andras | Here, we will present our magneto-transport measurements together with first-principles calculations which clearly demonstrate that Pt vacancy defect yields an antiferro- (ferro-)magnetic ordering in mono (bi-)layer PtSe 2. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2227 | Weak anti-localization in undoped Ge/GeSn heterostructures | Li, Jiun-Yun; Tai, Chia-Tse; Lin, Cheng-Yu; Liu, Chia-You; Wang, Tz-Ming; Harris, Charles; Lu, Tzu-Ming | In this work, we demonstrate weak anti-localization (WAL) in undoped Ge/GeSn heterostructures. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2228 | Magnetic order and anisotropy at 3d ferromagnet/2D material heterojunctions | Wei, Der-Hsin; Lu, Chun-I; Huang, Chih-Heng; Lan, YannWen; Kuo, Chien-Chen; Chuang, Tzu-Hung | I will present the experimental data followed by a brief discussion. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2229 | Spin-to-charge interconversion in van der Waals heterostructures | Safeer, CK | Using a similar approach, we observed large multidirectional SCC in Weyl semimetal MoTe 2. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2230 | Two-dimensional spin-valley locking spin valve | Tao, Lingling; Tsymbal, Evgeny | Here, we propose exploiting the spin-valley locking in 2D materials with a large spin-orbit coupling and electric field reversible valley spin polarization, such as germanene, stanene, a 1T′ transition metal dichalcogenide (TMDC) monolayer, and a 2H-TMDC bilayer, to realize a valley spin valve (VSV). | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2231 | Group-IV tellurides as a route towards all-in-one spin transistors | Slawinska, Jagoda; Cerasoli, Frank; Gopal, Priya; Curtarolo, Stefano; Buongiorno Nardelli, Marco | We propose this mechanism as an operation principle of an all-in-one spin transistor, in which spin injection/detection can be accomplished via spin Hall effects. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2232 | Atomically-resolved theory of the magnitude of the bulk Rashba effect | Mera, Carlos; Ogoshi, Elton; Fazzio, Adalberto; Dalpian, Gustavo M.; Zunger, Alex | We find an intrinsic separation between strong Rashba effect associated with anti-crossing bands, and weak Rashba effect associated with no anti-crossing bands. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2233 | All-electrical creation and control of giant spin-galvanic effect in 1T′-MoTe2/graphene heterostructures at room temperature | Hoque, Md Anamul; Khokhriakov, Dmitrii; Karpiak, Bogdan; Dash, Saroj | Here, we exploit a proximity-induced Rashba-Edelstein (REE) effect in vdW heterostructures of Weyl semimetal candidate MoTe 2 and CVD graphene, where an unprecedented gate-controlled switching of spin-galvanic effect emerges due to an efficient spin-to-charge conversion at room temperature [1]. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2234 | Highly tunable nonlinear Hall effects induced by spin-orbit couplings in strained polar transition-metal dichalcogenides | Zhang, Cheng-Ping; Zhou, Tong; Law, Kam Tuen | In this work, we show that in strained polar transition-metal dichalcogenides(TMDs) with 2H-structures, Berry curvature dipoles created by spin degrees of freedom lead to strong nonlinear Hall effects. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2235 | Research on the valley-related properties based on multilayer transition metal dichalcogenides | Guan, Hongming; Tang, Ning; Zhang, Xiaoyue; Liu, Xingchen; Ge, Weikun; Shen, Bo | In this report, by utilizing the ionic liquid (IL) covering on top of the multilayer TMDC samples, the spatial-inversion symmetry is broken by the out-of-plane electric field induced by IL. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2236 | The Electronic Properties of Quasi-One-Dimensional TiS3 and ZrS3 | Gilbert, Simeon; Yost, Andrew; Li, Mingxing; Yi, Hemian; Lipatov, Alexey; Komesu, Takashi; Avila, José; Sinitskii, Alexander; Wang, Jian; Asensio, Maria; Dowben, Peter | Here we present our work on the electronic properties of two TMTs, TiS 3 and ZrS 3, including the experimental band structure from nanospot angle resolved photoemission spectroscopy (nanoARPES). | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2237 | Origin of Magnetism in undoped and Ta doped anatase TiO2 free-standing films | Devi, Sonu; Venkatesan, Thirumalai | We have found a strong linear correlation between the observed magnetism and Ta-doping, in addition to an intrinsic contribution. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2238 | Efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal perovskite-oxide heterostructure of La0.67Sr0.33MnO3/LaAlO3/SrTiO3 | Ohya, Shinobu; Araki, Daisei; Duc Anh, Le; Kaneta, Shingo; Seki, Munetoshi; Tabata, Hitoshi; Tanaka, Masaaki | Here, we demonstrate efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal heterostructure of La 0.67Sr 0.33MnO 3/LAO/STO, which can suppress spin scattering and give us an ideal environment to investigate intrinsic spin-charge conversion. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2239 | Magnetic proximity effects in vdW heterostructures of layered materials | Gobbo, Jacob; Muzzio, Ryan; Pinchuk, Igor; Katoch, Jyoti; Singh, Simranjeet | In this talk, we will present our preliminary results in the direction of probing magnetic proximity effects in vdW based heterostructures of 2D-magnetic systems and transition metal dichalcogenides (TMDs). | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2240 | Magnetic proximity in a van der Waals heterostructure of magnetic insulator and graphene. | Karpiak, Bogdan; Cummings, Aron; Zollner, Klaus; Vila, Marc; Khokhriakov, Dmitrii; Hoque, Md Anamul; Dankert, André; Svedlindh, Peter; Fabian, Jaroslav; Roche, Stephan; Dash, Saroj | By investigating the the van der Waals heterostructures of the ferromagnetic insulator Cr 2Ge 2Te 6 and graphene, we observe an out-of-plane proximity-induced ferromagnetic exchange interaction in graphene 1. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2241 | Novel Exciton Condensation and Lorenz Number in Graphene | Nam, Sang-Boo | We present a novel condensation of boson (exciton = electron + hole) in 2 dimension at the temperature Tc = (6/π 2 ) ½ T F (fermi temperature). | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2242 | Giant spin-layer locking in novel two-dimensional X2Bi2 (X=Si, Ge, or Sn) | Lee, Seungjun; Kwon, Young-Kyun | Here, we propose novel two-dimensional materials X 2Bi 2 (X=Si, Ge, or Sn), which exhibit spin-layer locking with giant Rashba parameter value (α_R≤12.3 eV nm). | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2243 | Edgetronic and spintronic applications of carbon phosphide nanoribbon | cao, liemao; Ang, Yee Sin; Wu, Qingyun; Ang, Lay Kee | In this work, we study the electronic and transport properties of CP nanoribbons in α-phase with different edge configurations using first-principle density functional theory simulation. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2244 | Rashba spin splitting and perpendicular magnetic anisotropy of Gd-adsorbed zigzag graphene nanoribbon modulated by edge states under external electric fields | Qin, Zhenzhen; Qin, Guangzhao; Shao, Bin; Zuo, Xu | Our study introduces a new strategy to manipulate Rashba spin splitting by edge states and provides new insight into the magnetic anisotropy in 1D Rashba system. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2245 | Observation of Giant Optical Linear Dichroism and Pseudo Critical Slowing Down in van der Waals Zigzag Antiferromagnets | Hwangbo, Kyle; Zhang, Qi; Jiang, Qianni; Xiao, Di; Chu, Jiun-Haw; Xu, Xiaodong | Here, we report an optical study of an atomically thin zigzag antiferromagnet, FePS 3. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2246 | Ferromagnetism in multilayered graphite nanostructures doped with nitrogen | Manukyan, Aram; Gyulasaryan, Harutyun; Sharoyan, Eduard; Oyala, Paul; Bernal, Oscar; Kocharian, Armen | We found that the temperature dependences of saturation magnetization closely follow the behavior of integrated magnetic resonance intensity. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2247 | Modulating electronic and magnetic properties of ferromagnetic Hf2MnC2O2 MXenes | Siriwardane, Edirisuriya; Karki, Pragalv; Loh, Yen Lee; Cakir, Deniz | In this work, density functional theory calculations were carried out to evaluate the electronic and magnetic properties of the uniaxial and biaxial strains applied, and surface defects introduced Hf2MnC2O2 ferromagnetic MXene. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2248 | Raman signatures on a van der Waals antiferromagnet | Cho, Yujin; Ghosh, Subhajit; Zhao, Zhangji; Hu, Chaowei; Kang, Jin; Kargar, Fariborz; Ni, Ni; Balandin, Alexander; Wong, Chee Wei | In this project, we will correlate the optical Raman spectrum on MnBi 2Te 4 with its magnetic transition temperature (~25K) and the in-plane magnetic anisotropy. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2249 | Detection of Spin Canting Using Magnetic Field Modulated Microwave Spectroscopy. | Hojem, Alex; Wampler, James; Schuller, Ivan | Other work has shown that a magnetic response in a similar microwave spectroscopy technique can be caused by spin canting[2]. | Session 154: Spin Phenomena in Nonmagnetic 2D Materials |
| 2250 | Recent progress of Majorana zero mode in iron-based superconductors | Ding, Hong | In this talk I will report our recent progress of Majorana zero mode in iron-based superconductors. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2251 | Superconducting and topological properties of CoX (X = As, Sb and Bi) | Gao, Jiaqing; Zhang, Shunhong; Ding, Wenjun; Cui, Ping; Zhang, Zhenyu | Recent studies have revealed high transition temperature ( T c) topological superconductivity in FeSe-based superconductors in either monolayer or bulk form. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2252 | Effect of Zeeman coupling on the Majorana vortex modes in iron-based topological superconductors | Ghaemi, Pouyan; Ghazaryan, Areg; Lopes, Pedro; Hosur, Pavan; Gilbert, Matthew | To understand their origin, we examine the interplay of Zeeman coupling and superconducting pairings in three-dimensional metals with band inversion. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2253 | Exploring Higher-Order Topological Physics in FeTe0.55Se0.45 | Gray, Mason; Doyle, Meaghan; Victorin, Jazzmin; Kumar, Narendra; Zhong, Ruidan; Taniguchi, Takashi; Watanabe, Kenji; Gu, Genda; Burch, Kenneth | In this work, we expand upon recent experimental studies which provide evidence for higher-order modes in FeTe 0.55Se 0.45. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2254 | Topological Crystalline Superconductivity in Dirac Semimetal Phase of Iron-based Superconductors | Kawakami, Takuto; Sato, Masatoshi | We found that the Cooper pair between the electrons with d- and p-orbitals in this system yields odd-parity superconductivity. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2255 | Observation of conductance plateau of Majorana zero modes in Fe(Te,Se) | Kong, Lingyuan; Zhu, Shiyu; Cao, Lu; Chen, Hui; Papaj, Michal; Du, Shixuan; Xing, Yuqing; Liu, Wenyao; Wang, Dongfei; Shen, Chengmin; Yang, Fazhi; Schneeloch, John; Zhong, Ruidan; Gu, Genda; Fu, Liang; Zhang, Yuyang; Ding, Hong; Gao, Hongjun | The wavefucntion behavior of the ZBCPs and the global behavior of vortex bound states series were well studied. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2256 | FeTe1-xSex: Magnetism, electronic coherence, superconductivity, and surface state | Li, Yangmu; Zaki, Nader; Fobes, David; Xu, Zhijun; Gu, Genda; Hu, Rongwei; Petrovic, Cedomir; Savici, Andrei; Garlea, Vasile; Johnson, Peter; Tranquada, John; Zaliznyak, Igor | We apply neutron spectroscopy, together with spatially-resolved chemical and electrical analysis, to a topological superconductor candidate, FeTe 1-xSe x. Combining with photoemission spectroscopy, we obtain detailed physical and chemical information, which points to an underlying connection among magnetism, electronic coherence, superconductivity, and the topological surface state. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2257 | High-Tc Superconductor Fe(Se,Te) Monolayer: an Intrinsic, Scalable and Electrically-tunable Majorana Platform | Wu, Xianxin; Liu, Xin; Thomale, Ronny; Liu, Chaoxing | We propose to create Majorana zero modes by applying an in-plane magnetic field to the FeTe 1-xSe x monolayer and by tuning the local chemical potential via electric gating. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2258 | Zero-Energy Modes on Superconducting Bismuth Islands Deposited on Fe(Te,Se) | Wen, Hai-Hu | Here we report the easily achievable zero-energy mode on the tunneling spectra on Bi islands deposited on the Fe(Te,Se) superconducting single crystals. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2259 | Yu-Shiba-Russinov states around an excess iron in FeSe0.4Te0.6 | Machida, Tadashi; Sun, Yue; Pyon, Sunseng; Takeda, Shun; Kohsaka, Yuhki; Hanaguri, Tetsuo; Sasagawa, Takao; Tamegai, Tsuyoshi | Here, we performed high-energy resolution (~20 μeV) tunneling spectroscopy around excess irons, using a dilution-refrigerator STM [3]. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2260 | Field-free platform for Majorana modes in superconductors | Zhang, Songtian Sonia; Yin, Jiaxin; Dai, Guangyang; Jiang, Kun; Chang, Tay-Rong; Zhao, Lingxiao; Lin, Hsin; Chang, Guoqing; Chen, Genfu; Sankar, Raman; Jin, Changqing; Wang, Ziqiang; Hasan, Zahid | Here, we explore the possibility of a field-free platform by depositing magnetic impurities on the surface of candidate topological superconductors. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2261 | Topological superconducting and Majorana zero mode in a new Fe-As bilayer superconductor | Liu, Wenyao | Here I will introduce our observation in CaKFe 4As 4. | Session 155: Topological Superconductivity in Iron-based Superconductors |
| 2262 | Collective excitations of a magnetized U(1) spin liquid. | Starykh, Oleg | In this talk, I focus on the prominent metal-like magnetic insulators – U(1) quantum spin liquids with spinon Fermi surface – excitations of which are represented by neutral spin-1/2 fermions (spinons) and emergent gauge fields. | Session 156: Spin Liquids: Theory and Experiment |
| 2263 | Entangled Neutron Beams: A possible new avenue to exploring Quantum Materials | Baxter, David; Broholm, Collin; Irfan, abu ashik; Kuhn, Stephen; Lu, Shufan; Ortiz, Gerardo; Pynn, Roger; Shen, Jiazhou; Snow, William | We have recently demonstrated that the Larmor instrument at ISIS can be used to construct two and three-fold entangled states in a neutron beam [1]. | Session 156: Spin Liquids: Theory and Experiment |
| 2264 | Thermal conductivity of the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2: No evidence of mobile gapless excitations | Doiron-Leyraud, Nicolas; Bourgeois-Hope, Patrick; Laliberte, Francis; Lefrancois, Etienne; Grissonnanche, Gael; Rene de Cotret, Samuel; Gordon, Ryan; Taillefer, Louis; Cui, Hengbo; Kato, Reizo; Kitou, Shunsuke; Sawa, Hiroshi | We examined this specific issue via thermal conductivity measurements on one of the most promising QSL candidates, the organic insulator EtMe 3Sb[Pd(dmit) 2] 2 (dmit-131). | Session 156: Spin Liquids: Theory and Experiment |
| 2265 | Evidence of Frozen Moments at Low T in κ-(BEDT-TTF)2Hg(SCN)2Br | Le, Teresa; Pustogow, Andrej; Wang, Jierong; Henderson, Alyssa; Schlueter, John; Brown, Stuart | We examine the magnetic properties of κ-HgBr using 13C NMR Spectroscopy. | Session 156: Spin Liquids: Theory and Experiment |
| 2266 | Understanding Complex Magnetic Interactions Using Diffuse Neutron Scattering | Paddison, Joseph | I discuss an alternative approach to parameterize the spin Hamiltonian that does not assume long-range magnetic order: fitting interaction models to diffuse magnetic neutron-scattering data measured above T N. I demonstrate the sensitivity of this method for canonical models of bond-dependent interactions on triangular and honeycomb lattices. | Session 156: Spin Liquids: Theory and Experiment |
| 2267 | Effects of nuclear spins in the transverse-field Ising quantum magnet Ho3Mg2Sb3O14 | Mourigal, Martin; Dun, Zhiling; Bai, Xiaojian; Paddison, Joseph; Hollingworth, Emily; Demmel, Franz; Zhou, Haidong | Transverse Ising model is the simplest quantum model which can be realized in rare earth magnets with two-singlet crystal field ground state. | Session 156: Spin Liquids: Theory and Experiment |
| 2268 | Robust quantum spin liquid ground state in hydrogen-bonded organic Mott insulators | Hashimoto, Kenichiro; Shimozawa, Masaaki; Yamashita, Minoru; Ueda, Akira; Mori, Hatsumi; Sasaki, Takahiko | Here, we investigate a series of κ-H 3(Cat-X) 2 (X = EDT-TTF, EDT-ST, EDT-d4-TTF, and EDSe-TTF), where the substitution of X affects the anisotropy of the triangular lattice as well as the hydrogen-bond dynamics. | Session 156: Spin Liquids: Theory and Experiment |
| 2269 | Coherent spinon behaviour in quantum spin liquids at finite temperature | Wan, Yuan; Hart, Ollie; Castelnovo, Claudio | We consider toy models for Z2 quantum spin liquids, where the two species of excitation (dubbed spinons and visons) are mutual semions. | Session 156: Spin Liquids: Theory and Experiment |
| 2270 | Finite temperature dynamics of Coulomb spin liquids | Morampudi, Siddhardh; Laumann, Christopher; Wilczek, Frank | We compute the dynamics of spinons and photons at non-zero temperatures in multiple regimes realizable in neutron scattering and show characteristic changes as temperature is tuned across the different regimes. | Session 156: Spin Liquids: Theory and Experiment |
| 2271 | Schwinger boson approach to magnetically ordered quantum magnets | Zhang, Shang-Shun; Ghioldi, Esteban; Kamiya, Yoshitomo; Manuel, Luis; Trumper, Adolfo; Batista, Cristian | By considering a Schwinger boson theory (large- N approach) beyond the saddle-point approximation ( N = ∞), we demonstrate that the inclusion of 1/ N corrections is strictly necessary to remove unphysical modes (single-spinon poles) and to capture the true magnon modes, which emerge as two-spinon bound states (poles of the RPA propagator). | Session 156: Spin Liquids: Theory and Experiment |
| 2272 | Theoretical proposal for novel experimental probe of fractionalized excitations in two-dimensional quantum spin liquids | Choi, Wonjune; Lee, Ki; Kim, Yong-Baek | In this talk, we discuss a novel experimental protocol to identify the sharp coherent signals of each of the individual spinons to disambiguate quantum spin liquids from trivial paramagnets or magnon excitations. | Session 156: Spin Liquids: Theory and Experiment |
| 2273 | Effective theories for quantum spin clusters : State selection by singularity | Khatua, Subhankar; Sen, Diptiman; Ramachandran, Ganesh | We state a general principle — the low energy effective theory of a quantum spin cluster reduces to that of a quantum particle moving on the space of classical ground states. | Session 156: Spin Liquids: Theory and Experiment |
| 2274 | Density Matrix Renormalization Group Analysis of Quantum Spin Ice | Flynn, Michael; Baker, Thomas; Singh, Rajiv | Here we initiate the use of the Density Matrix Renormalization Group (DMRG) to study the phase diagram of quantum spin ice, focusing on the transition from an XY antiferromagnet to a U(1) spin liquid. | Session 156: Spin Liquids: Theory and Experiment |
| 2275 | Using liquid informed searches to predict high pressure and finite temperature phase transitions | Bonev, Stanimir | In this talk, I will discuss the use of structural information and/or sampling from liquid simulations to predict high pressure phase transitions and crystal structures at finite temperature conditions. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2276 | Ab initio investigation of post-PPV transitions in MgGeO3 and NaMgF3 | Umemoto, Koichiro; Wentzcovitch, Renata | We present an ab initio investigation of the pressure induced behavior of MgGeO 3 and NaMgF 3, traditional low-pressure analogs (LPAs) of MgSiO 3. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2277 | First-principles DFT molecular dynamics simulations of Fe, H, and FeH fluids in planetary interiors | Cohen, Ronald | Using density functional theory and the QUANTUM ESPRESSO code, first-principles molecular dynamics simulations have been performed over a wide range of pressures and temperatures, for pure Fe, pure H, and Fe-H solutions. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2278 | The post-perovskite transition in Fe- and Al-bearing bridgmanite: effects on seismic observables | Wentzcovitch, Renata; Valencia-Cardona, Juan; shukla, gaurav; Sarkar, Kanchan | Here, we address this transition in (Al 3+, Fe 3+)-, (Al 3+)-, (Fe 2+)- and (Fe 3+)-bearing bridgmanite using ab initio calculations, particularly the phase boundary dependence on the chemistry and acoustic velocity changes across this transformation. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2279 | Life in Extreme Environments: Material Properties of the Enzymes | Ichiye, Toshiko | To understand how the proteins necessary for life can function at extremes, we use a combination of molecular dynamics simulations of enzymes in aqueous solution, combined with experimental data, to understand how their material properties affect their biochemical activity. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2280 | Express: nonstop calculations with the Quantum ESPRESSO | Zhang, Qi; Marcondes, Michel; Wang, Hongjin; Zhuang, Jingyi; Silveira, Pedro; Wentzcovitch, Renata | Here we introduce Express, a new generation of Python and Julia workflows designed to facilitate calculations of thermoelastic and thermochemical properties of materials. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2281 | Ab initio simulation of heat and charge transport in water at planetary pT conditions | Grasselli, Federico; Stixrude, Lars; Baroni, Stefano | In this talk we report on recent results of the application of these methods to heat and charge transport in water at the extreme pT conditions occurring in the interior of icy giants, in all the different relevant phases (partially dissociated liquid, solid, and super-ionic) [4]. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2282 | First-principles predictions of electrical and thermal conductivity of liquid and solid iron at Earth core conditions | Luo, Kai; Cohen, Ronald | We use Kubo theory to compute transport properties from first-principles molecular dynamics (FPMD) simulations, incorporating scattering of electrons by disorder and thermal vibrations using density functional theory, and by other electrons using dynamical mean field theory. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2283 | Anomalous structural behaviour near a Mott transition in compressed Ca2RuO4 | Keen, Harry; Julian, Stephen; Hermann, Andreas | Here, we study the high-pressure phase evolution of Ca2RuO4 using density functional theory (DFT) and DFT+U calculations. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2284 | Theoretical Prediction of Novel Materials with the XtalOpt Evolutionary Algorithm | Wang, Xiaoyu; Avery, Patrick; Proserpio, Davide; Toher, Cormac; Curtarolo, Stefano; Zurek, Eva | The XtalOpt evolutionary algorithm for crystal structure prediction has been extended to enable the prediction of materials with specific properties. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2285 | Ab initio investigation of hydrogen-bond disorder in δ-AlOOH | Luo, Chenxing; Wan, Tianqi; Cai, Ziyu; Umemoto, Koichiro; Wentzcovitch, Renata | In this ab initio study, we address the H-bond disordering process that precedes its symmetrization from several perspectives, including a) the accuracy of standard DFT functionals to address the structural properties of δ, b) vibrational stability and the pressure-range of validity of the quasiharmonic approximation (QHA), and c) order-disorder transition using a multi-configuration QHA calculation at 300 K. With these results, we reproduce the structural behavior and the neutron diffraction peculiarities under pressure. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2286 | Thermal Conductivity of CaSiO3 Perovskite at Lower Mantle Conditions | Zhang, Zhen; Onga, Kotaro; Zhang, Dong-Bo; Ohta, Kenji; Sun, Tao; Hirose, Kei; Wentzcovitch, Renata | Here we present ab initio quantum mechanical results of this property obtained using an established phonon quasiparticle approach that can address the strongly anharmonic situation in CaPv. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2287 | Determination of Diffusion Constants and Partial Pressures in the Adsorption of Methane-Propane and Methane-Ethane Mixtures | Zachary, Valleroy; Dos Santos, Gonzalo; Lombardi, Todd; Wexler, Carlos | NG is comprised mainly of methane, thus most studies have focused on adsorption of pure methane. | Session 157: Matter in Extreme Environments: Liquids, Geological, and Complex Materials |
| 2288 | Interference effects in quanum Hall – superconductor hybrid devices | Finkelstein, Gleb; Seredinski, Andrew; Zhao, Lingfei; Arnault, Ethan; Draelos, Anne; Bondarev, Alexey; Larson, Trevyn; Wei, Ming-Tso; Li, Hengming; Watanabe, Kenji; Taniguchi, Takashi; Amet, Francois; Baranger, Harold | 1) We have developed graphene Josephson junctions with self-aligned side gates, which enable full control over the electrostatic potential near the sample edges. | Session 158: Topological Superconductivity with 1D Modes |
| 2289 | Chiral Electron-Hole Hybrid Edge Modes from the Lowest Landau Level of Proximitized Graphene | Bondarev, Alexey; Zhao, Lingfei; Baranger, Harold | We study a tight-binding model of a graphene nanoribbon in the integer quantum Hall state with one edge coupled to an s-wave superconductor. | Session 158: Topological Superconductivity with 1D Modes |
| 2290 | Hybrid quantum circuits in vertical magnetic fields | Delfanazari, Kaveh; Serra, Llorens; Ma, Pengcheng; Farrer, Ian; Ritchie, David; Joyce, Hannah; Kelly, Michael; Smith, Charles | Here, we present (i) two types of artificially engineered hybrid Josephson circuits fabrication methods, and (ii) sub-Kelvin temperature- dependent transport measurements at low and high magnetic fields B. | Session 158: Topological Superconductivity with 1D Modes |
| 2291 | Induced superconductivity in fractional quantum Hall edge | Gul, Onder; Ronen, Yuval; Lee, Si Young; Zauberman, Jonathan; Shapourian, Hassan; Dizdar, Brennan; Shin, Young Jae; Najafabadi, Danial Haei; Watanabe, Kenji; Taniguchi, Takashi; Vishwanath, Ashvin; Yacoby, Amir; Kim, Philip | Here we use high-quality van der Waals devices coupled to a narrow NbN which remains superconducting in the magnetic fields required for robust FQH. | Session 158: Topological Superconductivity with 1D Modes |
| 2292 | Platform of chiral Majorana edge modes and its quantum transport phenomena | He, James Jun; Liang, Tian; Tanaka, Yukio; Nagaosa, Naoto | We propose a method to create two-dimensional topological superconductors with a heterostructure of ferromagnet (FM), topological insulator (TI) thin film and superconductor, in which the two surfaces of the TI thin film are treated as a two-dimensional system. | Session 158: Topological Superconductivity with 1D Modes |
| 2293 | Chiral Majorana Mode in Topological Superconducting Element Hcp Thallium | Hirayama, Motoaki; Nomoto, Takuya; Arita, Ryotaro | Here, we perform the fully non-empirical calculation for the CMM considering superconductivity and surface relaxation and show that hexagonal close-packed thallium (Tl) has an ideal electronic state that harbors the CMM [1]. | Session 158: Topological Superconductivity with 1D Modes |
| 2294 | Spontaneous thermal Hall conductance in superconductors with broken time-reversal symmetry | Yilmaz, Firat; Yip, Sungkit | In this talk, we focus on an additional bulk effect, the impurity pair breaking mechanism(IPM) in superconductors (SCs). | Session 158: Topological Superconductivity with 1D Modes |
| 2295 | Microwave spectroscopy of semiconductor-nanowire-based superconducting qubits with Majorana bound states | Aguado, Ramon; Avila, Jesus; Prada, Elsa; San-Jose, Pablo | Recent experimental efforts have focused on replacing the weak link in the Josephson Junction (JJ) of a superconducting qubit by electrostatically-gateable technologies compatible with high magnetic fields. | Session 158: Topological Superconductivity with 1D Modes |
| 2296 | Decays of Majorana or Andreev Oscillations Induced by Steplike Spin-Orbit Coupling | Cao, Zhan; Zhang, Hao; L\”{u}, Hai-Feng; He, Wan-Xiu; Lu, Haizhou; Xie, Xincheng | We reveal that a steplike distribution of spin-orbit coupling in realistic devices can induce the decaying Majorana oscillations, resulting from the coupling-induced energy repulsion between the quasiparticle spectra on the two sides of the step. | Session 158: Topological Superconductivity with 1D Modes |
| 2297 | Nonlocal conductance in three-terminal hybrid Al/InSb nanowire devices | Heedt, Sebastian; Borsoi, Francesco; Quintero Perez, Marina; Fursina, Alexandra; van Loo, Nick; Badawy, Ghada; Gazibegovic, Sasa; Van Hoogdalem, Kevin; Bakkers, Erik; Kouwenhoven, Leo | We demonstrate a hard induced gap using voltage-bias spectroscopy and study the appearance of zero-bias peaks in the local conductance. | Session 158: Topological Superconductivity with 1D Modes |
| 2298 | Engineering Majorana Bound States with Periodic Structures | Woods, Benjamin; Stanescu, Tudor | Here we theoretically explore the effects of periodic potentials and periodic structures on the emergence and properties of topological superconductivity and Majorana bound states within 1D and quasi-1D systems. | Session 158: Topological Superconductivity with 1D Modes |
| 2299 | Topological Josephson effect in gate-tunable qubit devices | Antipov, Andrey; King, Cameron; Li, Kewei; Gamble, John; Bauer, Bela; Winkler, Georg; Lutchyn, Roman | In this talk I will present numerical simulations of such devices that combine superconducting proximity effect, orbital effects, electrostatic environment and realistic geometry. | Session 158: Topological Superconductivity with 1D Modes |
| 2300 | Ground State of Magic Angle Twisted Bilayer Graphene at Charge Neutrality II | Liu, Shang; Bultinck, Nick; Khalaf, Eslam; Chatterjee, Shubhayu; Vishwanath, Ashvin; Zaletel, Michael | Here, using a combination of analytical arguments and numerical calculations we identify a family of candidate insulating ground states at charge neutrality and discuss how external perturbations such as the influence of the substrate or strain can alter the phase diagram. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2301 | Marginal Fermi liquid and dynamical symmetry breaking from Coulomb interaction in twisted bilayer graphene | Gonzalez, Jose; Stauber, Tobias | We investigate the effects of the strong Coulomb interaction near the magic angle of twisted bilayer graphene, focusing on the charge neutrality point and near half-filling of the highest valence band. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2302 | Electrostatic gate-controlled fermi level dependent electronic band structure of graphene | Muzzio, Ryan; Jones, Alfred; Koch, Roland; Curcio, Davide; biswas, Deepnarayan; Miwa, Jill; Hofmann, Philip; Singh, Simranjeet; Jozwiak, Chris; Rotenberg, Eli; Bostwick, Aaron; Ulstrup, Søren; Katoch, Jyoti | We will present our results on the electrostatic gate controlled electronic band structure of graphene using nanoARPES. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2303 | Correlated states in magic angle twisted bilayer graphene under the optical conductivity scrutiny | Bascones, Elena; Calderón, María | We will show how optical conductivity measurements allow to distinguish different symmetry breaking states and to follow the evolution of the band distortions with doping. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2304 | Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures | Polshyn, Hryhoriy; Zhu, Jihang; Kumar, Manish; Taniguchi, Takashi; Watanabe, Kenji; MacDonald, Allan; Young, Andrea | We experimentally investigate twisted van der Waals heterostructures of monolayer graphene rotated with respect to a bernal stacked graphene bilayer. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2305 | Hartree Fock study of insulating states in twisted bilayer graphene using hybrid Wannier basis | Hejazi, Kasra; Chen, Xiao; Balents, Leon | In this work, the insulating behavior of twisted bilayer graphene and in particular the quantum anomalous Hall state has been studied; the effects of electron-electron interaction are taken into account by performing a Hartree-Fock analysis which is the standard approach for finding symmetry broken states. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2306 | Local electronic compressibility of magic angle twisted bilayer graphene | Zondiner, Uri; Rozen, Asaf; Rodan, Daniel; Cao, Yuan; Queiroz, Raquel; Taniguchi, Takashi; Watanabe, Kenji; Oreg, Yuval; von Oppen, Felix; Stern, Ady; Berg, Erez; Jarillo-Herrero, Pablo; Ilani, Shahal | In this talk, we probe the local electronic compressibility of MATBG using a scanning single electron transistor. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2307 | Towards correlated electron states in trilayer-graphene Moiré band | Tsai, Kan-Ting; Zhang, Xi; Zhu, Ziyan; Carr, Stephen; Luskin, Mitchell; Kim, Philip; Kaxiras, Efthimios; Wang, Ke | Beyond this model system, this work focuses on studying a new Moiré platform based on the twisted trilayer-graphene. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2308 | Band flattening in slightly twisted bilayers of Bravais networks | Kariyado, Toshikaze; Vishwanath, Ashvin | From the generic theory, we can find an interesting possibility of anisotropic band flattening, in which quasi 1D band dispersion is generated from relatively isotropic original band dispersion. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2309 | Twist disorder in twisted bilayer graphene | Wilson, Justin; Fu, Yixing; Das Sarma, Sankar; Pixley, Jed | We find that while the minibandwidth and gap are renormalized substantially, the Fermi velocity is not significantly altered. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2310 | Higher-Order Topological Insulator in Twisted Bilayer Graphene | Park, Moon Jip; Kim, Youngkuk; Cho, Gil Young; Lee, SungBin | In this work, we propose the twisted bilayer graphenes with large angles as higher-order topological insulators, hosting topological corner charges. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2311 | Topological flat bands without magic angles in massive twisted bilayer graphenes | Javvaji, Srivani; Sun, Jin-Hua; Jung, Jeil | We show that in massive twisted bilayer graphenes, isolated nearly flat bands below a threshold bandwidth W c are expected for continuous small twist angles up to a critical θ c depending on the flatness of the original bands and the interlayer coupling strength. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2312 | Attractive electron-electron interactions from internal screening in magic angle twisted bilayer graphene | Goodwin, Zachary; Mostofi, Arash; Lischner, Johannes | We have studied the effect of internal screening on electron-electron interactions and Hubbard parameters in undoped tBLG, within the random phase approximation (RPA) and constrained RPA (cRPA). | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2313 | Twistronics in bilayer graphene and other systems | Ray, Sujay | We present our work on the theory of Wannier pair in twisted bilayer graphene. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2314 | Symmetry breaking states at commensurate fillings of the Moire bands of the twisted bilayer graphene | Zhang, Yi; Jiang, Kun; Wang, Ziqiang; Zhang, Fu-Chun | We study the twisted bilayer graphene system with the continuous model together with the long-range Coulomb interaction. | Session 159: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |
| 2315 | Imaging spinons in a 2D gapless quantum spin liquid | Crommie, Michael | I will discuss how we have used scanning tunneling microscopy (STM) to image density fluctuations arising from a spin liquid Fermi surface in single-layer 1T-TaSe2, a two-dimensional Mott insulator. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2316 | Intrinsic magnetic topological insulators: MnBi2Te4 and beyond | Xu, Yong | In this perspective, I will briefly report an unexpected theoretical finding of room-temperature ferromagnetism and large-gap QAH insulators in lithium-decorated iron-based superconductor materials LiFeX (X=S, Se, Te) [9], which is awaiting for experimental proof. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2317 | Optically probing tunable topology in group V monolayers | Xu, Gaofeng; Zhou, Tong; Scharf, Benedikt; Zutic, Igor | We explain how these findings offer new opportunities for proximitized materials [3]. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2318 | Topological aspects of the band structure of monolayer \beta-Sb in flat and buckled form : Nodal line to unpinned Dirac cones. | Radha, Santosh kumar; R.L Lambrecht, Walter | Topological aspects of the band structure of monolayer \beta-Sb in flat and buckled form : Nodal line to unpinned Dirac cones. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2319 | Ab initio study of pressure-driven phase transition in FePS3 and FePSe3 | Feng, Yexin; Zheng, Yueshao | Here, we investigate the pressure-driven structural phase transitions of FePS 3 and FePSe 3 from 0 to 35 GPa by using ab initio calculations. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2320 | Van-der-Waals layered ferroelectric CuInP2S6 I: a quadruple-well potential | Tao, Lei; Brehm, John; Neumayer, Sabine; O’Hara, Andrew; Chyasnavichus, Marius; Susner, Michael; McGuire, Michael; Kalinin, Sergei; Jesse, Stephen; Ganesh, Panchapakesan; Pantelides, Sokrates; Maksymovych, Petro; Balke, Nina | Using density-functional-theory calculations, we discovered that, instead of the usual double-well potential, CIPS features a unique quadruple-well potential, with two low-polarization and two high-polarization states, with the latter corresponding to large Cu displacements to the layer surfaces, where they bond to the adjacent layers. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2321 | Van-der-Waals layered ferroelectric CuInP2S6 II: negative electrostriction and pressure-induced switching | Brehm, John; Neumayer, Sabine; Tao, Lei; O’Hara, Andrew; Chyasnavichus, Marius; Susner, Michael; McGuire, Michael; Kalinin, Sergei; Jesse, Stephen; Ganesh, Panchapakesan; Pantelides, Sokrates; Maksymovych, Petro; Balke, Nina | Here we show an even larger spectrum of peculiar behaviors, obtained via systematic analysis of nanoscale electromechanical properties with scanning probe microscopy [1]: giant negative electrostriction, coexistence of high and low polarization phases with four distinct polarization orientations, and intrinsic pressure-induced polarization switching. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2322 | Reversible electrical control of stacking order phase transition in few-layer graphene | Li, Hongyuan; Utama, Iqbal; Wang, Sheng; Zhao, Wenyu; Zhao, Sihan; Xiao, Xiao; Jiang, Yue; Jiang, Lili; Taniguchi, Takashi; Watanabe, Kenji; Weber-Bargioni, Alexander; Zettl, Alex; Wang, Feng | In this work, we demonstrate that a reversible phase transition between different layer stacking orders can be induced globally in few-layer graphene by electrostatic gating. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2323 | Electronic Properties and Polarization Profiles of Janus Transition Metal Dichalcogenides | Xie, Kaichen; Cao, Ting | In this talk, we will present our recent studies on the structural and electronic properties of Janus transition metal dichalcogenides by density functional theory calculations. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2324 | Crystallography and Properties of Atomic Chirality in Two-dimensional Helical Crystal Tellurium | Niu, Chang; Qiu, Gang; Wang, Yixiu; Qin, Jingkai; Jian, Jie; Wang, Haiyan; Wu, Wenzhuo; Ye, Peide (Peter) | Here we report that two dimensional tellurium twin flakes were identified with opposite chirality by electron crystallographic techniques (high-resolution transmission electron microscope image along different primary axes) and sulfuric acid etching method. | Session 160: Novel Phases and Phase Transitions in 2D Materials |
| 2325 | Skyrmion crystal from RKKY interaction mediated by 2DEG | Wang, Zhentao; Su, Ying; Lin, Shizeng; Batista, Cristian | In this work we show that the RKKY interaction mediated by a dilute (k F«1) 2D electron gas (2DEG) on a C 6 invariant lattice stabilizes a magnetic skyrmion crystal in the presence of magnetic field and easy-axis anisotropy. | Session 161: Skyrmion Crystals |
| 2326 | Magnetic hedgehog lattices in noncentrosymmetric metals | Okumura, Shun; Hayami, Satoru; Kato, Yasuyuki; Motome, Yukitoshi | Here we investigate the ground state of an effective spin model with long-range interactions arising from the itinerant nature of electrons by variational calculations and simulated annealing. | Session 161: Skyrmion Crystals |
| 2327 | Ordering in magnetic skyrmion lattices | Stidham, James; Pleimling, Michel | In this talk, we present recent results obtained using Langevin molecular dynamic simulations, based on a previously derived particle model of skyrmions. | Session 161: Skyrmion Crystals |
| 2328 | Formation of square skyrmion lattice in a centrosymmetric magnet without geometrical frustration | Nguyen, Khanh; Nakajima, Taro; Yu, Xiuzhen; Gao, Shang; Hirschberger, Max; Yamasaki, Yuichi; Sagayama, Hajime; Nakao, Hironori; Peng, Licong; Nakajima, Kiyomi; Shibata, Kiyou; Takagi, Rina; Arima, Taka-hisa; Tokura, Yoshinori; Seki, Shinichiro | Here, we report the observation of square skyrmion lattice for a centrosymmetric non-frustrated tetragonal magnet GdRu 2Si 2 by performing resonant x-ray scattering and Lorentz TEM experiments. | Session 161: Skyrmion Crystals |
| 2329 | Dramatic enhancement of the skyrmion phase-space of Cu2OSeO3 driven by high pressure | Deng, Liangzi; Wu, Hung-Cheng; Litvinchuk, Alexander; Yuan, Noah; Lee, Jey-Jau; Dahal, Rabin; Fu, Liang; berger, helmuth; Yang, Hung-Duen; Wu, Zheng; Gooch, Melissa; Chu, Paul C. W. | We have expanded and enhanced the skyrmion phase region from the small range of (55-58.5 K) to (5-300 K) in single crystal Cu 2OSeO 3 by pressures up to 42.1 GPa through a series of phase transitions from the cubic P2 13, through orthorhombic P2 12 12 1 and monoclinic P2 1, and finally to the triclinic P1 phase, using our newly developed ultrasensitive high pressure magnetization technique. | Session 161: Skyrmion Crystals |
| 2330 | Detection of magnetic skyrmion tubes in cubic B20 FeGe nanostructures | Mathur, Nitish; Stolt, Matthew; Yasin, Fehmi; Rybakov, Philipp; Kiselev, Nikolai S.; Yu, Xiuzhen; Jin, Song | Detection of magnetic skyrmion tubes in cubic B20 FeGe nanostructures | Session 161: Skyrmion Crystals |
| 2331 | Spectroscopic-imaging STM measurement of magnetic skyrmions in a centrosymmetric crystal | Yasui, Yuuki; Butler, Christopher; Nguyen, Khanh; Nomoto, Takuya; Hayami, Satoru; Hanaguri, Tetsuo; Motome, Yukitoshi; Arita, Ryotaro; Arima, Taka-hisa; Tokura, Yoshinori; Seki, Shinichiro | We performed spectroscopic-imaging scanning tunneling microscopy (SI-STM) measurements for a centrosymmetric crystal GdRu 2Si 2, which is expected to host magnetic skyrmions. | Session 161: Skyrmion Crystals |
| 2332 | Helical and skyrmion phases in amorphous Fe-Ge thick films | Chen, Xiaoqian; Streubel, Robert; Bouma, Dinah Simone; Koch, Roland; Kevan, Stephen; Hellman, Frances; Fischer, Peter; Roy, Sujoy | We studied amorphous Fe-Ge films using coherent resonant soft x-ray scattering. | Session 161: Skyrmion Crystals |
| 2333 | Observation of Robust Néel Skyrmions in Metallic PtMnGa | Srivastava, Abhay Kant; Devi, Parul; Sharma, Ankit; Ma, Tianping; Deniz, Hakan; Meyerheim, Holger; Felser, Claudia; Parkin, Stuart | By contrast with skyrmions observed to date, we find that the skyrmion size in PtMnGa is strongly influenced by the thickness of the lamella in which the skyrmions are observed. | Session 161: Skyrmion Crystals |
| 2334 | New low temperature phases in chiral cubic magnets | Pappas, Catherine; Qian, Fengjiao; Bannenberg, Lars; Labh, Ankit; Wilhelm, Heribert; Cubitt, Robert; Lelièvre-Berna, Eddy; Chaboussant, Gregory; DeBeer-Schmitt, Lisa; Schmidt, Marcus; Mostovoy, Maxim; Leonov, Andrey | We discuss the physical origin of this new state and suggest that it provides the in-homogeneous magnetic environment required to stabilise new low temperature skyrmionic phases. | Session 161: Skyrmion Crystals |
| 2335 | Weak crystallization of fluctuating skyrmion textures in MnSi | Kindervater, Jonas; Stasinopoulos, Ioannis; Bauer, Andreas; Haslbeck, Franz Xaver; Rucker, Felix; Chacon, Alfonso; Mühlbauer, Sebastian; Franz, Christian; Garst, Markus; Grundler, Dirk; Pfleiderer, Christian | We report an experimental study of the emergence of non-trivial topological winding and long-range order across the paramagnetic to skyrmion lattice (SkL) transition in the transition metal helimagnet MnSi. | Session 161: Skyrmion Crystals |
| 2336 | Surface Effects in the Magnetic Textures of B20 MnGe Thin Films | Repicky, Jacob; Corbett, Joseph; Liu, tao; Ahmed, Adam; Guerrero-Sanchez, Jonathan; Kawakami, Roland; Gupta, Jay | Using low-temperature (5K) spin-polarized scanning tunneling microscopy, we show that this magnetic texture is modified at the surface of MnGe thin films. | Session 161: Skyrmion Crystals |
| 2337 | Equilibrium Skyrmions and Antiskyrmions in Strained Bulk Ferromagnets at Room Temperature | Kitchaev, Daniil; Van der Ven, Anton | We use phenomenological and symmetry arguments to identify simple strain fields which may stabilize chiral skyrmions over wide temperature ranges for all crystallographic point groups. | Session 161: Skyrmion Crystals |
| 2338 | Investigating skyrmions using muon-spin spectroscopy | Lancaster, Tom; Balakrishnan, Geetha; Blundell, Stephen; Gomilsek, Matjaz; Hicken, Thomas; Huddart, Benjamin; Stefancic, Ales; Wilson, Murray | We present the results of muon-spin relaxation measurements on materials hosting a skyrmion lattice (SkL) phase. | Session 161: Skyrmion Crystals |
| 2339 | Imaging the internal spin structures of skyrmions by Lorentz scanning transmission electron microscopy | Chen, Zhen; Xu, Teng; Fuchs, Gregory; Jiang, Wanjun; Muller, David | Magnetic skyrmions are noncollinear spin textures that have been detected and studied using many different techniques. | Session 161: Skyrmion Crystals |
| 2340 | Anomalous phonon vibrations of monolayer MoS2 revealed by polarization degree of freedom of light | Huang, Teng-De; Simbulan, Kristan; Lan, YannWen; Lu, Ting-Hua | We applied elliptically polarized light in micro-Raman spectroscopy to observe variations in the relative intensity of the two most dominant Raman peaks of MoS 2. | Session 162: Physical Engineering of 2D Materials |
| 2341 | A first-principles study of the thermodynamic and vibrational properties of ReS2 under pressure | Sheremetyeva, Natalya; Tristant, Damien; Yoshimura, Anthony; Gray, Jason; Liang, Liangbo; Meunier, Vincent | Here, the effect of hydrostatic pressure on the structural, energetic, electronic, and vibrational properties of layered bulk ReS 2 was studied using density functional theory. | Session 162: Physical Engineering of 2D Materials |
| 2342 | Van der Waals and Electron Stimulated Covalent Hydrogenation of Borophene | Li, Shaowei; Rahn, Matthew; Li, Qiucheng; Hersam, Mark | The recent experimental realization of atomically thin, crystalline boron sheets has opened a new direction in the study of synthetic 2D materials. | Session 162: Physical Engineering of 2D Materials |
| 2343 | Native point defects and impurities in WSe2 | Wickramaratne, Darshana | We have studied the properties of native defects and impurities in WSe 2 using density functional theory with a hybrid functional. | Session 162: Physical Engineering of 2D Materials |
| 2344 | Discontinuous Evolution of the Structure of Stretching Polycrystalline Graphene. | D’Ambrosio, Federico; Juricic, Vladimir; Barkema, Gerard | In this talk, we show that if the graphene sheet is well-relaxed, as long as is not completely crystalline, this happens in non-linear fashion: occasionally, a tiny increase in stretching force induces a significant displacement, an avalanche-like event in which ridges and vertices are created and annihilated around the defects, which in turn can create vibrations in the surrounding medium [1]. | Session 162: Physical Engineering of 2D Materials |
| 2345 | Control of thermoelectric properties in MoSe2 thin films by using He+ irradiation | Kim, Hyuk Jin; Nguyen, Van Quang; Nguyen, Thi Huong; Lee, Yangjin; Kim, Sera; Seong, Maeng-Je; Kim, Kwanpyo; Cho, Sunglae; Chang, Young Jun | Here, we present our experimental control of both electrical conductivity and Seebeck coefficient of MoSe 2 thin films by irradiating high-energy He + ion beams. | Session 162: Physical Engineering of 2D Materials |
| 2346 | Shape – Composition – Defect Interplay in 2D Transition Metal Dichalcogenides | Srolovitz, David; Berry, Joel; Ristic, Simeon | We focus on the interplay of the 2D sheet shape via local variations in composition and/or variations in topological defect density through a combination of strain engineering and shape programming. | Session 162: Physical Engineering of 2D Materials |
| 2347 | Study of the Shape Single Crystal Graphene Growth by Chemical Vapor Deposition on Copper Foil | Nanayakkara, Tharanga; Withanage, Sajith; Wijewardena, U. Kushan; Kriisa, Annika; Samaraweera, Rasanga; Mani, Ramesh | Here, we present experimental observations of the different shapes of the micrometer-sized single-crystal graphene on copper foil obtained by the CVD technique. | Session 162: Physical Engineering of 2D Materials |
| 2348 | Coupling of Quantum Valley Hall Edge States between CVD Bilayer Graphene Layer Stacking Domain Walls | Zhang, Qicheng; Wang, Sheng; Gao, Zhaoli; Hurtado Parra, Sebastian; Das, Paul; Berry, Joel; Addison, Zachariah; Parkin, William; Drndic, Marija; Kikkawa, James; Mele, Eugene; Wang, Feng; Luo, Zhengtang; Johnson, Alan | Here we use different strain mechanisms during chemical vapor deposition (CVD) and subsequent transfer processess to create well-separated LSWs and close packing LSW bundles, and report inter-wall coupling of QVH edge states in the latter case through electron transport measurements. | Session 162: Physical Engineering of 2D Materials |
| 2349 | Preferential hole formation in WSe2 by electron beam irradiation | Shin, Donghan; O’Hara, Andrew; Lin, Junhao; Pantelides, Sokrates | We construct a comprehensive model to explain how the observed stable defects form and grow in different TMDs by calculating formation energies, displacement thresholds, and electronic structures. | Session 162: Physical Engineering of 2D Materials |
| 2350 | Structural Evolution of Many-Layer Epitaxial Graphene on 4H-SiC During Low-Energy Ion Implantation | Miceli, Paul; Mazza, Alessandro; Miettinen, Anna; Charlton, Timothy; Ward, Thomas; He, Xiaoqing; Daykin, Alex; Guha, Suchismita; Bian, Guang; Conrad, Edward | As a pathway towards these goals, we have investigated the behavior of multilayer epitaxial graphene implanted by low-energy ions (360-2000 eV) of H, D and He. | Session 162: Physical Engineering of 2D Materials |
| 2351 | Controlling Nanoscale Thermal Expansion of Monolayer Transition Metal Dichalcogenides by Alloy Engineering | Hu, Xuan; Hemmat, Zahra; Majidi, Leily; Cavin, John; Mishra, Rohan; Ogut, Serdar; Salehi-Khojin, Amin; Klie, Robert | This study provides key insights into understanding of nanoscale phenomena that control TEC values of 2D materials. | Session 162: Physical Engineering of 2D Materials |
| 2352 | Superelasticity and anomalous mechanical response of two-dimensional SiO2 under tensile and bending deformations | Nunes, Ricardo; Reina, Nestor; Chacham, Helio | In this study, we discuss results from first-principles calculations, that indicate that the recently synthetized 2D form of silica (2D-SiO 2) displays as rich a reponse to mechanical deformations as its 3D counterpart. | Session 162: Physical Engineering of 2D Materials |
| 2353 | Josephson Junctions Using Weak-Links of Topological Crystalline Insulators | Williams, James | In this talk I will elucidate the properties of Josephson junctions that use SnTe — a candidate TCI material — as the weak link. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2354 | Fusion and parity readout of Majorana bound states in lateral S-TI-S Josephson junctions | Montone, Jessica; Yue, Guang; Arias, Gilbert; Yao, Xiong; Jain, Deepti; Moon, Jisoo; Oh, Seongshik; Van Harlingen, Dale | We propose experiments designed to demonstrate the fusion of Majorana bound states (MBS) and to measure their parity in S-TI-S (Superconductor-Topological Insulator-Superconductor) lateral Josephson junctions. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2355 | Interfacial effects of proximitizing superconductivity in topological insulators | Rosen, Ilan; Andersen, Molly; Rodenbach, Linsey; Zhang, Peng; Tai, Lixuan; Yin, Gen; Kastner, Marc; Wang, Kang; Goldhaber-Gordon, David | We postulate that the properties of the interface between superconducting metals and topological insulators play a key role, and we discuss our attempts to characterize and manipulate such interfaces, focusing on the (BiSb) 2Te 3 family of topological insulators. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2356 | Interface and scattering potentials in topological insulator-superconductor heterostructures | Thareja, Eklavya; Vekhter, Ilya | We discuss the relevance of our findings to proposals for functional heterostructures. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2357 | Superconductivity in Sn1-xInxTe thin films grown by molecular beam epitaxy | Bliesener, Andrea; Feng, Junya; Taskin, Alexey; Ando, Yoichi | Using in situ post-annealing procedures, we achieve robust superconductivity. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2358 | Superconductivity of Topological Surface States and Strong Proximity Effect in Sn1- xPbxTe-Pb Heterostructures | Jia, Jinfeng; Yang, Hao; Li, Yao-Yi; Liu, Teng-Teng; Guan, Dandan; Wang, Shi-Yong; Zheng, Hao; Liu, Canhua; Fu, Liang | Here, we report the successful fabrication of atomically flat lateral and vertical Sn 1-xPb xTe-Pb heterostructures by molecular beam epitaxy. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2359 | Probing the location of Josephson vortices and the Majorana states bound to them in S-TI-S lateral Josephson junctions via Scanning SQUID Microscopy | Arias, Gilbert; Montone, Jessica; Huemiller, Erik; Yue, Guang; Van Harlingen, Dale | In this talk, we report our progress towards imaging the Josephson vortices and the currents carried by the Majorana states. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2360 | Excess Vortex-Vortex Supercurrent as Method for Readout of Majorana Parity in Fe(Se,Te) | November, Benjamin; Sau, Jay; Williams, James; Hoffman, Jennifer | Through the use of an effective two-dimensional Fu-Kane model on the surface of FeTe xSe 1-x, we approximate the ( px + ipy) superconductor as an internal s-wave proximity effect on the topological surface states. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2361 | Proximity effect at the superconducting-topological insulator interface from first principles | Park, Kyungwha; Ujfalussy, Balazs | In this study, we solve the fully relativistic Kohn-Sham-Dirac-Bogoliubov-de Gennes equations for the heterostructure by introducing Cooper pairs within the screened Korringa-Kohn-Rostoker (SKKR) method. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2362 | Multiple Pairs of Propagating Majorana Modes in the Votex Line of Superconducting Quadratic Dirac Semimetals | Hu, Lun; Qin, Shengshan; Fang, Chen; Hu, Jiangping; Zhang, Fu-Chun | We study the vortex bound states in a class of three dimensional (3D) time reversal invariant quadratic Dirac semimetals. | Session 163: Josephson Junctions with Topological Insulator Weak Links |
| 2363 | Spherical Neutron Polarimetry and the Phase Diagram of Magnetically Dilute Er2Ti2O7 | Buhariwalla, Connor; Gaudet, Jonathan; Suen, Cissy; Qureshi, Navid; Stunault, Anne; Munsie, Timothy; Dabkowska, Hanna; Gaulin, Bruce | In this talk, I will present the results of our SNP study of these 3 diluted samples, following our previous work using inelastic neutron scattering. | Session 164: Pyrochlores |
| 2364 | Magnetic phase competition in the rare-earth pyrochlore Er2Sn2O7 | Yahne, Danielle; Sanjeewa, Liurukara; Kolis, Joseph; Jaubert, Ludovic; Pereira, Darren; Enjalran, Matthew; Gingras, Michel J; Ross, Kate | In this talk, we report specific heat measurements on single crystals of Er 2Sn 2O 7 under fields applied along the three high symmetry directions, [111], [110], and [100]. | Session 164: Pyrochlores |
| 2365 | Theory of Multiple Reentrant Phenomena in the XY Pyrochlore Er2Sn2O7 | Pereira, Darren; Jaubert, Ludovic; Enjalran, Matthew; Yahne, Danielle; Ross, Kate; Gingras, Michel J | In this talk, I will discuss our efforts to understand these reentrant phenomena from the theoretical front, drawing from variational mean-field theory, classical Monte Carlo simulations, and classical spin wave analysis. | Session 164: Pyrochlores |
| 2366 | High pressure synthesis and characterization of R2Pt2O7 pyrochlores | Cheng, Jinguang | Indeed, we found enhanced magnetic ordering temperature in Gd 2Pt 2O 7 due to presence of extra superexchange pathways through the empty Pt- eg orbitals [1]. | Session 164: Pyrochlores |
| 2367 | Single crystal neutron scattering study of the pyrochlore Yb2Ge2O7 | Sarkis, Colin; Rau, Jeffrey; Sanjeewa, Duminda; Powell, Matthew; Kolis, Joseph; Marbey, Jonathan; Hill, Stephen; Rodriguez-Rivera, Jose; Nair, Harikrishnan; Gingras, Michel J; Ross, Kate | We have used the field-polarized spin waves to determine the exchange parameters for Yb 2Ge 2O 7. | Session 164: Pyrochlores |
| 2368 | Orientation Dependence of the Magnetic Phase Diagram of Yb2Ti2O7 | Säubert, Steffen; Scheie, Allen; Duvinage, Christopher; Kindervater, Jonas; Zhang, Shu; Changlani, Hitesh; Xu, Guangyong; Koohpayeh, Seyed; Tchernyshyov, Oleg; Broholm, Collin; Pfleiderer, Christian | We present the orientation dependence of the magnetic phase diagram of stoichiometric Yb 2Ti 2O 7 using four experimental probes: magnetization, heat capacity, susceptibility, and neutron scattering. | Session 164: Pyrochlores |
| 2369 | Exploring the influence of disorder on magnetic moment fragmentation | Zoghlin, Eli; Schmehr, Julian; Wilson, Stephen | Here we present an experimental exploration of the role of native disorder on the features associated with spin fragmentation in Nd2Zr2O7. | Session 164: Pyrochlores |
| 2370 | Magnetization plateaus of the quantum pyrochlore Heisenberg antiferromagnet | PAL, SANTANU; LAL, SIDDHARTHA | We predict magnetization plateaus ground states for S = 1/2 Heisenberg antiferromagnets on pyrochlore lattices by formulating arguments based on gauge and spin-parity transformations. | Session 164: Pyrochlores |
| 2371 | Magnetism of classical pyrochlore antiferromagnet Na3Mn(CO3)2Cl | Nawa, Kazuhiro; Okuyama, Daisuke; Avdeev, Maxim; Nojiri, Hiroyuki; Yoshida, Masahiro; Ueta, Daichi; Yoshizawa, Hideki; Sato, Taku | In this research, we report structural and magnetic properties together with low-temperature neutron diffraction patterns on a new pyrochlore antiferromagnet Na 3Mn(CO 3) 2Cl. | Session 164: Pyrochlores |
| 2372 | Magnetic properties of distorted pyrochlore lattice Mn2(OD)3X (X = Cl, Br) | Hagihala, Masato; Zheng, X.G.; Kamiyama, Takashi | Magnetic properties of distorted pyrochlore lattice Mn2(OD)3X (X = Cl, Br) | Session 164: Pyrochlores |
| 2373 | Magnetometry and transport studies of single crystal pyrochlore iridates | Pearce, Matthew; Goetze, Kathrin; Goddard, Paul; Lees, Martin; Prabhakaran, Dharmalingam; Boothroyd, Andrew; Sikkenk, Tycho; Szabo, Attila; Castelnovo, Claudio | We present a systematic study of the evolution of these properties with magnetic field, temperature and angle. | Session 164: Pyrochlores |
| 2374 | Magnetisation and monopole density response to applied magnetic fields in rare earth pyrochlore iridates | Szabo, Attila; Sikkenk, Tycho; Castelnovo, Claudio; Pearce, Matthew; Goetze, Kathrin; Lees, Martin; Prabhakaran, Dharmalingam; Boothroyd, Andrew; Goddard, Paul | We investigate the behaviour of rare earth pyrochlore iridates Dy2Ir2O7 and Ho2Ir2O7 using dipolar Monte Carlo simulations for the rare earth moments and an effective representation of the Ir moments as local fields [Lefrancois et al, Nat. | Session 164: Pyrochlores |
| 2375 | Study of the spin orbit coupling metal Cd2Re2O7 by torque magnetometry | Chen, Kuan-Wen; Asaba, Tomoya; Xiang, Ziji; Tinsman, Colin; Chen, Lu; Yan, Jiaqiang; Li, Lu | In this talk, we will discuss the Fermiology of Cd 2Re 2O 7 by torque magnetometry and compare with the density functional calculations. | Session 164: Pyrochlores |
| 2376 | Novel Magnetic Weyl Semimetallic State in Layered Material: Fe2Sn | Karki, Bishnu; Belbase, Bishnu; Ghimire, Madhav | Here we focus on studying the electronic, magnetic and transport properties of hexagonal Fe 2Sn. | Session 165: Weyl semimetal, theory |
| 2377 | Engineering Weyl phases and nonlinear Hall effects in Td-MoTe2 | Singh, Sobhit; Kim, Jinwoong; Rabe, Karin; Vanderbilt, David | In this work, by means of density-functional theory (DFT+U) calculations, we describe the structural phase transition between the polar T d and nonpolar 1T’ phases of MoTe 2 in reference to a hypothetical high-symmetry structure T 0 that exhibits higher-order topological features. | Session 165: Weyl semimetal, theory |
| 2378 | Multiple types of van Hove singularities induced by band inversion | Ruan, Jiawei; Wang, Huaiqiang; Louie, Steven; Zhang, Hai-Jun | We present examples of ab initio electron band structures of topological materials including monolayer 1T’-WS 2, monolayer decorated stanene, and Dirac semimetal Na 3Bi. | Session 165: Weyl semimetal, theory |
| 2379 | Cd3As2: Dirac semimetal to Weyl semimetal | Baidya, Santu; Vanderbilt, David | We calculate the evolution of the Fermi surfaces and their contributions to the anomalous Hall conductivity as a function of magnetic field and Fermi level position. | Session 165: Weyl semimetal, theory |
| 2380 | Dirac and triple point semimetallic phases in Heusler alloys | Mondal, Chiranjit; Barman, Chanchal; Pathak, Biswarup; Alam, Aftab | We predict full Heusler compounds XInPd 2 (X = Zr, Hf and Ti) to be potential candidates for type-II Dirac semimetals. | Session 165: Weyl semimetal, theory |
| 2381 | First-Principles Study of Robust Magnetic Weyl Nodal Loops in 5d Cubic Double Perovskites | Song, Young-Joon; Lee, Kwan-Woo | In this presentation, we will address a few Os-based cubic double perovskites possessing robust magnetic Weyl nodal lines (WNLs), protected by the mirror symmetry, even for considering spin-orbital coupling (SOC). | Session 165: Weyl semimetal, theory |
| 2382 | A Dirac semimetal with surface hourglass fermions: BaHgSn | Zhang, Tan; Wang, Zhijun; Weng, Hongming; Fang, Zhong | We proposed that BaHgSn is a Dirac semimetal which hosts hourglass-like surface states protected by glid symmetry. | Session 165: Weyl semimetal, theory |
| 2383 | Computational search for Dirac and Weyl nodes in f-electron antiperovskites | Pertsova, Anna; Geilhufe, R.M.; Bremholm, Martin; Balatsky, Alexander | We present the results of a computational search for three-dimensional (3D) Dirac materials in the scarcely studied group of lanthanide antiperovskites [1]. | Session 165: Weyl semimetal, theory |
| 2384 | Strain induced Kramers-Weyl Fermions | Hu, Jinxin; Xie, Yingming; Zhang, Chengping; Dai, Xi; Law, Kam Tuen | In this work, we show Kramers-Weyl fermions are easily generated by removing the degeneracy of these nodal lines through strain effects. | Session 165: Weyl semimetal, theory |
| 2385 | Insights from magnetic Weyl semimetals: the Berry phase and beyond | Yan, Binghai | We focus on the Wideman-Franz law that governs the fundamental correlation between the charge and heat transport. | Session 165: Weyl semimetal, theory |
| 2386 | Pseudo Dirac Nodal Sphere and its Topological Phase Transitions in a Semimetallic Carbon Network | Chen, Shi-Zhang; Chen, Yuan-Ping; Duan, Wenhui | Here, we present a tight-binding (TB) model in a tetragonal crystal to simulate the evolution from a nodal sphere to a nodal surface. | Session 165: Weyl semimetal, theory |
| 2387 | Topological metals induced by Zeeman effect | sun, song; Song, Zhida; Weng, Hongming; Dai, Xi | In the present work, we propose a new way to classify centrosymmetric metals by studying the Zeeman effect caused by an external magnetic field described by the momentum dependent g-factor tensor on the Fermi surfaces. | Session 165: Weyl semimetal, theory |
| 2388 | Neutron diffraction and inelastic neutron scattering in the magnetodielectric regime of Ce2O3 | Cote, Alexandra; Sethi, Astha; Kolodiazhnyi, Taras; Lynn, Jeffrey; Cooper, S. Lance; MacDougall, Greg | I will present these data in the context of existing literature, and give our conclusions about the nature of the AF ground state and spin-lattice coupling in this material. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2389 | Local polarization in oxygen-deficient LaMnO3 induced by charge localization in the Jahn-Teller distorted structure | Ricca, Chiara; Aschauer, Ulrich | Here, we show that for materials with a cooperative Jahn-Teller distortion, such as LaMnO 3 (LMO), the orbital order can also couple to the defect chemistry and induce novel material properties. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2390 | Geometrical frustration and piezoelectric response in oxide ferroics | Petkov, Valeri | We will present results from resonant high-energy x-ray diffraction experiments on exemplary sodium-potassium niobate ferroics. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2391 | Magnetic Field Dependent Local Structure of Charge-Ordered AMnO3 Perovskites | Liu, Sizhan; Abeykoon, Milinda; Tyson, Trevor | In this project, we utilize pair distribution function measurements to determine the changes in the local structure in AMnO3 perovskites when going from the charge-ordered insulating phased to the metallic phase at fixed temperature when applying an external magnetic field. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2392 | Infrared nano-spectroscopy of ferroelastic domain walls in hybrid improper ferroelectric Ca3Ti2O7 | Smith, Kevin; Nowadnick, Elizabeth; Fan, Shiyu; Khatib, Omar; Lim, Seong Joon; Gao, Bin; Harms, Nathan; Neal, Sabine; Kirkland, Justin; Martin, Michael; Won, Choong-Jae; Raschke, Markus; Cheong, Sang-Wook; Fennie, Craig; Carr, G; Bechtel, Hans; Musfeldt, Janice | In this work, we employ synchrotron-based near-field infrared nano-spectroscopy to reveal the vibrational properties of ferroelastic (90° ferroelectric) domain walls in the hybrid improper ferroelectric Ca 3Ti 2O 7. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2393 | Coupled structural distortions, domains, and control of phase competition in polar SmBaMn2O6 | Nowadnick, Elizabeth; He, Jiangang; Fennie, Craig | We use group theoretic methods and density functional theory calculations to analyze the polar crystal structure of A-site ordered SmBaMn 2O 6, which hosts a charge- and orbitally-ordered antiferromagnetic ground state. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2394 | Direct Imaging of Orbitals in Quantum Materials | Tjeng, Liu; Yavas, Hasan; Sundermann, Martin; Leedahl, Brett; Chen, Kai; Amorese, Andrea; Severing, Andrea; Gretarsson, Hlynur; Haverkort, Maurits | We will present the basic principles of s-NIXS and its experimental implementation. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2395 | Interplay of orbital selectivity and local environment in correlated materials: the case of metal-insulator transition in CaFeO3 | Pascut, Gheorghe; Coulter, Jennifer; Chandra, Premala; Rabe, Karin; Haule, Kristjan | Through the use of this method, we apply DFT+eDMFT to study the electronic-structural interplay at finite temperature, in order to describe the interplay between Mott, band and metallic-like orbitals and the local environment (characterized by the bond length and bond angle) in CaFeO 3, as it goes through the metal to insulator transition. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2396 | Atomic-scale insight into lattice and electronic modulation induced by the substitution of bismuth in iron garnet with enhanced magneto-optical effect | xu, kun; zhang, Luo; Zhang, H. W.; Zhu, Jing | In this study, Bismuth substituted lutetium iron garnet prepared by liquid epitaxial method shows large faraday rotation up to 1.64 degree/µm at 633nm at room temperature, whose structure variation and element distribution in atomic scale have been directly interpreted by using analytical scanning transmission microscopy (STEM). | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2397 | Field and Pressure Tuning the Coupling of Crystal Electric Field and Phonon Modes in Praseodymium Sesquioxide | Slimak, John; Sethi, Astha; Kolodiazhnyi, Taras; Cooper, S. Lance | To explore these results further, we present a pressure-dependent Raman scattering study of Pr2O3 aimed at tuning the coupling between electron and phonon levels to modify the low temperature phase behavior. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2398 | Deciphering Anion Order in Oxysulfide Perovskites: Origins and Implications | Hartman, Steven; Ghosh, Ayana; Mishra, Rohan; Stanek, Christopher; Uberuaga, Blas; Pilania, Ghanshyam | This talk will share insights from a first principles analysis of anion-ordered AB(O0.5S0.5)3 oxysulfide chemistries, studied in all possible anion configurations, with A=Ca,Sr,Ba and B=Ti,Zr,Hf. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2399 | Symmetry analysis of anion order, cation-vacancy order, and octahedral tilting in oxyfluoride double perovskites | Saballos, Richard; Rondinelli, James | In simple homoanionic double perovskites, the possible phase space based on octahedral tilting and cation ordering has been established and is useful in resolving known structures as well as performing computational studies to determine viable phase transitions [1] [2]. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2400 | Understanding the Appearance of Local and Long-Range Anion Order in Heteroanionic Layered Perovskites | Harada, Jaye; Rondinelli, James | We examine this issue in Ruddlesden-Popper oxyfluorides where both anion ordered and disordered structures exist, such as Sr 2FeO 3F and Sr 2ScO 3F, and fluoride preferentially occupies the apical anion site of the 2D perovskite layers. | Session 166: Local Structure and Orbital Physics in Dielectrics and Ferroics |
| 2401 | Raman scattering from current-stabilized nonequilibrium phases in Ca2RuO4 | Fuersich, Katrin; Bertinshaw, Joel; Butler, Paul; Krautloher, Maximilian; Minola, Matteo; Keimer, Bernhard | We used Raman light scattering to study the current-stabilized nonequilibrium semimetallic and metallic phases in Ca 2RuO 4. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2402 | Octahedral tilt driven Kondo lattice behavior with orbital-selective Mott transition of 4d Ca2-xSrxRuO4 | Kim, Minsoo; Kwon, Junyoung; Chung, Daun; Kim, Younsik; Yoo, Hanyoung; Jung, Jongkeun; Kim, Beom Seo; Kim, Mi Kyung; Denlinger, Jonathan; Han, Moonsup; Mizokawa, Takashi; yoshida, yoshiyuki; Kyung, Wonshik; Kim, Changyoung | Using angle-resolved photoemission spectroscopy (ARPES), we observe the HF state in orbital-selective Mott phase (OSMP) of 4 d TMO, Ca 2-xSr xRuO 4. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2403 | electric control of the structural properties of spin-orbit coupled 4d ruthenate Ca2Ru0.97Mn0.03O4 | Ye, Feng; Hoffmann, Christina; Zhao, Hengdi; Cao, Gang | In this talk, we report neutron diffraction study of the quasi-two-dimensional Mott Ca 2Ru 0.97Mn 0.03O 4, which shows dramatic reduction of the electric resistivity, suppression of the antiferromagnetic transition, and induction of new orbital order with critical current density of 0.15 A/cm 2. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2404 | Metallic and non-metallic duality in the 4d pyrochlore Lu2Rh2O7 | Hallas, Alannah | In this talk, we introduce Lu 2Rh 2O 7, a new cubic pyrochlore oxide based on 4 d 5 Rh 4+ with properties that defy simple categorization. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2405 | Anomalous Hall effect from strained-induced magnetic multipoles in antiferromagnetic material | Song, Jeongkeun; Oh, Taekoo; Kim, Woojin | [3] Here, we establish the comprehensive connection between the large AHE in antiferromagnetic in-situ pyrochlore iridate Nd 2Ir 2O 7 thin film and strain-induced magnetic multipoles, T 1-octupole. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2406 | Approaching the quantum critical point in a highly-correlated all-in-all-out antiferromagnet | Feng, Yejun; Wang, Yishu; Prabhakaran, Dharmalingam; Boothroyd, Andrew; Rosenbaum, Thomas | We find that the magnetic order is suppressed at a critical pressure P c=6.30 GPa, while the lattice symmetry remains in the cubic Fd-3m space group across the quantum critical point. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2407 | Geometric Magnetic Frustration in Y2-xBixRu2O7 Pyrochlores across the Metal-Insulator transition | Dunsiger, Sarah; Cheong, Sang-Wook; Chow, Kim; Dehn, Martin; Gheidi, Shayan; Hur, Namjung; Kim, Kee; Luke, Graeme; Morris, Gerald; Munsie, Timothy; Sonier, Jeff; Sundar, Shyam | I will describe magnetization and muon spin relaxation investigations of a series of 4 d Ru4+ based pyrochlores, which may be controllably tuned through a metal insulator transition, providing insight into the magnetic correlations as these finely balanced systems evolve from a localized to itinerant spin character. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2408 | Electrically driven inhomogeneous phase transition in CuIr2S4 | Ali, Ahmed; Adhikari, Dasharath; Alsaqqa, Ali; Kilcoyne, Colin; MATSUMOTO, Nobuhiro; Ganapathy, Sambandamurthy | Electrically driven inhomogeneous phase transition in CuIr2S4 | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2409 | Local orbital degeneracy lifting as a precursor to an orbitalselective Peierls transition | Bozin, Emil; Yin, Weiguo; Koch, Robert; Abeykoon, Milinda; Hor, Yew San; Zheng, Hong; Lei, Hechang; Petrovic, Cedomir; Mitchell, John; Billinge, Simon J | Here we use a sensitive local structural technique, x-ray atomic pair distribution function analysis, to reveal the presence of fluctuating local-structural distortions at high temperature in one such compound, CuIr 2S 4. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2410 | The spin-orbit coupling driven spectral and magnetic properties of LiOsO3: A DFT+DMFT study | Adler, Severino; Springer, Daniel; Kim, Bongjae; Liu, Peitao; Hausoel, Andreas; Franchini, Cesare; Sangiovanni, Giorgio; Toschi, Alessandro | Therefore, we performed a paramagnetic, non SOC dependent DFT and a magnetic DMFT calculation, where we tuned the atomic SOC in the Os t 2g manifold. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2411 | Survived Jeff = 3/2 state under pressure and its implication for unconventional superconductivity in GaTa4Se8: LDA+DMFT study | Jeong, Min Yong; Sim, Jae-Hoon; Lee, Hyeong Jun; Go, Ara; Han, Myung Joon | In order to understand the nature of this intriguing metallic phase and its possible relation to superconductivity, we performed the LDA+DMFT (local density approximation + dynamical mean-field theory) calculations as a function of pressure and with spin-orbit coupling taken into account. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2412 | Magnetic impurity behavior in a gapless quantum spin liquid: single-layer 1T-TaSe2 | Chen, Yi; Ruan, Wei; Hwang, Jinwoong; Wu, Meng; Tang, Shujie; Ryu, Hyejin; Louie, Steven; Lee, Patrick; Shen, Zhixun; Mo, Sung-Kwan; Crommie, Michael | Here we present scanning tunneling microscopy studies of the behavior of magnetic adatoms deposited onto the quantum spin liquid candidate single-layer 1T-TaSe 2. | Session 167: Metal-Insulator Transition in 4d/5d Systems |
| 2413 | Spectroscopic signatures of Quasi One-Dimensional Crystallization at Domain Walls in the Mott Insulator TaS2 | Aishwarya, Anuva; Howard, Sean; Padhi, Bikash; Wang, Lihai; Cheong, Sang-Wook; Phillips, Philip; Madhavan, Vidya | In this work, we use scanning tunneling microscopy at 4K to study the Mott insulator, TaS 2. | Session 167: Metal-Insulator Transition in 4d/5d Systems |