Highlights of Materials Physics (DMP) Talks @ APS 2021 March Meeting (2)
American Physics Society (APS) March meeting is one of the largest physics meetings in the world. In 2021, the meeting will be held online due to 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 | |
|---|---|---|---|---|
| 996 | Propagation Control of Octahedral tilt in Atomically Designed Oxide Heterostructures | Jeong, Seung Gyo; Han, Gyeongtak; Song, Sehwan; Min, Taewon; Mohamed, Ahmed Yousef; Park, Sungkyun; Lee, Jaekwang; Jeong, Hu Young; Kim, Young-Min; Cho, Deok-Yong; Choi, Woo Seok | Here, we propose a strategy to selectively modulate the octahedral bonding geometries via atomic-scale heterostructuring. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 997 | Emergent Structural and Vibrational Properties in SrTiO3-CaTiO3 Superlattices using Atomic-resolution Microscopy and Theory | Hoglund, Eric; Hachtel, Jordan; Beechem, Thomas; Bao, De-Liang; Piontkowski, Zachary; Caldwell, Joshua; Ihlefeld, Jon; Ravichandran, Jayakanth; O’Hara, Andrew; Matson, Joseph; Ramesh, Ramamoorthy; Pantelides, Sokrates; Hopkins, Patrick; Howe, James | Here we combine atomic-resolution scanning-transmission-electron microscopy, vibrational electron energy-loss spectroscopy, and density-functional-theory calculations to probe the phonon spectra of a series of SrTiO 3-CaTiO 3 SLs with 1 to 27 unit-cells per layer. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 998 | Strain-tuned properties of hybrid improper ferroelectric superlattices through first-principles calculations and machine learning | Shaikh, Monirul; Karmakar, Madhusudan; Ghosh, Saurabh | We have performed first-principles density functional theory (DFT) calculations and machine learning (ML) to investigate the effect of biaxial strain on ferroelectric and magnetic properties of hybrid improper ferroelectric (LaFeO 3) 1 /(LnFeO 3) 1 superlattices (SL) where Ln= La-Lu and Y. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 999 | 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 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1000 | 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 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1001 | Anomalous magnetoresistance due to longitudinal spin fluctuations in a Jeff = 1/2 Mott semiconductor | Hao, Lin; Wang, Zhentao; Yang, Junyi; Meyers, Derek; Chu, Jiun-Haw; Dean, Mark; Batista, Cristian; Liu, Jian | Here we will present the observation of a positive magnetoresistance that probes the staggered susceptibility of a Jeff = 1/2 Mott semiconductor, which is built as a strong spin-orbit coupled SrIrO3/SrTiO3 superlattice [Phys. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1002 | Structural modulated inteplay between charge and spin in the pseudospin-1/2 state within Slater-Mott crossover regime | Yang, Junyi; Hao, Lin; Zhang, Han; Pandey, Shashi; Gong, Dongliang; Liu, Jian | In virtue of epitaxial strain tuning of iridate thin films, we show that the pseudospin-1/2 electronic state is highly susceptible to structural degree of freedom, enabling an effective tuning of the electron correlation within the crossover regime. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1003 | Reviving dead layer magnetism by interface tailoring with strong spin-orbit materials | Howe, David; Saghayezhian, Mohammad; Wang, Zhen; Ali, Zeeshan; Siwakoti, Prahald; Zhu, Yimei; Plummer, E; Zhang, Jiandi | We have discovered that below the dead-layer thickness, through interfacial coupling, a strong re-entrant FM-insulating phase with very large magneto-resistance can appear. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1004 | Origin of orbital polarization in LaCoO3+LaTiO3: DFT+U and DMFT study | Lee, Alex; Ismail-Beigi, Sohrab | We systematically study the origin of the orbital polarization of Co 2+ by considering the various structural phases of (LCO) 1+(LTO) 1 superlattices and the La 2CoTiO 6 double perovskite, using density functional theory (DFT)+U and dynamical mean-field theory (DMFT) calculations. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1005 | Cooperative evolution of polar distortion and nonpolar rotation of oxygen octahedra in oxide heterostructures | Lee, Jaekwang; Min, Taewon; Seo, Jinsol; Han, Gyeongtak; Kim, Young-Min; Oh, Sang Ho; Jeong, Hu Young; Lee, Hyungwoo; Lee, Jungwoo; Eom, Kitae; Eom, Chang-Beom; Choi, Wooseon; Song, Kyung; Ryu, Sangwoo | Here, by using density functional theory (DFT) calculations, we show that the AFD and FE modes are cooperatively coupled in the (111)- oriented LAO/STO heterostructure; they coexist below the critical thickness (t c ) and disappear simultaneously above t c with the formation of 2DEG. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1006 | Octahedra rotations coupling in perovskite vanadate heterostructures | Gariglio, Stefano; Meley, Hugo; Alexander, Duncan; Triscone, Jean-Marc | In this work, we investigate by scanning transmission electron microscopy (STEM) the interface between two orthorhombic structures which display in their bulk part a different orientation of their tilt patterns. | Session 74: Magnetic and Structural Coupling Across Perovskite Interfaces and Superlattices |
| 1007 | Tunneling into topological magnets: discovery of Chern and many-body phenomena | Yin, Jiaxin | Via spectroscopic Landau quantization and edge state imaging, we discover the Chern phase in TbMn6Sn6 [1]. | Session 75: Magnetic Topological Materials 4: STM |
| 1008 | Visualizing Quantum Anomalous Hall States at the atomic scale with STM Landau Level Spectroscopy | Chong, Yi Xue; Liu, Xiaolong; Sharma, Rahul; Kostin, Andrey; Gu, Genda; Fujita, Kazuhiro; Davis, James; Sprau, Peter | Visualizing Quantum Anomalous Hall States at the atomic scale with STM Landau Level Spectroscopy | Session 75: Magnetic Topological Materials 4: STM |
| 1009 | Magnetic and transport properties of topological semimetal candidate LnSbTe (Ln = Sm, Nd) | Pandey, Krishna; Basnet, Rabindra; Acharya, Gokul; Wegner, Aaron; Nabi, Md Rafique Un; Hu, Jin | Here, we report magnetic and transport properties of previously unexplored topological nodal line semimetal candidates NdSbTe and SmSbTe. | Session 75: Magnetic Topological Materials 4: STM |
| 1010 | Anomolous transport above the magnetic transition temperature of magnetic Weyl Semimetal CeAlGe | Drucker, Nathan; Han, Fei; Nguyen, Thanh; Andrejevic, Nina; Nguyen, Quynh; Li, Mingda | We propose a mechanism for this new phase arising from the interaction between the Weyl fermions and fluctuating magnetic moments. | Session 75: Magnetic Topological Materials 4: STM |
| 1011 | Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide SrRuO3 thin film | Takiguchi, Kosuke; Wakabayashi, Yuki; Irie, Hiroshi; Krockenberger, Yoshiharu; Otsuka, Takuma; Sawada, Hiroshi; Nikolaev, Sergey; Das, Hena; Tanaka, Masaaki; taniyasu, yoshitaka; Yamamoto, Hideki | Here, we demonstrate the quantum transport evidence of the Weyl fermions in an epitaxial SrRuO 3 film with the best crystalline quality ever reported. | Session 75: Magnetic Topological Materials 4: STM |
| 1012 | The Angular Dependence of Magnetoresistance in YMn6Sn6 | Siegfried, Peter; Mazin, Igor; Jones, David; Bhandari, Hari; Ghimire, Nirmal | Here we report signatures in the magnetoresistance indicating strong coupling between the magnetic structure and the electronic band structures. | Session 75: Magnetic Topological Materials 4: STM |
| 1013 | Neutron diffraction studies on the magnetic structures of the topologically nontrivial itinerant kagome antiferromagnet, YMn6Sn6 | Dally, Rebecca; Ghimire, Nirmal; Jones, David; Michel, Dina; McGuire, Michael; Jiang, J; Mitchell, John; Lynn, Jeffrey; Mazin, Igor | Neutron diffraction studies on the magnetic structures of the topologically nontrivial itinerant kagome antiferromagnet, YMn6Sn6 | Session 75: Magnetic Topological Materials 4: STM |
| 1014 | Scanning Tunneling Microscopy and Spectroscopy Investigation of a Kagome Magnet YMn6Sn6 | Li, Hong; Zhao, He; Wang, Qi; Yin, Qiangwei; Zhao, Ning-Ning; Liu, Kai; Wang, Ziqiang; Lei, Hechang; Zeljkovic, Ilija | We use low-temperature spectroscopic-imaging scanning tunneling microscopy (SI-STM) to investigate the surface structure and low energy electronic properties of a kagome magnet YMn 6Sn 6. | Session 75: Magnetic Topological Materials 4: STM |
| 1015 | Spin-polarized scanning tunneling microscopy and quasiparticle interference imaging of the magnetic Weyl candidate CeBi | Liu, Yu; Matt, Christian; Pirie, Harris; Drucker, Nathan; Slager, Robert-Jan; Jo, Na Hyun; Kuthanazhi, Brinda; Budko, Sergey; Huang, Zhao; Lane, Christopher; Zhu, Jian-Xin; Canfield, Paul; Hoffman, Jenny | Here we focus on the ferrimagnetic and fully-polarized phases of CeBi, where our density functional theory (DFT) calculations predict several Weyl nodes near the Fermi level (EF). | Session 75: Magnetic Topological Materials 4: STM |
| 1016 | Electronic structure and quantum oscillations of the kagome metal YMn6Sn6 | Ghimire, Nirmal; Siegfried, Peter; Mazin, Igor; Kyriazi, Eleni; Tutchton, Roxanne; Singleton, John | Here we present the calculated electronic structure of YMn 6Sn 6 along with de Haas-van Alphen and Shubnikov-de Haas oscillation data in magnetic fields of up to 60 T and temperatures down to 0.5 K. | Session 75: Magnetic Topological Materials 4: STM |
| 1017 | Planar Schottky tunneling spectroscopy of antiferromagnetic kagome metal FeSn | Han, Minyong; Inoue, Hisashi; Fang, Shiang; John, Caolan; Ye, Linda; Chan, Mun; Graf, David; Suzuki, Takehito; Ghimire, Madhav; Cho, Won Joon; Kaxiras, Efthimios; Checkelsky, Joseph | We present measurements across a wide range of temperatures, barrier widths, and magnetic fields probing the underlying electronic structure. | Session 75: Magnetic Topological Materials 4: STM |
| 1018 | First-principles study of Dirac fermions in the ferromagnetic kagome metal Fe3Sn2 | Fang, Shiang; Ye, Linda; Ghimire, Madhav; Kang, Min Gu; Comin, Riccardo; Kaxiras, Efthimios; Checkelsky, Joseph | Here we present a comprehensive first-principles study of the electronic structure of Fe 3Sn 2 to clarify the origin of the observed Dirac fermions and the nature of the electronic topology in the system. | Session 75: Magnetic Topological Materials 4: STM |
| 1019 | Using nonlocal surface transport to identify the axion insulator | Chen, Rui; Li, Shuai; Sun, Hai-Peng; Lu, Haizhou; Xie, X. C. | Here, we propose a nonlocal surface transport device, in which the axion insulator can be distinguished from normal insulators without a precise measurement of the half-quantization. | Session 75: Magnetic Topological Materials 4: STM |
| 1020 | Coherent Diffraction Imaging of magnetic nanostructures using table-top and facility scale EUV/X-ray sources | Cating-Subramanian, Emma; Rana, Arjun; Liao, Chen-Ting; Lo, Yuan Hung; Bevis, Charles; Johnsen, Peter; Ryan, Sinead; Lu, Xingyuan; Gentry, Christian; Tanksalvala, Michael; Esashi, Yuka; Wang, Bin; Miao, Jianwei; Kapteyn, Henry; Murnane, Margaret | Correlative multi-modal spectro-microscopy using complementary nanoscale imaging and spectroscopic techniques at both the tabletop and facility scale provides access to a more complete range of elemental, chemical, electronic, magnetic, structural, and dynamic properties of complex samples. | Session 76: Magnetic Imaging |
| 1021 | Formation of Field-Free Skyrmion Arrays in Pt/Co/Ni/Ir-based Multilayer Thin Films | Li, Maxwell; Rai, Anish; Pokhrel, Ashok; Sapkota, Arjun; Mewes, Tim; Mewes, Claudia; De Graef, Marc; Sokalski, Vincent | Here we demonstrate a simple method to form high-density skyrmion arrays at remanence following the brief application of a large in-plane magnetic field. | Session 76: Magnetic Imaging |
| 1022 | Spin polarized STM imaging of nanoscale Néel Skyrmions in an SrIrO3/SrRuO3 Perovskite Bilayer | Corbett, Joseph; Meng, Keng-Yuan; Repicky, Jacob; Garcia-Diaz, Reyes; Rowland, James; Ahmed, Adam; Takeuchi, Noboru; Guerrero Sanchez, Jonathan; Yang, Fengyuan; Gupta, Jay | We use spin-polarized scanning tunneling microscopy to directly image isolated nanoscale Néel Skyrmions in a SrIrO 3 /SrRuO 3 bilayer system that are among the smallest reported to date in any system. | Session 76: Magnetic Imaging |
| 1023 | Evidence for a Kondo Spin Resonance in Magnetic Iron Nanoislands on Antiferromagnetic Chromium Nitride (001) | Smith, Arthur; Alam, Khan; Ponce, Rodrigo; Ma, Yingqiao; Foley, Andrew; Shrestha, Ashok; Cocoletzi, Gregorio; Takeuchi, Noboru | We have explored the electronic properties of iron nanoislands on antiferromagnetic chromium nitride substrates [1] using low-temperature (4.2K) scanning tunneling spectroscopy, and we find sharp peaks or V-dips at the Fermi level for the nanoislands which are not seen in plain iron, chromium, or chromium nitride surfaces. | Session 76: Magnetic Imaging |
| 1024 | Dynamic widefield imaging of strain using quantum defects in diamond | Dasika, Shishir; Saha, Kasturi | In this work we propose a novel device based on the wide field NV based magnetometer, which can sense strain through magneto elastic interaction and also act as probe for an array of straintronic devices. | Session 76: Magnetic Imaging |
| 1025 | NV- center magnetometry using Bayesian inference and sequential experiment design | Dushenko, Sergey; Blakley, Sean; Ambal, Kapildeb; McMichael, Robert | In magnetometry using NV – centers, we demonstrate more than order-of-magnitude speed up with sequential Bayesian experiment design as compared with the conventional frequency-swept measurements. | Session 76: Magnetic Imaging |
| 1026 | A Magnon Scattering Platform | Zhou, Tony; Carmiggelt, Joris; Gachter, Lisa; Esterlis, Ilya; Sels, Dries; Stohr, Rainer; Du, Chunhui; Fernandez, Daniel; Rodriguez-Nieva, Joaquin; Buettner, Felix; Demler, Eugene; Yacoby, Amir | Scattering techniques differ by the type of the particles used, the interaction these particles have with target materials and the range of wavelengths used. | Session 76: Magnetic Imaging |
| 1027 | Nanoscale magnetization and microwave current imaging using scanning-probe magneto-thermal microscopy* | Zhang, Chi; Bartell, Jason; Karsch, Jonathan; Gray, Isaiah; Fuchs, Gregory | We present below 100 nm spatial resolution from imaging current density around a nano-constriction, and picosecond temporal resolution enabling phase-sensitive dynamics studies. | Session 76: Magnetic Imaging |
| 1028 | Current flux imaging of a micromagnetic electrofoil | Mayes, David; Grossnickle, Maxwell; Lohmann, Mark; Li, Junxue; Aji, Vivek; Shi, Jing; Song, Justin; Gabor, Nathaniel | Similar to how tracers in a wind tunnel map the flow of air around an aerodynamic airfoil, we use a scanning laser beam as a source of directional spin and charge current to map the flow around precisely engineered wing shaped devices, or electrofoils. | Session 76: Magnetic Imaging |
| 1029 | Nitrogen-induced reconstructions on the Cr(001) surface | Ventura-Macias, Emiliano; Guerrero Sanchez, Jonathan; Corbett, Joseph; Smith, Arthur; Takeuchi, Noboru | We described different reconstructions models of N on Cr(001) using DFT calculations andSTM data. | Session 76: Magnetic Imaging |
| 1030 | Optically Probing Quantum Materials at milliKelvin Temperatures | Pai, Yun-Yi; Marvinney, Claire; Feldman, Matthew; Hua, Chengyun; Jeong, Jong-ryul; Lawrie, Benjamin | Scanning confocal microscopy offers plentiful mesoscale material information that bridges atomic-scale scanning probes and bulk characterization techniques. | Session 76: Magnetic Imaging |
| 1031 | Magnetic imaging of thin film α-Fe2O3 using a single-spin magnetometer | Guo, Qiaochu; Cheng, Yang; Zhang, Pengxiang; Gray, Isaiah; Yang, Fengyuan; Liu, Luqiao; Nowack, Katja; Fuchs, Gregory | To better understand the magnetism of α-Fe 2O 3 and how it is manipulated, here we report magnetic imaging of α-Fe 2O 3 thin films with a nitrogen-vacancy center based scanning magnetometer. | Session 76: Magnetic Imaging |
| 1032 | Topological Control of Magnetic Textures | Arava, Hanu; Barrows, Frank; Stiles, Mark; Petford-Long, Amanda | We introduce a discretized formulation of the winding number to identify the nature of the topology, associated with different magnetic configurations, in the surrounding ellipsoids. | Session 76: Magnetic Imaging |
| 1033 | Scaling behavior of the quantum phase transition from a quantum anomalous Hall insulator to an axion insulator. | Wu, Xinyu; Xiao, Di; Chen, Chuizhen; Sun, Jian; Zhang, Ling; Chan, Moses; Samarth, Nitin; Xie, X. C.; Lin, Xi; Chang, Cui-Zu | We performed the scaling behavior study of quantum phase transition from quantum anomalous Hall state(QAHS) to axion insulator state in magnetic topological insulator sandwich samples. | Session 77: Magnetic Topological Materials 6: Hall |
| 1034 | Hall viscosity, anisotropy & internal angular momentum | Rao, Pranav; Bradlyn, Barry | We describe a similar redundancy for dissipative viscosities, and present hydrodynamic implications of this for pipe flows and free surface waves. | Session 77: Magnetic Topological Materials 6: Hall |
| 1035 | Giant Anomalous Nernst Effect in Nodal Web Ferromagnets Fe3X (X = Ga, Al) | Sakai, Akito; Minami, Susumu; Koretsune, Takashi; Chen, Taishi; Higo, Tomoya; Wang, Yangming; Nomoto, Takuya; Hirayama, Motoaki; Miwa, Shinji; Nishio-Hamane, Daisuke; Ishii, Fumiyuki; Arita, Ryotaro; Nakatsuji, Satoru | In this talk, we will present the newly discovered topological magnet Fe 3 X ( X = Ga, Al) [6]. | Session 77: Magnetic Topological Materials 6: Hall |
| 1036 | Giant Anomalous Hall Effect in quasi-2D Layered Antiferromagnet Co1/3NbS2 | Tenasini, Giulia; Martino, Edoardo; Ubrig, Nicolas; Ghimire, Nirmal; Berger, Helmuth; Zaharko, Oksana; Wu, Fengcheng; Mitchell, John; Martin, Ivar; Forro, Laszlo; Morpurgo, Alberto | Here, we present experiments on the layered AFM Co 1/3NbS2, which exhibits AHE below the Néel temperature T N=29 K in bulk crystals [1]. | Session 77: Magnetic Topological Materials 6: Hall |
| 1037 | Giant Anomalous Hall Effect due to Double-Degenerate Quasi Flat Bands | Jiang, Wei; Sousa, Duarte; Wang, Jianping; Low, Tony | We propose a novel approach to achieve giant AHE in materials with flat bands (FBs). | Session 77: Magnetic Topological Materials 6: Hall |
| 1038 | Persistent currents and spin torque caused by percolated quantum spin Hall state | Zegarra, Antonio; Egues, Carlos; Chen, Wei | Motivated by recent experiments, we investigate the quantum spin Hall state in 2D topological insulator/ferromagnetic metal planar junctions by means of a tight-binding model and linear response theory. | Session 77: Magnetic Topological Materials 6: Hall |
| 1039 | A new cubic Hall viscosity in three-dimensional topological semimetals | Robredo, Iigo; Rao, Pranav; De Juan, Fernando; Bergara, Aitor; Mañes, Juan Luis; Cortijo, Alberto; Garcia Vergniory, Maia; Bradlyn, Barry | In this talk, we explore this issue for the first time by examining the viscous response of a threefold degenerate "spin-1" fermion in the cubic (magnetic) space group P2 13 (198), with time-reversal symmetry breaking chiral magnetism. | Session 77: Magnetic Topological Materials 6: Hall |
| 1040 | Longitudinal and anomalous Hall conductivity of a general two-band model | Mitscherling, Johannes | In this talk, I present a microscopic approach to the longitudinal and the anomalous Hall conductivity for a general two-band model, which captures a broad spectrum of systems with very different and rich physics like Chern insulators, ferromagnets and spiral spin density waves. | Session 77: Magnetic Topological Materials 6: Hall |
| 1041 | Quantum anomalous Hall effect in two-dimensional magnetic insulator heterojunctions | Pan, Jinbo; Yu, Jiabin; Zhang, Yanfang; Du, Shixuan; Janotti, Anderson; Liu, Chaoxing; Yan, Qimin | In this talk, we propose an alternative approach to realize the quantum anomalous Hall (QAH) effect, a typical example of a magnetic topological phase, via engineering two-dimensional (2D) magnetic van der Waals heterojunctions. | Session 77: Magnetic Topological Materials 6: Hall |
| 1042 | Unconventional Anomalous Hall Effect in a New Noncollinear Ferromagnetic Weyl Semimetal CeAlSi with Tunable Fermi Level | Yang, Hung-Yu; Singh, Bahadur; Gaudet, Jonathan; Lu, Baozhu; Huang, Cheng-Yi; Chiu, Wei-Chi; Huang, Shin-Ming; Wang, Baokai; Bahrami, Faranak; Xu, Bochao; Franklin, Jacob; Sochnikov, Ilya; Graf, David; Xu, Guangyong; Zhao, Yang; Hoffmann, Christina; Lin, Hsin; Torchinsky, Darius; Broholm, Collin; Bansil, Arun; Tafti, Fazel | Importantly, we observe an unconventional anomalous Hall effect (AHE) that appears (disappears) as the Fermi level lies close to (away from) the Weyl nodes. | Session 77: Magnetic Topological Materials 6: Hall |
| 1043 | Tuning Chern Number in Quantum Anomalous Hall Insulators | Zhao, Yifan; Zhang, Ruoxi; Mei, Ruobing; Zhou, Ling-Jie; Yi, Hemian; Zhang, Ya-Qi; Yu, Jiabin; Xiao, Run; Wang, Ke; Samarth, Nitin; Chan, Moses; Liu, Chaoxing; Chang, Cui-Zu | Here we used molecular beam epitaxy to fabricate magnetic TI multilayers and realized the well-defined QAH effect with tunable Chern number up to 5. | Session 77: Magnetic Topological Materials 6: Hall |
| 1044 | 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 77: Magnetic Topological Materials 6: Hall |
| 1045 | Unconventional anomalous Hall, Nernst and thermal Hall responses in Fe3GeTe2 | Ratkovski, Danilo; Macy, Juan; Chiu, Yu Che; Zheng, Wenkai; Casas, Brian; Choi, Eun Sang; Balicas, Luis | Here, we evaluate the anomalous Hall, Nernst and thermal responses of the layered ferromagnet Fe 3GeTe 2 as a function of the temperature and field orientation. | Session 77: Magnetic Topological Materials 6: Hall |
| 1046 | Half-integer quantized anomalous thermal Hall effect and topological Chern number in the Kitaev material 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 | We find that the thermal Hall plateau appears even for a magnetic field with no out-of-plane components, which is in stark contrast to the conventional electronic Hall effect that requires a perpendicular magnetic field. | Session 77: Magnetic Topological Materials 6: Hall |
| 1047 | Correlation Between Chiral Fluctuations and Topological Hall Effect Above Room Temperature | Dao, Tan; Zang, Jiadong | In this project, we performed the Monte Carlo simulation of a two-dimensional model of the chiral magnet and studied the correlation between Hall conductivity and the chiral fluctuations at elevated temperatures. | Session 77: Magnetic Topological Materials 6: Hall |
| 1048 | Manipulating Chiral Spin Textures in Compensated Ferrimagnets | Caretta, Lucas; Kim, Se Kwon; Ross, Caroline; Lee, Kyung-Jin; Beach, Geoffrey | A promising approach to encode bits of information for next-generation memory and logic is by using solitons, such as domain walls (DW) or topological skyrmions, which can be translated by currents across racetrack-like wire devices. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1049 | Current-induced spin-orbit torque switching of chiral magnetization across a synthetic antiferromagnet with built-in planar asymmetry | Wang, Kang; Qian, Lijuan; Ying, Seechen; Xiao, Gang | In this talk, we discuss about the nature and control of chiral magnetization across a synthetic antiferromagnet (SAF) where an interlayer DMI is present between magnetic layers separated by a heavy-metal spacer. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1050 | Spin waves in an antiferromanget with a local triangular symmetry | Dasgupta, Sayak; Tchernyshyov, Oleg | We apply this approach to the compounds of the Mn 3X family with stacked kagome layers and extract the exchange coefficients for a model spin Hamiltonian by fitting to neutron scattering data [2]. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1051 | Interfacial Dzyaloshinskii-Moriya Interaction of Collinear Antiferromagnets MnPt and NiO on W, Re, and Au | Akanda, Md. Rakibul Karim; Park, In Jun; Lake, Roger | Interfacial Dzyaloshinskii-Moriya Interaction of Collinear Antiferromagnets MnPt and NiO on W, Re, and Au | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1052 | Magnon-phonon hybridization in the quasi-2D antiferromagnet MnPSe3 | Mai, Thuc; Garrity, Kevin; McCreary, Amber; Nguyen, Nhan; Argo, Josh; Simpson, Jeffrey; Doan-Nguyen, Vicky; Valdes Aguilar, Rolando; Hight Walker, Angela | We construct a model that reproduces our observations and demonstrates that the phonons and two-magnon excitations are hybridized in the magnetically ordered state. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1053 | Coupled Skyrmion Breathing Modes in Synthetic Ferri- and Antiferromagnets | Lonsky, Martin; Hoffmann, Axel | Here, we present micromagnetic simulations of these resonance modes in synthetic ferri- and antiferromagnets. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1054 | Role of interlayer interactions in the recovery of synthetic ferrimagnetic skyrmions in [Co/Gd/Pt]n multilayers after cycling through the spin reorientation transition | Stuart, Alexandra; Wang, Xiao; Fiagbenu, Adzo; Buchanan, Kristen; Cheng, Xuemei | Here we use micromagnetic simulations to gain insight into a spin memory effect that was recently demonstrated experimentally for synthetic AFM skyrmion pairs in [Co/Gd/Pt] n=10 multilayered thin films. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1055 | Effects of geometry on curvilinear antiferromagnetic spin chains | Pylypovskyi, Oleksandr; Kononenko, Denys; Yershov, Kostiantyn; Roessler, Ulrich; Fassbender, Juergen; Van den Brink, Jeroen; Makarov, Dennis; Sheka, Denis | Here, we explore geometry-induced effects in curvilinear antiferromagnets. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1056 | Antiferromagnetic Skyrmions and Skyrmion Density Wave in Rashba Hund’s Insulator. | Mukherjee, Arnob; Kathyat, Deepak; Kumar, Sanjeev | The results are based on unbiased simulations of a classical super-exchange model derived, in this work, from a realistic microscopic electronic Hamiltonian. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1057 | Controlling long-range skyrmion lattices using field and temperature in Fe/Gd multilayers | DeBeer-Schmitt, Lisa; Desautels, Ryan; Tang, Nan; Montoya, Sergio; Liyanage, W.L.N.C; Patel, Sheena; Fitzsimmons, Michael; Fullerton, Eric; Borchers, Julie; Gilbert, Dustin | Using small angle neutron scattering (SANS), we demonstrate a skyrmion lattice exists over a broad field and temperature range (including positive/negative/zero magnetic field and temperatures between 10K and 325 K, in a single film). | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1058 | Spin texture dynamics in amorphous Fe-Ge films | Chen, Xiaoqian; Streubel, Robert; Bouma, Dinah Simone; Koch, Roland; Morley, Sophie; Kevan, Stephen; Hellman, Frances; Fischer, Peter; Roy, Sujoy | We used resonant coherent x-ray scattering and studied magnetic order parameters and spin texture dynamics across two magnetic phase transitions in a-FeGe. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1059 | Stabilization of zero-field skyrmions in synthetic antiferromagnetic multilayers | Sim, May Inn; Thian, Dickson; Chen, Xiaoye; Ho, Pin; Tan, Hang Khume; Li, Chao; Maddu, Ramu; Sarjoosing, Goolaup; Lim Chee Beng, Nelson; Lee Koon Yap, Sherry; Soumyanarayanan, Anjan | This work demonstrates the field-free stabilization of synthetic AF (SAF) Sks at RT mediated by a Ir heavy metal spacer between ferromagnetic (FM) Ir/Fe/Co/Pt MLs. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1060 | Reversible Skyrmion Logic System | Hu, Xuan; Chauwin, Maverick; Garcia-Sanchez, Felipe; Betrabet, Neilesh; Paler, Alexandru; Moutafis, Christoforos; Friedman, Joseph | Here we propose a reversible skyrmion logic system with which we demonstrate a direct cascading mechanism, enabling a large-scale reversible skyrmion computing system [1]. | Session 78: Skyrmions in Ferrimagnets and Antiferromagnets |
| 1061 | Topological structures of and for light | Kuipers, Kobus | In this lecture I will address two illustrations of topological protection in light fields. | Session 79: Nanostructures and Metamaterials |
| 1062 | Topological phases of electromagnetic waves in superlattices of negative- and positive- epsilon materials | Okamoto, Akihiro; Nakata, Yosuke; Murakami, Shuichi | In the work of [3], the topological interface mode is reported due to the Zak phase. | Session 79: Nanostructures and Metamaterials |
| 1063 | Flat bands in magic-angle vibrating plates | Rosendo, María; Peñaranda, Fernando; Christensen, Johan; San-Jose, Pablo | In this work we propose a mechanical analogue of twisted bilayer graphene made of two vibrating plates, patterned with a honeycomb mesh of masses, and coupled across a continuum elastic medium. | Session 79: Nanostructures and Metamaterials |
| 1064 | Spatially shaping waves deep inside a forbidden gap | Uppu, Ravitej; Adhikary, Manashee; Harteveld, Cornelis; Vos, Willem | Breaking this convention, here we demonstrate the ability to send waves much deeper into crystals. | Session 79: Nanostructures and Metamaterials |
| 1065 | The role of the electrostatic interlayer interaction in SiC/GeC heterostructures | Tasnim, Kazi Jannatul; Alharbi, Safia Abdullah R; Musa, Md Rajib khan; Lovell, Simon Hosch; Akridge, Zachary Alexander; Yu, Ming | In this preliminary study, we have investigated the structural stability of 2D SiC/GeC bilayer heterostructure with different stacking and out-of-plane species ordering within the framework of density functional theory. | Session 79: Nanostructures and Metamaterials |
| 1066 | Fundamental Limits to Performance of Photonic Nanostructures via Hierarchical Mean-Field Constraints: Upper Bounds on Scattering, Absorption, and Purcell Enhancement | Chao, Pengning; Molesky, Sean; Jin, Weiliang; Rodriguez, Alejandro | We present a general method for computing fundamental limits on photonic design objectives that apply to arbitrary structures dependent only on the material the structure is made of and its maximum footprint. | Session 79: Nanostructures and Metamaterials |
| 1067 | Hyperbolic phonon polaritons in calcite for nanoscale infrared confinement | Breslin, Vanessa; Ratchford, Daniel; Giles, Alexander; Dunkelberger, Adam; Owrutsky, Jeffrey | Here, we report on the first observation of hyperbolic phonon polaritons (HPs) in calcite nanopillar arrays, demonstrate the aspect ratio dependence of the HP resonance frequencies, discuss fabrication challenges, and compare our results to numerical simulations and analytical models. | Session 79: Nanostructures and Metamaterials |
| 1068 | Optically tunable topological photonic structures | Litchinitser, Natalia | Their 2020 abstract is below: Photonic topological insulators offer the possibility to eliminate backscattering losses and improve the efficiency of optical communication systems. | Session 79: Nanostructures and Metamaterials |
| 1069 | Tri- and Tetrahyperbolic Anisotropic and Bianisotropic Optical Metamaterials | Durach, Maxim | In this work we introduce a complete taxonomy of optical metamaterials and show that all optical materials belong to one of the following topological classes: tetra-, tri-, bi-, mono- or non-hyperbolic, which includes 2 novel classes – the tetra- and trihyperbolic metamaterials [3]. | Session 79: Nanostructures and Metamaterials |
| 1070 | Type-III nodal loops and topological phase transition at metasurfaces. | Li, Haitao; Hou, Bo; Hu, Chaundeng | Here, we experimentally demonstrate a NL degeneracy at a metasurface with bilayer subwavelength fractal pattern. | Session 79: Nanostructures and Metamaterials |
| 1071 | Observation of bound photonic drumhead surface state in the radiation continuum | Wang, Yu; Zhou, Xiaoxi; Hou, Bo | Based on the temporal coupled-mode theory, we numerically obtain the radiative quality factor (Q r) of the DSS from reflection spectrum. | Session 79: Nanostructures and Metamaterials |
| 1072 | Shaping an enhanced and highly directional thermal emission with localized surface phonon polariton resonances (LSPhPs) | Foteinopoulou, Stavroula; Devarapu, Ganga Chinna Rao | We show here how to utilize individual LSPhP resonances in a judiciously designed structure to achieve a highly forward thermal emission enhanced by an order of magnitude with respect to the bulk homogenous material. | Session 79: Nanostructures and Metamaterials |
| 1073 | Controlling the scattering of light with magnetic textures | Chioar, Ioan-Augustin; Vantaraki, Christina; Pohlit, Merlin; Rowan-Robinson, Richard; Hjörvarsson, Björgvin; Papaioannou, Evangelos Th.; Kapaklis, Vassilios | We explored the use of a magnetic film of Y 3Fe 5O 12 for steering light with mesoscale magnetic textures. | Session 79: Nanostructures and Metamaterials |
| 1074 | Consistent Multiphysics analysis of direct-bandgap semiconductor structures. | Semichaevsky, Andrey | This work presents a Multiphysics method for the analysis of III-V semiconductor-based structured surfaces. | Session 79: Nanostructures and Metamaterials |
| 1075 | 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 79: Nanostructures and Metamaterials |
| 1076 | High-temperature silicon thermal diode and switch | Kasprzak, Maciej; Sledzinska, Marianna; Zaleski, Karol; Iatsunskyi, Igor; Alzina, Francesc; Volz, Sebastian; Sotomayor Torres, Clivia; Graczykowski, Bartlomiej | In this work we demonstrate a single-material thermal diode operating at high temperatures. | Session 79: Nanostructures and Metamaterials |
| 1077 | Imaging the Motion of a Graphene Nanomechanical Resonator Network | Carter, Brittany; Horowitz, Viva; Miller, David; Blaikie, Andrew; Aleman, Benjamin | Here we develop a means to identify which resonators are coupled by imaging the network’s amplitude and phase for each spectral peak with scanning interferometric microscopy (SIM). | Session 79: Nanostructures and Metamaterials |
| 1078 | Stoichiometry of the Core Determines the Electronic Structure of Environmentally Friendly Core-Shell III–V/II-VI Nanoparticles | Rusishvili, Mariami; Wippermann, Stefan; Talapin, Dmitri; Galli, Giulia | Here we present a computational study of the opto-electronic properties of In xP z and In xGa yP z QDs interfaced with zinc chalcogenide shells[1]. | Session 79: Nanostructures and Metamaterials |
| 1079 | Simultaneous Generation of Arbitrary Assembly of Polarization States for On-Chip Quantum Information Technology | Gao, Yajun; Peng, Ruwen; Wang, Mu | Here we report on simultaneous generation of different types of polarization states with a single piece of metasurface. | Session 79: Nanostructures and Metamaterials |
| 1080 | Large Scale Optical Metamaterials for Energy and Sustainability | Yin, Xiaobo | In this talk, I will give an overview of our research and, more specifically, present our recent development on how judiciously structured photonic materials address the challenge of the tremendous power hungry for space cooling and promote photosynthesis and crop yield in greenhouses. | Session 79: Nanostructures and Metamaterials |
| 1081 | Broadband, Non-resonant Platform for Electric field Enhancement | Subramania, Ganapathi; Foteinopoulou, Stavroula | We will describe recent developments in the fabrication and optical response of broadband electric field enhancement structure. | Session 79: Nanostructures and Metamaterials |
| 1082 | Highly Stable Perovskite Supercrystals via Oil-in-Oil Templating | Tang, Yingying; Schall, Peter | Here, we report the large-scale assembly control of spherical, cubic, and hexagonal SCs of inorganic perovskite NCs through templating by oil-in-oil emulsions. | Session 79: Nanostructures and Metamaterials |
| 1083 | Non-linear Optical Properties of Nanostructured Metamaterials. | Meza, Ulises; Mendoza Santoyo, Bernardo; Mochan, W | We present a theoretical study of second harmonic generation (SHG) in structured metamaterials; particularly, an array of cross-shaped vacuum inclusions within a silver host. | Session 79: Nanostructures and Metamaterials |
| 1084 | Polariton lasing in nonresonantly driven coupled planar microcavities | Sawicki, Krzysztof; Sturges, Thomas; Sciesiek, Maciej; Kazimierczuk, Tomasz; Sobczak, Kamil; Pacuski, Wojciech; Nawrocki, Michal; Suffczynski, Jan | We demonstrate Bose-Einstein condensation of polaritons and dual-wavelength polariton lasing in a non-resonantly driven, vertically coupled microcavities. | Session 79: Nanostructures and Metamaterials |
| 1085 | Light-Cone Surface Lattice Resonances Enable Rotationally Tunable Edge Lasing | Guan, Jun; Bourgeois, Marc; Li, Ran; Hu, Jingtian; Schaller, Richard; Schatz, George; Odom, Teri | This talk describes how the discovery of light-cone surface lattice resonances (SLRs) enables tunable edge-emitting lasing. | Session 79: Nanostructures and Metamaterials |
| 1086 | DC Flux Dependance of Intermodulation Products in Nonlinear RF-SQUID Metamaterials | Zack, Ethan; Chitzanidis, Johanne; Lazarides, Nikos | This presentation will compare experimental data of the DC flux dependence to several numerical and analytic models of the rf-SQUID. | Session 79: Nanostructures and Metamaterials |
| 1087 | Realizing Anderson localization of surface plasmon polaritons and enhancing their interactions with excitons in disordered nanostructures | Peng, Ruwen; Xiong, Bo; Fan, Ren-Hao; Wang, Mu | In this work, we experimentally demonstrate the Anderson localization of SPPs at optical frequencies in both 1D and 2D nanostructures. | Session 79: Nanostructures and Metamaterials |
| 1088 | Exciton-plasmon coupling in ultrathin periodically aligned carbon nanotube arrays. | Adhikari, Chandra; Bondarev, Igor | We study theoretically the in-plane electromagnetic response and the exciton-plasmon interactions for an experimentally feasible carbon nanotube (CN) film systems composed of parallel aligned periodic semiconducting CN arrays embedded in an ultrathin finite-thickness dielectric[1,2]. | Session 79: Nanostructures and Metamaterials |
| 1089 | Controlling photonic quantum states by a metasurface | Li, Quanwei; Bao, Wei; Nie, Zhaoyu; Xia, Yang; Xue, Yahui; Wang, Yuan; Yang, Sui; Zhang, Xiang | In this talk, we will present our proposal and experimental demonstration of manipulating photonic quantum states enabled by an unprecedented design of metasurface. | Session 79: Nanostructures and Metamaterials |
| 1090 | Nonlinear Optical Effects with Polariton Lasers in a GaAs Microcavity | Pimenta, Ana Clara; Faria, Luana; Pérez, Juan Carlos; De Giogi, Milena; Sanvitto, Daniele; Matinaga, Franklin | Here, we present experimental observations of the second harmonic generation from polaritons in a GaAs microcavity, which exhibit a 2 order higher efficiency than those from the usual method. | Session 79: Nanostructures and Metamaterials |
| 1091 | 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 79: Nanostructures and Metamaterials |
| 1092 | Spontaneous emission dynamics of Eu3+ ions coupled to hyperbolic metamaterials | López-Morales, Gabriel; Li, Mingxing; Yadav, Ravindra; Kalluru, Harshavardhan; Basu, Jaydeep; Meriles, Carlos; Menon, Vinod | We investigate a system comprising of Eu 3+(NO 3) 3 nanocrystals on a hyperbolic metamaterial (HMM) structure featuring a hexagonal array of Ag-nanowires in a porous Al 2O 3 matrix. | Session 79: Nanostructures and Metamaterials |
| 1093 | Manipulating Impurities and Defects During Semiconductor Epitaxy with Light | Alberi, Kirstin | This talk will focus on the use of light as an independent and tunable energy source that can be applied to modify growth processes. | Session 80: Thin Films and Nanostructures |
| 1094 | Investigating Cation Disorder in ZnGeP2 Thin Films Using Resonant Energy X-ray Diffraction | Schnepf, Rekha; Levy-Wendt, Ben; Tellekamp, Marshall; Ortiz, Brenden; Melamed, Celeste; Schelhas, Laura; Stone, Kevin; Toney, Michael; Toberer, Eric; Tamboli, Adele | In this work, we present two methods used to quantify cation disorder in ZnGeP 2 thin films: a stretching parameter calculated from lattice constants, c/a, and an order parameter determined from site occupancies, S. | Session 80: Thin Films and Nanostructures |
| 1095 | Self-trapped exciton assisted energy transfer from the band edge to Mn dopant in Mn2+-doped 2D organometal halide perovskites | Sarang, Som; Delmas, William; Cherrette, Vivien; Naghadeh, Sara; Zhang, Jin | Organo-metal halide perovskites (OMHPs) are relatively new entrants in the arena of doping as a means of tuning semiconductor functionalities, although initial efforts have demonstrated improved quantum yield and broadband emission in Mn-doped OMHPs. | Session 80: Thin Films and Nanostructures |
| 1096 | Sub-10 meV Light Emission from Chemically Controlled Donor-Acceptor Defect Pairs in Solution-Processed 2D Hybrid Perovskites | Sanni, Adedayo; Rury, Aaron | In this presentation we highlight a materials synthesis method that controls light emission below the optical gap from defects in hybrid lead iodide self-assembled quantum wells (SAQWs). | Session 80: Thin Films and Nanostructures |
| 1097 | Semiconductor Quantum Dots: Dopant versus Free Carrier Profiles | Zimmerman, Alexandra; Fedele, Grace; Walrath, Jenna; Greenhill, Christian; Del Gaudio, Davide; Goldman, Rachel | In this work, we are investigating the locations of the extra electrons and their parent donors using a combination of experimental and computational methods, namely local-electrode atom-probe tomography and self-consistent Schrödinger-Poisson simulations based on effective mass theory. | Session 80: Thin Films and Nanostructures |
| 1098 | "Point Defects in Lead Sulfide: A first-principles study" N. Mishra and G. Makov Dept. of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel | Mishra, Neeraj; Makov, Guy | The energetic and electronic properties of point defects in lead sulfide were studied using first-principles methods. | Session 80: Thin Films and Nanostructures |
| 1099 | Exciton–phonon coupling in resonant Raman scattering: intrinsic attributes and extrinsic tunability in ZnTe of different dimensionalities | Yi, Yingyan; Marmon, Jason; Chen, Yuanping; Zhang, Fan; Sheng, Tao; Wijewarnasuriya, Priyalal; Zhang, Haitao; Zhang, Yong | We show that in ZnTe, in contrast to the previous reports, R21 exhibits a much larger intrinsic value and minimal change from bulk to 30 nm nanowire, indicating previously reported size dependences were likely affected by extrinsic mechanisms. | Session 80: Thin Films and Nanostructures |
| 1100 | Emission from localized states in few-layer InSe (Part1: Theory) | Song, Kok Wee; Magorrian, Samuel; Falko, Vladimir | With this model, we find that the scattering processes between different quantized modes due to quantum confinement play a crucial role in forming the hole-acceptor bound pair. | Session 80: Thin Films and Nanostructures |
| 1101 | Emission from localized states in few-layer InSe: Experiment | Lu, Zhengguang; Song, Kok Wee; Shcherbakov, Dmitry; Jiang, Yuxuan; Memaran, Shahriar; Zheng, Wenkai; Watanabe, Kenji; Taniguchi, Takashi; Magorrian, Samuel; Balicas, Luis; Lau, Chun Ning; Falko, Vladimir; Smirnov, Dmitry | We show that the emission from both excitons and localized states can be controlled by varying carrier density, electric or magnetic field. | Session 80: Thin Films and Nanostructures |
| 1102 | Carrier localization in quaternary Ga1-xMnxAs1-yPy ferromagnetic semiconductor films | Riney, Logan; Dong, Sining; Liu, Xinyu; Guo, Lei; Zheng, Ren-Kui; Wang, Jiashu; Li, Xiang; Bac, Seul-Ki; Kossut, Jacek; Dobrowolska, Malgorzata; Furdyna, J; Assaf, Badih | By comparing the total hole concentrations obtained from the number of acceptors and compensating donors to the Hall carrier density, we find that the number of itinerant holes is significantly less that the total hole concentration. | Session 80: Thin Films and Nanostructures |
| 1103 | Surface electronic structure of H/InAs(001)-4×2 studied by synchrotron radiation | Chuang, Chien Wen; Cheng, Yi-Ting; Pi, Tun-Wen; Chainani, Ashish | We report a high-resolution synchrotron radiation (hv = 40 – 160 eV) photoemission study to clarify effects of hydrogenation on the electronic structure of undoped, n-type, and p-type InAs(001). | Session 80: Thin Films and Nanostructures |
| 1104 | Structural and Electronic Properties of 3×1 Si (Ge)-Terminated Diamond (100) Surfaces | Gomez, Hector; Groves, Michael; Neupane, Mahesh; Ruzmetov, Dmitry; Birdwell, A.; Weil, James; Shah, Pankaj; Ivanov, Tony | Motivated by this, we perform a DFT study into clean and oxidized variants of the reconstructed Si (Ge)-terminated diamond (100) surfaces. | Session 80: Thin Films and Nanostructures |
| 1105 | Band Gap Engineering of host GaAs through deposited PbS quantum dots | Bhowmick, Mithun; Singh, Akhilesh; Barik, Puspendu; Xi, Haowen; Ullrich, Bruno | In this talk, we report photoluminescence studies in solvent deposited PbS quantum dots on undoped GaAs substrates. | Session 80: Thin Films and Nanostructures |
| 1106 | How does a glass become a supercooled liquid? Extreme conditions yield new perspectives | Gonzalez-Silveira, Marta; VILA COSTA, ANA; Rodriguez, Marta; Rodriguez-Viejo, Javier | We present here experimental results on the bulk transformation of vapor deposited glasses of different stabilities, showing how the growth of these more mobile regions plays an important role in the softening process in all cases. | Session 81: Molecular Glasses |
| 1107 | On the Allowable or Forbidden Nature of Vapor-Deposited Glasses | Wang, Zhe; 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 81: Molecular Glasses |
| 1108 | Glasses Denser than Supercooled Liquid | Jin, Yi; Zhang, Aixi; Govind, Shivajee; Wolf, Sarah; Moore, Alex; Arabi Shamsabadi, Ahmad; Fakhraai, Zahra | Here, we report that thin vapor-deposited films of N, N’-diphenyl- N, N’-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (TPD) have densities that exceed their corresponding SCL density by as much as 3%. | Session 81: Molecular Glasses |
| 1109 | Multiple glass transitions in Freon 113 vapor-deposited orientational glasses | VILA COSTA, ANA; Ràfols Ribé, Joan; Gonzalez-Silveira, Marta; Lopeandía, Aitor; Tamarit, Josep Lluís; Rodríguez Viejo, Javier | In this work, we study the multiple transitions in Freon 133 (1,1,2-trichlorotrifluorethane) vapor-deposited films grown at deposition temperatures ranging from 50 to 120K, well above and below the glassy crystal to plastic crystal transition temperature (T gr=72K). | Session 81: Molecular Glasses |
| 1110 | Stable polystyrene glasses through PVD and UV radiation | Yin, Junjie; Raegen, Adam; Forrest, James | In this study, we use them as a starting point and extend our capacity to make high molecular weight polystyrene stable glasses. | Session 81: Molecular Glasses |
| 1111 | Specific heat at low temperatures of ultrastable glasses of TPD | Moratalla, Manuel; Rodriguez-Lopez, Marta; Rodriguez-Tinoco, Cristian; Rodriguez-Viejo, Javier; Jimenez-Rioboo, Rafael; Ramos, Miguel | We aim at comparing its behavior at low temperatures to that of its conventional glass and crystalline states. | Session 81: Molecular Glasses |
| 1112 | 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 81: Molecular Glasses |
| 1113 | 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 81: Molecular Glasses |
| 1114 | Improved Mechanical Properties of Organic Stable Glasses by Nanoindentation | Wolf, Sarah; Fulco, Sage; Zhang, Aixi; Jin, Yi; Govind, Shivajee; Zhao, Haoqiang; Walsh, Patrick; Turner, Kevin; Fakhraai, Zahra | Using a temperature gradient for high-throughput acquisition of data, and nanoindentation for investigation of mechanics, we find that accurate determination of these properties requires a careful approach due to surface detection error. | Session 81: Molecular Glasses |
| 1115 | The Role of Intramolecular Relaxation in the Stability, Optical Birefringence, and Structural Anisotropy of Vapor Deposited Glasses | Zhang, Aixi; Zhao, Haoqiang; Wolf, Sarah; Govind, Shivajee; Jin, Yi; Moore, Alex; Riggleman, Robert; Walsh, Patrick; Fakhraai, Zahra | Here, we choose two molecules: α,α-A and α,α-Phen, which differ by a substituent, anthracenyl (A) versus phenanthrenyl (Phen), on the 3,5-di(naphthalen-1-yl)benzene moiety (diarylbenzene). | Session 81: Molecular Glasses |
| 1116 | Influence of isomeric ratio on stable glass forming ability and secondary relaxations in vapor-deposited mixtures of cis/trans-decahydroisoquinoline | Kasting, Benjamin; Tracy, Megan; Gabriel, Jan; Guiseppi-Elie, Anthony; Richert, Ranko; Ediger, Mark | Here, we use in situ AC nanocalorimetry and interdigitated electrode broadband dielectric spectroscopy to explore the effect of varying the ratio of cis/trans isomers in vapor-deposited glasses of decahydroisoquinoline (DHIQ). | Session 81: Molecular Glasses |
| 1117 | Ultrastable Polymer Glass | Raegen, Adam; Yin, Junjie; Zhou, Qi; Forrest, James | We report the preparation and characterization of stable glasses of polymers (polystyrene and poly (methyl methacrylate) prepared by physical vapour deposition. | Session 81: Molecular Glasses |
| 1118 | Anisotropy and Anharmonicity in Polystyrene Stable Glass | Raegen, Adam; Zhou, Qi; Yin, Junjie; Forrest, James | We have used spectroscopic ellipsometry to characterize the anisotropy in stable polymer glasses prepared by physical vapour deposition. | Session 81: Molecular Glasses |
| 1119 | Tuning Spin Current Injection at Ferromagnet-Nonmagnet Interfaces by Molecular Design | Wittmann, Angela; Schweicher, Guillaume; Broch, Katharina; Novak, Jiri; Lami, Vincent; Cornil, David; McNellis, Erik; Zadvorna, Olga; Venkateshvaran, Deepak; Takimiya, Kazuo; Geerts, Yves; Cornil, Jérôme; Vaynzof, Yana; Sinova, Jairo; Watanabe, Shun; Sirringhaus, Henning | Here, we use this technique to systematically study spin injection from a metallic ferromagnet permalloy, Ni 80Fe 20, into dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT), one of the best performing small molecule organic semiconductors to date. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1120 | Intrinsic spin dynamics in MAPbI3 single crystals with low defects | Yao, Yue; Sheffield, Matthew; Hewa Walpitage, Heshan; Brown Heft, Isaac; Liu, Ye; Ni, Zhenyi; Huang, Jinsong; Li, Yan | We measured time-resolved Kerr rotation (TRKR) on these high quality MAPbI3 single crystals, and showed that the spin lifetime improves by an order of magnitude, which suggests the intrinsic origin of this property. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1121 | First Principles Calculation of the Electronic Structure of V(TCNE)2 | Shi, Yueguang; Flatté, Michael | Here we explore the electronic structure using a plane-wave code VASP and XC functional Heyd-Scuseria-Ernzerhof (HSE06). | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1122 | Measuring charge carrier spin relaxation times in a π-conjugated polymer using pulsed electrically detected magnetic resonance in absence of magnetic polarization | Tennahewa, Taniya; Malissa, Hans; Hosseinzadeh, Sanaz; Atwood, Sabastian; Popli, Henna; Lupton, John; Boehme, Christoph | We report measurements of the spin relaxation times T 1 and T 2 of charge carrier spin states in the π-conjugated polymer SY-PPV at room temperature under low static magnetic field conditions (1mT ≤ B 0 ≤ 4mT), in near absence of spin polarization, using a pulsed electrically detected magnetic resonance (pEDMR) scheme, where spin-permutation symmetry dependent charge carrier recombination currents are detected after short, coherent (pulsed) Hahn-echo and inversion recovery pulse trains [1] are applied to organic light emitting diodes (OLED) devices. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1123 | Detection of multiphoton magnetic dipole transitions using spin-dependent charge carrier recombination currents and an amplitude-modulated continuous wave electrically detected magnetic resonance scheme | Atwood, Sabastian; Nahlawi, Adnan; Mkhitaryan, Vagharsh; Hosseinzadeh, Sanaz; Tennahewa, Taniya; Popli, Henna; Malissa, Hans; Lupton, John; Boehme, Christoph | We study nonlinear magnetic resonance phenomena such as the Bloch-Siegert shift and multiphoton magnetic dipole transitions [1] in the high-drive regime using electrically detected magnetic resonance (EDMR) spectroscopy of organic light emitting diodes with conductive polymers as active layers [2]. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1124 | In-Plane Dual-Gated Spin-Valve Device Based on the Zigzag Graphene Nanoribbon | Zhou, Min; Jin, Hao; Xing, Yanxia | Using the nonequilibrium Green’s function combined with density-functional theory, we study the transport properties of the zigzag graphene nanoribbon (ZGNR). | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1125 | First-principles calculation of charge carrier mobility in graphene with absorbed magnetic molecules using complex band structure | Brooks, Andrew; Liu, Shuanglong; Jiang, Tao; Le, Duy; Rahman, Talat; Cheng, Hai-Ping; Zhang, Xiaoguang | Our method determines the constant complex potential that must be added to a perfect crystal to induce the scattering effects seen in a crystal with defects, which we deduce from a series of complex band calculations. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1126 | Reduction of charge noise in shallow GaAs/AlGaAs heterostructures with insulated gates | Liang, Shuang; Nakamura, James; Gardner, Geoff; Manfra, Michael | We observe that GaAs/AlGaAs QPC devices with an Al2O3 dielectric between the metal gates and semiconductor exhibit significantly lower charge noise compared to devices with only Schottky gates and no dielectric. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1127 | Spin drift-diffusion for two-subband quantum wells | de Assis, Ismael; Raimondi, Roberto; Ferreira, Gerson | To this end, the study of the spin diffusion in two-dimensional electron gases (2DEGs) shows that when the Rashba and Dresselhaus spin-orbit couplings (SOC) are balanced, a persistent spin helix regime arises. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1128 | Electro-magnetic and mechanical properties of Ti3C2, and layer substituted mxenes. | Karn, Alok | Employing the pseudo-potential based density functional theory (DFT) with general gradient approximation (GGA), and GGA with coulomb exchange interaction correction (GGA + U), electro-magnetic and mechanical properties are calculated. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1129 | TDDFT for spin waves in two-dimensional systems: orbital-based approximations | Anderson, Matthew; Ullrich, Carsten | Instead, we use orbital-based approximations, most notably the Singwi-Tosi-Land-Sjolander (STLS) approach, generalized to systems with noncollinear spin. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1130 | Evidence of magnon generation in the fractional quantum Hall effect | Wang, Ying; Wan, Zhong; West, Ken; Baldwin, Kirk; Pfeiffer, Loren; Rokhinson, Leonid | In this work, we study spin relaxation at a filling factor 2/3, where the transition between polarized ( p) and unpolarized ( u) states can be controlled by electrostatic gates. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1131 | Raman Spectroscopy and Photoluminescence of Vanadium Tetracyanoethylene | Cheung, Hil; Chilcote, Michael; Cormode, Donley; Yusuf, Huma; Shi, Yueguang; Johnston-Halperin, Ezekiel; Flatté, Michael; Fuchs, Gregory | Here we use confocal microscopy, microfocused Raman spectroscopy, and ferromagnetic resonance to study V[TCNE] x≈2 and its ageing process. | Session 82: Spin in Organic Semiconductors and 2D Systems |
| 1132 | One-dimensional antilocalization of electrons from spin disorder probed by nonlinear Hall effect | Wang, Yang; Wang, Yong; Wang, Tao; Wang, Xinhao; Ou, Yu-Sheng; Ji, Yi; Doty, Matthew; Law, Stephanie; Xiao, John | We propose a phenomenological model and suggest the enhancement of the NLHE below 50 K as evidence for strict one-dimensional antilocalization of electrons from spin disorder [3]. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1133 | Spin-orbit torques generated by low-symmetry ZrTe3 | Cham, Thow Min Jerald; Gupta, Vishakha; Vareskic, Bozo; Jain, Rakshit; BOSE, ARNAB; Ralph, Daniel | We report measurements of spin-orbit torques generated by ZrTe 3 and other low symmetry materials to understand the existence and strength of the out-of-plane anti-damping spin-orbit torques. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1134 | Charge-to-Spin Interconversion in Low-Symmetry Topological Materials | Vila Tusell, Marc; Hsu, Chuang-Han; Garcia, Jose; Benítez, L. Antonio; Waintal, Xavier; Valenzuela, Sergio; Pereira, Vitor; Roche, Stephan | We theoretically show that the reduced symmetry of strong spin-orbit coupling materials such as MoTe 2 or WTe 2 enables a new form of oblique spin Hall effect (SHE), characterized by large and robust in-plane spin polarizations. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1135 | Electric field control of spin-orbit torque switching in a spin-orbit ferromagnet single layer | Jiang, Miao; Asahara, Hirokatsu; Ohya, Shinobu; Tanaka, Masaaki | Here, we report a successful control of a full SOT switching via an external electric field in a single-crystalline ferromagnetic semiconductor (Ga,Mn)As with strong spin-orbit coupling 1,2. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1136 | Nonlinear spintronics with inversion symmetry breaking | He, Pan | Here, we explore the emerging nonlinear spintronic phenomena in the inversion-asymmetric nonmagnetic materials with SOC. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1137 | A quantum theory of the nonlinear Hall effect | Du, Zongzheng; Wang, Chunming; Sun, Hai-Peng; Lu, Haizhou; Xie, X. C. | We present both qualitative and quantitative differences between the quantum theory and the semiclassical theories. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1138 | Probing charge-to-spin and spin-to-charge transduction in heterostructures of 2D van der Waals magnets | Gupta, Vishakha; Cham, Thow Min Jerald; Vareskic, Bozo; Ralph, Daniel | In this work, we probe the charge-to-spin conversion in heterostructures of 2D magnetic insulators with heavy metals. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1139 | Optical readout of spin-orbit torque acting on magnetic thin films | Luo, Yunqiu (Kelly); Gupta, Vishakha; Karimeddiny, Saba; Cham, Thow Min Jerald; Mak, Kin Fai; Shan, Jie; Ralph, Daniel | In this talk, I will discuss recent progress in using magneto-optic Kerr effect (MOKE) microscopy technique to probe SOT manipulation of both conventional metallic ferromagnets and van der Waals magnets. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1140 | Spin and charge interconversion probed via spin torque ferromagnetic resonance and spin pumping in the archetypal Dirac semimetal Cd3As2 | Yanez, Wilson; Ou, Yongxi; Xiao, Run; Held, Jacob; Koo, Jahyun; Pillsbury, Timothy; Rable, Jeffrey; Xiao, Di; Gonzalez, Enrique; Richardella, Anthony; Mkhoyan, K.; Yan, Binghai; Samarth, Nitin | We report spin-to-charge and charge-to-spin conversion at room temperature in heterostructures of the archetypal Dirac semimetal Cd 3As 2 and Ni 80Fe 20, detected by both spin torque ferromagnetic resonance and ferromagnetic driven spin pumping. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1141 | Ultrafast reorientation of the Néel vector in antiferromagnetic Dirac semimetals | Ono, Atsushi; Ishihara, Sumio | We propose a theoretical framework for the ultrafast dynamics in AFM Dirac semimetals, taking not only localized magnetic moments but also itinerant electrons into account. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1142 | Spin-orbit torque switching in sputtered BiTe driven by spin Hall effect | Chen, Tian-Yue; Peng, Cheng-Wei; Liao, Wei-Bang; Tsai, Tsung-Yu; Yen, Hung-Wei; Pai, Chi-Feng | In this work, we use conventional magnetron sputtering to deposit the non-epitaxial BiTe/ferromagnet heterostructures. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1143 | Spin-phonon relaxation of Silicene and Germanene from first-principles density-matrix dynamics | Takenaka, Hiroyuki; Xu, Junqing; Sundararaman, Ravishankar; Ping, Yuan | Here, we investigate spin relaxation of silicene and germanene with ab-initio density matrix dynamics with SOC and electron-phonon couplings. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1144 | Layer- and Gate-tunable Spin-Orbit Coupling in a 2D semiconductor probed by Shubnikov-de Haas Oscillations. | Shcherbakov, Dmitry; Stepanov, Petr; Memaran, Shahriar; Wang, Yaxian; Xin, Yan; Yang, Jiawei; Wei, Kaya; Baumbach, Ryan; Zheng, Wenkai; Watanabe, Kenji; Taniguchi, Takashi; Bockrath, Marc; Smirnov, Dmitry; Siegrist, Theo; Windl, Wolfgang; Balicas, Luis; Lau, Chun Ning | We utilize tunability of ultrathin field-effect transistors combined with high mobility of indium selenide (InSe) to demonstrate SOC and to vary it over an unprecendently wide range by breaking the inversion symmetry with out-of-plane electric field. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1145 | Spin Nernst effect in a topological insulator Bi2Se3 | Jain, Rakshit; BOSE, ARNAB; Richardella, Anthony; Pillsbury, Timothy; Ou, Yongxi; Samarth, Nitin; Buhrman, Robert; Ralph, Daniel | We study bilayers made from thin films of the topological insulator Bi 2Se 3 with CoFeB, apply a thermal gradient using an adjacent heater, and measure voltage signals arising from spin currents via the inverse spin Hall effect. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1146 | Spin textures in a silver sulfide proustite | Koyama, Sean; Rondinelli, James | In this talk, I will present a first-principles electronic structure study of proustite, a polar Ag 3AsS 3 sulfide, and related A 3BQ 3 chalcogenides. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1147 | Observation a Chiral Electronic Continuum in the Giant Rashba Spin-Split System, BiTeI | Lee, Alexander; Peng, Bo; Du, Kai; Kung, Hsiang-Hsi; Monserrat, Bartomeu; Cheong, Sang-Wook; Blumberg, Girsh | In our study, we used polarization-resolved Raman scattering to probe the Rashba continuum. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1148 | First-principles study on Giant Hidden Rashba Effects in novel Two-Dimensional Si2Bi2 | Lee, Seungjun; Kwon, Young-Kyun | Here, through first-principles density functional theory and model Hamiltonian calculations, we investigate giant spin-layer locking observed in novel two-dimensional materials Si 2Bi 2. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1149 | Non-orthogonal spin-momentum locking in strongly spin-orbit coupled materials | Chiu, Wei-Chi; Hakioglu, Tugrul; Markiewicz, Robert; Singh, Bahadur; Bansil, Arun | [1] Here, we discuss the non-magnetic impurity scattering as a candidate mechanism to this isotropic NOSML state. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1150 | Nonequilibrium Noise Measurement of a spin current induced by the spin Seebeck effect | Zhao, Xuanhan; Chen, Liyang; Natelson, Douglas; Liu, Changjiang; Hong, Deshun; Bhattacharya, Anand | Nonequilibrium Noise Measurement of a spin current induced by the spin Seebeck effect | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1151 | Design principles for selecting interfaces between Rashba compound and a ferroelectric film that would reverse spin texture | Zhang, Xiaoli; Mera Acosta, Carlos; Zunger, Alex | We find the minimal design principles leading to R spin texture reversal through ferroelectric switching. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1152 | Inverse design of co-functionaity: Discovery of Rashba materials that are also topological insulators and Rashba materials that are also ferroelectrics | Mera Acosta, Carlos; Fazzio, Adalberto; Dalpian, Gustavo; Zunger, Alex | We demonstrate design of two types of cross fuctionalities involving co existence of the Rashba effect with “effect X”=either topology or ferroelectricity. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1153 | Magnetic Hamiltonian Engineering by Light-Matter Interaction | Lin, Zexun; Rodriguez-vega, Martin; Fiete, Gregory | In this work, we explore the flexibility and magnitude of Hamiltonian engineering by photon-phonon coupling. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1154 | Spin texture and Berry phase of heavy-mass holes confined in SiGe two-dimensional quantum well system under the coexistence of Rashba and Dresselhaus spin-orbit interactions | Tojo, Tatsuki; Takeda, Kyozaburo | We extend DKK’s k.p perturbation approach by take into account the R- and D-relating SOIs up to the 2nd-order terms crossing with k.p term, and computationally explore ST and BP. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1155 | Orbital Magnetoelectric effect in px-py Zigzag nanoribbon. | Cysne, Tarik; Canonico, Luis; Guimarães, Filipe; Muniz, Roberto; Rappoport, Tatiana | Motivated by the recent synthetization of the monolayer of bismuthene on SiC substrate, which can be effectively described by a simple two orbitals model with strong atomic spin-orbit coupling, we study the spin and orbital angular momentum response in px-py zigzag nanoribbon to an applied longitudinal electric field. | Session 83: Spin-Orbitronics in Semiconductor, Topological, and 2D Materials |
| 1156 | Bi-reflection of spin waves by magnon-phonon hybridization | Hioki, Tomosato; Hashimoto, Yusuke; Saitoh, Eiji | In this talk, we report the result of time-resolved magneto-optical microscopy of the reflection dynamics of the hybridized waves. | Session 84: Magnon Spin Current and Transport |
| 1157 | Unitary magnon-mediated operations for quantum computing | Trevillian, Cody; Tyberkevych, Vasyl | Here, we show that dynamic tuning of magnon frequencies at timescales comparable to the magnon-photon energy exchange time allows one to achieve qualitatively new functionalities of such hybrid devices. | Session 84: Magnon Spin Current and Transport |
| 1158 | Magnon supercurrent transport and interference effects | Hillebrands, Burkard | In our experiments, we have found a fingerprint of the supercurrent efflux of condensed magnons subjected to a phase gradient imposed by a local heating of the magnetic sample. | Session 84: Magnon Spin Current and Transport |
| 1159 | A simple model for the description of Bose-Einstein condensation of magnons at room temperature | Artemchuk, Petro; Slavin, Andrei; Tyberkevych, Vasyl | We developed such an approximate model, and demonstrated that mBEC can be described as a gas of weakly-interacting bosonic quasi-particles with anisotropic effective mass in an infinite potential well formed by the ferromagnetic film. | Session 84: Magnon Spin Current and Transport |
| 1160 | Diffusive Magnon Spin Nernst Effect in Antiferromagnets | Zhang, Hantao; Cheng, Ran | To properly accommodate these complexities, we formulate a diffusive theory of the SNE of antiferromagnetic magnons under a realistic device geometry. | Session 84: Magnon Spin Current and Transport |
| 1161 | Spin transport in an electrically driven magnon gas near Bose-Einstein condensation: Hartree-Fock-Keldysh theory | Takei, So | The Keldysh path integral formalism is used to model the magnon gas driven into a nonequilibrium steady state by mismatched bath temperatures and/or electrical injection, and we analyze the magnon system in the normal state, but close to the instability to Bose-Einstein condensation, within the self-consistent Hartree-Fock approximation. | Session 84: Magnon Spin Current and Transport |
| 1162 | Anisotropic magnon spin diffusion length in ultra-thin spinel ferrite thin films | Li, Ruofan; Li, Peng; Yi, Di; Suzuki, Yuri; Ralph, Daniel; nan, tianxiang | 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 a thickness of 6 nm. | Session 84: Magnon Spin Current and Transport |
| 1163 | Unconventional Singularity in Anti-Parity-Time Symmetric Cavity Magnonics | Yang, Ying; Wang, Yi-Pu; Rao, J. W.; Gui, Y. S.; Yao, B. M.; Lu, W.; Hu, Can-Ming | By engineering an anti-parity-time (anti-PT) symmetric cavity magnonics system with precise eigenspace controllability, we observe two different singularities in the same system. | Session 84: Magnon Spin Current and Transport |
| 1164 | Magnon-driven chiral charge and spin pumping and electron-magnon scattering from time-dependent quantum transport combined with classical atomistic spin dynamics | Suresh, Abhin; BAJPAI, UTKARSH; Nikolic, Branislav | In this study, we employ recently developed [M. D. Petrovic et. | Session 84: Magnon Spin Current and Transport |
| 1165 | Mesoscopic Material Properties from Magnon Scattering in Thin Films | Esterlis, Ilya; Fechisin, Christopher; Zhou, Tony; Sels, Dries; Fernandez, Daniel; Demler, Eugene; Yacoby, Amir | Toward this end, we study the scattering of spin waves in magnetic thin films for application to our tabletop magnon scattering platform ( 1). | Session 84: Magnon Spin Current and Transport |
| 1166 | Intrinsic Magnon Nernst Effect in Pyrochlore Iridate Thin Films | Ma, Bowen; Fiete, Gregory | We theoretically study the intrinsic magnon Nernst effect in pyrochlore iridate trilayer thin films grown along the [111] direction using a strong coupling approach. | Session 84: Magnon Spin Current and Transport |
| 1167 | Magnon-Mediated Spin Transport in TmIG/Au/TmIG Valves with Perpendicular Magnetic Anisotropy | Da Silva Vilela, Gilvania; Santos, Eduardo; Abrao, Elias; Rezende, Sergio; Azevedo, Antonio; Moodera, Jagadeesh | In this work, we investigate the spin dynamics and the transport of thermally driven spin currents in valves composed of two layers of TmIG (Tm 3Fe 5O 12) thin films with PMA separated by Au. | Session 84: Magnon Spin Current and Transport |
| 1168 | Birefringence-like spin transport via linearly polarized antiferromagnetic magnons | Han, Jiahao; Zhang, Pengxiang; Bi, Zhen; Fan, Yabin; Safi, Taqiyyah; Xiang, Junxiang; Finley, Joseph; Fu, Liang; Cheng, Ran; Liu, Luqiao | In this work, we experimentally demonstrate that an easy-plane insulating AFM, α-Fe 2O 3 thin film, can conduct efficient spin transmission over micrometer distance. | Session 84: Magnon Spin Current and Transport |
| 1169 | Ferrimagnetic thin film systems for spintronic THz emitters | Albrecht, Manfred | We find that the THz emission amplitude closely follows the in-plane magnetization of the Fe sublattice. | Session 85: Magnetization Dynamics |
| 1170 | Voltage-Controlled Dynamic Modulation of Electromagnetic Response in Antiferromagnetic Materials at Terahertz Frequencies | Xu, Xinyi; Semenov, Yuriy; Kim, Ki | In this study, we theoretically applied such features on the dynamic manipulation of electromagnetic responses with a broad tunable spectral range. | Session 85: Magnetization Dynamics |
| 1171 | Ferromagnetic Resonance in Permalloy film – Platinum/Cobalt Island Hybrid Systems | Rable, Jeffrey; Kempinger, Susan; Huang, Yu-Sheng; Vogel, Michael; Hoffmann, Axel; Schiffer, Peter; Samarth, Nitin | Here, we characterize the dynamics of this hybrid Ising ASI via optically detected ferromagnetic resonance (ODFMR) probed using nitrogen-vacancy (NV) center magnetometry. | Session 85: Magnetization Dynamics |
| 1172 | FMR Modes in Connected Kagome Artificial Spin Ice | Frotanpour, Ali; Woods, Justin; De Long, Lance | We use broad-band ferromagnetic resonance (FMR) and micromagentic simulations to characterize FMR modes in connected, Kagome ASI that is complicated by additional short-range exchange interactions and domain walls within lattice vertices. | Session 85: Magnetization Dynamics |
| 1173 | Coherent Sub-Terahertz Spin Pumping from an Insulating Antiferromagnet | Del Barco, Enrique; Vaidya, Priyanka; Morley, Sophie; Van Tol, Johan; Liu, Yan; Cheng, Ran; Brataas, Arne; Lederman, David | I will present the first evidence of sub-terahertz coherent spin pumping at the interface of a uniaxial insulating antiferromagnet MnF 2 and a platinum thin film, measured by the ISHE voltage signal arising from spin-charge conversion in the platinum layer. | Session 85: Magnetization Dynamics |
| 1174 | Using magnetic tunnel junctions to probe quantum properties of materials | Bales, Calvin; Garcia, Erick; Zhang, Yiou; Xiao, Gang; Mitrovic, Vesna | In this talk, we will present modes in which MTJ based-sensors can be optimized to probe quantum properties of materials. | Session 85: Magnetization Dynamics |
| 1175 | Nanoscale Detection of Magnon Excitations with Variable Wavevectors Through a Quantum Spin Sensor | Lee-Wong, Eric; Xue, Ruolan; Ye, Feiyang; Kreisel, Andreas; Van der Sar, Toeno; Yacoby, Amir; Du, Chunhui | Building on the transformative nitrogen vacancy (NV) based quantum sensing platform, we have achieved local detection of a range of spin wave modes in magnetic insulator Y3Fe5O12 thin films over a 100-nanometer length scale. | Session 85: Magnetization Dynamics |
| 1176 | Probe and Control of Photo-excited Magnetization Precession in Co/Pd Multilayer Films | Smith, Nicholas; Magill, Brenden; Herath Mudiyanselage, Rathsara; Munekata, Hiro; Khodaparast, Giti | In this talk, we present the dynamics of photo-excited precession of magnetization (PEPM) in Co/Pd multilayer films using time resolved magneto-optical Kerr effect (TRMOKE) for different pump fluences. | Session 85: Magnetization Dynamics |
| 1177 | Magnetization and relaxation dynamics of core-shell magnetic nanoparticles over broad temperatures and frequencies | Bui, Thinh; Biacchi, Adam; Correa, Eduardo; Tew, Weston; Hight Walker, Angela; Dennis, Cindi; Woods, Solomon | Here, we present magnetic characterization results for our synthesized doped ferrite core-shell nanoparticles over a range of temperatures (250-330 K), magnetic field amplitudes (0-20 mT RMS), and frequencies (DC-10 MHz) to quantify magnetic anisotropy, relaxation times, and hysteresis. | Session 85: Magnetization Dynamics |
| 1178 | Dynamics in correlated quantum matter with neural networks | Schmitt, Markus; Heyl, Markus | In this talk I will present a versatile and efficient machine learning inspired approach based on a recently introduced artificial neural network encoding of quantum many-body wave functions. | Session 86: Machine Learning for Quantum Matter |
| 1179 | Neural network enhanced hybrid quantum many-body dynamics | Koch, Rouven; Lado, Jose | We demonstrate that combining kernel polynomial techniques [2] and real-time evolution, together with deep neural networks, allows to compute dynamical quantities faithfully. | Session 86: Machine Learning for Quantum Matter |
| 1180 | Autoregressive Neural Network for Simulating Open Quantum Systems via a Probabilistic Formulation | Luo, Di; Chen, Zhuo; Carrasquilla, Juan; Clark, Bryan | We propose an efficient machine learning approach to simulate such dynamics using a probabilistic formulation of quantum mechanics based on the positive operator-valued measure, parameterizing the quantum states with autoregressive neural networks for exact sampling. | Session 86: Machine Learning for Quantum Matter |
| 1181 | Customizable neural-network states for topological phases | Valenti, Agnes; Greplova, Eliska; Lindner, Netanel; Huber, Sebastian | Here, we introduce an interpretable physically motivated variational neural network ansatz based on a tunable extension of the Restricted Boltzmann Machine architecture. | Session 86: Machine Learning for Quantum Matter |
| 1182 | Variational Neural Annealing | Hibat-Allah, Mohamed; Inack, Estelle; Wiersema, Roeland; Melko, Roger; Carrasquilla, Juan | In this talk, we present a combination of the variational principle in classical and quantum physics with recurrent neural networks (RNNs), whose dynamics are naturally devoid of slow Markov chains, to accurately emulate annealing in its classical and quantum formulations, for the purpose of solving optimization problems. | Session 86: Machine Learning for Quantum Matter |
| 1183 | A Neural-Network approach to the simulation of Open Quantum Dynamics using POVMs | Reh, Moritz; Gaerttner, Martin; Schmitt, Markus | Among many other achievements, they present a competetive approach to the solution of the quantum many-body problem, utilizing state of the art network-designs that represent inherent physical properties of the system under scrutiny, e.g. translational symmetry in Convolutional Networks. | Session 86: Machine Learning for Quantum Matter |
| 1184 | Hamiltonian reconstruction as metric for a variational study of the spin-1/2 J1-J2 Heisenberg model | Zhang, Kevin; Lederer, Samuel; Choo, Kenny; Neupert, Titus; Carleo, Giuseppe; Kim, Eun-Ah | We propose using a recently developed Hamiltonian reconstruction method for a multi-faceted approach to evaluating wavefunctions. | Session 86: Machine Learning for Quantum Matter |
| 1185 | Convolutional Neural Network Wave Functions: learning quantum many-body physics | Hendry, Douglas; Feiguin, Adrian | Here, we propose, discuss and benchmark novel strategies to improve and train CNNs as VWF for the frustrated 2D J1-J2 Heisenberg model on the square lattice with focus on the use of real or complex weights, choice of activation functions, the overall architecture, and enforcement of symmetries. | Session 86: Machine Learning for Quantum Matter |
| 1186 | Challenges for simulating quantum spin dynamics in two dimensions by neural network quantum states | Hofmann, Damian; Fabiani, Giammarco; Mentink, Johan; Carleo, Giuseppe; Sentef, Michael | In this work, we employ both t-VMC and deterministic TDVP-based propagation to spin-1/2 Heisenberg systems and take a closer look at various sources of error which can affect the stability and accuracy of the resulting dynamics. | Session 86: Machine Learning for Quantum Matter |
| 1187 | Gauge equivariant neural networks for quantum lattice gauge theories | Luo, Di; Carleo, Giuseppe; Clark, Bryan; Stokes, James | We propose a family of neural-network quantum states with gauge equivariant architecture which exactly satisfy the local Hilbertspace constraints of quantum lattice gauge theories. | Session 86: Machine Learning for Quantum Matter |
| 1188 | Quantum Ground States from Reinforcement Learning | Barr, Ariel; Gispen, Willem; Lamacraft, Austen | Our work provides a novel neural approach to many-body quantum mechanics that leverages optimal control to approximate the Feynman–Kac path measure. | Session 86: Machine Learning for Quantum Matter |
| 1189 | Neural network wave functions and the sign problem | Szabo, Attila; Castelnovo, Claudio | In this talk, I present a neural network architecture with a simple, explicit, and interpretable phase ansatz, which can robustly represent such states and achieve state-of-the-art variational energies for both conventional and frustrated antiferromagnets. | Session 86: Machine Learning for Quantum Matter |
| 1190 | Neural Networks for Analytic Continuation of Response Functions | Verret, Simon; Nourafkan, Reza; Weyrich, Quinton; Desrosiers, Samuel; Tremblay, A.-M. | In this work, we extend the use of deep neural networks to the case of the longitudinal conductivity, in particular the DC conductivity. | Session 86: Machine Learning for Quantum Matter |
| 1191 | Spiking Neuromorphic Chip Encodes Quantum Entanglement Correlations | Czischek, Stefanie; Baumbach, Andreas; Billaudelle, Sebastian; Cramer, Benjamin; Kades, Lukas; Pawlowski, Jan; Schemmel, Johannes; Oberthaler, Markus; Petrovici, Mihai; Gasenzer, Thomas; Gaerttner, Martin | Here we report on the realization of a prototype using the spike-based BrainScaleS hardware developed in the context of European’s Human Brain Project (HBP). | Session 86: Machine Learning for Quantum Matter |
| 1192 | Reinforcement Learning for Many-Body Ground State Preparation based on Counter-Diabatic Driving | Yao, Jiahao; Lin, Lin; Bukov, Marin | We propose a generalized QAOA ansatz called CD-QAOA, which is inspired by the counter-diabatic (CD) driving procedure, designed for quantum many-body systems, and optimized using a reinforcement learning (RL) approach. | Session 86: Machine Learning for Quantum Matter |
| 1193 | Entanglement and Tensor Networks for Supervised Image Classification | Martyn, John; Vidal, Guifre; Roberts, Chase; Leichenauer, Stefan | We revisit the use of tensor networks for supervised image classification, as pioneered by Stoudenmire and Schwab. | Session 86: Machine Learning for Quantum Matter |
| 1194 | Continuous monitoring and feedback control of qubit dynamics using differentiable programming | Schäfer, Frank; Sekatski, Pavel; Koppenhoefer, Martin; Loerch, Niels; Bruder, Christoph; Kloc, Michal | Starting from a distribution of initial states, we aim to find the optimal control scheme to fulfill the control task over a certain time interval. | Session 86: Machine Learning for Quantum Matter |
| 1195 | Machine Learned Predictions of Complex Quantities from Differentiable Networks | Malenfant-Thuot, Olivier; Ryczko, Kevin; Tamblyn, Isaac; Cote, Michel | We are working on a method to optimize the data generation of these structures and the training of models in a single fully machine learned workflow, aiming to reduce the number of data points needed and the biases they carry. | Session 86: Machine Learning for Quantum Matter |
| 1196 | Mitigating sign problem by automatic differentiation | Wan, Zhouquan; Zhang, Shixin; Yao, Hong | Here, we propose a general framework using automatic differentiation (AD) to automatically search for the best continuously-parameterized QMC scheme, which we call “automatic differentiable sign mitigation” (ADSM). | Session 86: Machine Learning for Quantum Matter |
| 1197 | Self-learning projective quantum Monte Carlo simulations guided by restricted Boltzmann machines | Inack, Estelle | In this work, we present a novel method that uses unsupervised machine learning techniques to combine the two steps above. | Session 86: Machine Learning for Quantum Matter |
| 1198 | Improving training schemes for encoding quantum states on neuromorphic hardware | Klassert, Robert; Czischek, Stefanie; Baumbach, Andreas; Gärttner, Martin; Gasenzer, Thomas | Here we aim to improve the training scheme used in this work and explore applications to larger classes of states. | Session 86: Machine Learning for Quantum Matter |
| 1199 | Neural networks for atomistic modelling – are we there yet? | Kucukbenli, Emine | In this talk, we will give an overview of the current state of affairs of the field, in particular for approaches that attempt to bypass the quantum mechanical simulations. | Session 86: Machine Learning for Quantum Matter |
| 1200 | Finding Symmetry Breaking Order Parameters with Euclidean Neural Networks | Smidt, Tess; Geiger, Mario; Miller, Benjamin | We demonstrate that symmetry equivariant neural networks uphold Curie’s principle and can be used to articulate many symmetry-relevant scientific questions into simple optimization problems. | Session 86: Machine Learning for Quantum Matter |
| 1201 | Machine learning dielectric screening for the simulation of excited state properties of molecules and materials | 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 in finite-field (FF) [1]. | Session 86: Machine Learning for Quantum Matter |
| 1202 | Generative Model Learning For Molecular Electronics | Mitchell, Andrew; Rigo, Jonas; Sen, Sudeshna | No single theoretical method can treat the low-temperature physics of such systems exactly. | Session 86: Machine Learning for Quantum Matter |
| 1203 | An assessment of the structural resolution of various fingerprints commonly used in machine learning | Parsaeifard, Behnam; De, Deb; Christensen, Anders; Faber, Felix; Kocer, Emir; De, Sandip; Behler, Jorg; Von Lilienfeld, O.; Goedecker, Stefan A | In this work, we compare the performance of fingerprints based on the Overlap Matrix(OM), the Smooth Overlap of Atomic Positions (SOAP), Behler-Parrinello atom-centered symmetry functions (ACSF), modified Behler-Parrinello symmetry functions (MBSF) used in the ANI-1ccxpotential and the Faber-Christensen-Huang-Lilienfeld (FCHL) fingerprint under various aspects. | Session 86: Machine Learning for Quantum Matter |
| 1204 | Vestigial nematic order in Pd-RTe3 studied using X-ray diffraction TEmperature Clustering (X-TEC) | Mallayya, Krishnanand; Matty, Michael; Straquadine, Joshua; Krogstad, Matthew; Osborn, Raymond; Rosenkranz, Stephan; Fisher, Ian; Kim, Eun-Ah | Here, we use diffuse x-ray scattering to study the effects of Pd-intercalation, which introduces controlled disorder, on CDW formation in ErTe3, a weakly orthorhombic material for which CDW fluctuations are present in both in-plane directions. | Session 86: Machine Learning for Quantum Matter |
| 1205 | Reactive Machine Learning Potential Models for the NO Formation Reaction | Johannesen, Andrew; Goodpaster, Jason | In this work, we produce machine learning potentials for CO 2, O 2, N 2, and NO, with the goal of modeling reactive equilibria between the latter three species. | Session 86: Machine Learning for Quantum Matter |
| 1206 | Achieving Smaller Effective Spot Sizes in nano-ARPES with Machine Learning | Stansbury, Conrad; Lanzara, Alessandra | We demonstrate that convex optimization and machine learning enhanced nano-ARPES allows for resolving the individual contributions of sub-beam domains to the ARPES spectra of discrete domain patterned materials. | Session 86: Machine Learning for Quantum Matter |
| 1207 | INVESTIGATING BAND GAP DIRECTNESS USING MACHINE LEARNING | Ogoshi de Melo, Elton; Popolin Neto, Mário; Mera Acosta, Carlos; M. Nascimento, Gabriel; Rodrigues, João; N. Oliveira Jr., Osvaldo; V. Paulovich, Fernando; M. Dalpian, Gustavo | Using all semiconductors’ band structures from Materials Project, a total of 18,372 materials, we have used classification Machine Learning methods for general prediction of band gap directness and, more importantly, for extraction of interpretable knowledge of direct-indirect transitions. | Session 86: Machine Learning for Quantum Matter |
| 1208 | Unsupervised machine learning of quantum phase transitions using diffusion maps | Lidiak, Alex | Unsupervised machine learning methods are particularly promising in overcoming this challenge. | Session 86: Machine Learning for Quantum Matter |
| 1209 | Learning Algorithms for Control and Characterization of Quantum Matter | Greplova, Eliska; Jin, Guliuxin; Valenti, Agnes; Bucko, Jozef; Romero, Imelda; Schäfer, Frank; Huber, Sebastian | In this presentation, I will discuss how learning algorithms can be used efficiently for this task. | Session 86: Machine Learning for Quantum Matter |
| 1210 | Deep neural networks for quantum state characterization, part 1: classification | Ahmed, Shahnawaz; Muñoz, Carlos Sánchez; Nori, Franco; Frisk Kockum, Anton | We discuss the problem of quantum state characterization in the context of discriminative modelling. | Session 86: Machine Learning for Quantum Matter |
| 1211 | Deep neural networks for quantum state characterization, part 2: reconstruction | Ahmed, Shahnawaz; Muñoz, Carlos Sánchez; Nori, Franco; Frisk Kockum, Anton | Generative models based on deep neural networks attempt to learn an underlying distribution for observed data. | Session 86: Machine Learning for Quantum Matter |
| 1212 | Chebyshev expansion of spectral functions using restricted Boltzmann machines | Chen, Hongwei; Hendry, Douglas; Weinberg, Phillip; Feiguin, Adrian | We hereby present a variational approach based on a Chebyshev expansion of the spectralfunction and a neural network representation for the wave functions. | Session 86: Machine Learning for Quantum Matter |
| 1213 | Correlator Convolutional Neural Networks: An Interpretable Architecture for Image-like Quantum Matter Data | Miles, Cole; Bohrdt, Annabelle; Wu, Ruihan; Chiu, Christie; Xu, Muqing; Ji, Geoffrey; Greiner, Markus; Weinberger, Kilian; Demler, Eugene; Kim, Eun-Ah | Our approach is applicable to arbitrary lattice data, paving the way for new physical insights from machine learning studies of experimental and numerical data. | Session 86: Machine Learning for Quantum Matter |
| 1214 | Variational optimization in the AI era | Clark, Bryan | 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 |
| 1215 | Ab-Initio Solution of the Many-Electron Schrödinger Equation with Deep Neural Networks | Spencer, James; Pfau, David; Botev, Aleksander; G. de G. Matthews, Alexander; Foulkes, W Matthew | We show that deep neural networks can learn the ground state wavefunction of chemical systems given only the positions and charges of the nuclei using variational Monte Carlo[4]. | Session 86: Machine Learning for Quantum Matter |
| 1216 | Fermionic lattice models with first-quantized deep neural-network quantum states | Robledo Moreno, Javier; Stokes, James; Pnevmatikakis, Eftychios; Carleo, Giuseppe | In this talk I will describe first-quantized deep Neural-Network techniques for analyzing strongly coupled fermionic systems on the lattice. | Session 86: Machine Learning for Quantum Matter |
| 1217 | Approaching exact solutions of the electronic Schrödinger equation with deep quantum Monte Carlo | Hermann, Jan; Schätzle, Zeno; Noe, Frank | Here, we present PauliNet, a deep-neural-network architecture that includes the Hartree–Fock solution and exact cusp conditions as a baseline, and uses the Jastrow factor and backflow transformation as entry points for a graph neural network which ensures permutational antisymmetry. | Session 86: Machine Learning for Quantum Matter |
| 1218 | Unitary quantum process tomography by time-delayed measurements | Dietrich, Felix; Lopez Gutierrez, Irene; Mendl, Christian | In this work, we investigate an approach based on the Takens and Ruelle time-delay embedding to learn the Hamiltonian from quantum measurements. | Session 86: Machine Learning for Quantum Matter |
| 1219 | Closed-loop discovery of optimal materials using artificial intelligence | Aykol, Muratahan | In this talk, I will present how closed-loop research systems that build on past data and knowledge, automated experiments/computations and automated decision-making can be designed, tested and deployed to solve certain discovery problems in materials science through iterative, sequential optimization. | Session 86: Machine Learning for Quantum Matter |
| 1220 | Interpretable and unsupervised phase classification based on averaged input features | Arnold, Julian; Schäfer, Frank; Zonda, Martin; Lode, Axel | Here, we present a physically motivated, computationally cheap, unsupervised, and interpretable method to infer phase boundaries from data [1]. | Session 86: Machine Learning for Quantum Matter |
| 1221 | Exploration of Topological Metamaterial Band Structures and Chern numbers using Deep Learning | Peano, Vittorio; Sapper, Florian; Marquardt, Florian | Recently, we have introduced a numerical method for band structure calculations based on deep neural networks (NNs). | Session 86: Machine Learning for Quantum Matter |
| 1222 | Unsupervised learning of topological order | Dagnew, Gebremedhin; Myers, Owen; Herdman, Chris; Haywards, Lauren | In particular, we apply dimensional reduction algorithms such as principal component analysis, clustering algorithms such as k-means, and the internal cluster performance metric known as silhouette analysis directly to raw spin configurations sampled from Monte Carlo simulations. | Session 86: Machine Learning for Quantum Matter |
| 1223 | Machine learning augmented neutron and x-ray scattering for quantum materials | Li, Mingda | In this presentation, I will offer three examples from our works to introduce how ML can augment the spectroscopy analysis, including elastic scattering (momentum-space), inelastic scattering (energy-space) and absorption spectroscopy (intensity-space). | Session 86: Machine Learning for Quantum Matter |
| 1224 | Topological quantum phase transitions retrieved through unsupervised machine learning | Che, Yanming; Gneiting, Clemens; Liu, Tao; Nori, Franco | Here we show with several prototypical and relevant models that topological quantum phase transitions can indeed be automatically retrieved, with unsupervised machine learning, and requiring only a very limited number of hyperparameters. | Session 86: Machine Learning for Quantum Matter |
| 1225 | Machine learning dynamics of phase separation in correlated electron magnets | Zhang, Puhan; Saha, Preetha; Chern, Gia-Wei | Here we show that linear-scaling exchange field computation can be achieved using neural networks trained by datasets from exact calculation on small lattices. | Session 86: Machine Learning for Quantum Matter |
| 1226 | 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 86: Machine Learning for Quantum Matter |
| 1227 | AI-guided engineering of nanoscale topological materials | Srinivasan, Srilok; Cherukara, Mathew; Eckstein, David; Avarca, Anthony; Sankaranarayanan, Subramanian; Darancet, Pierre | As of today, we have identified 224,071 new topological nanoribbons using our framework [6]. | Session 86: Machine Learning for Quantum Matter |
| 1228 | Automatic Learning of Topological Phase Boundaries | Kerr, Alexander; Jose, Geo; Riggert, Colin; Mullen, Kieran | In this article we introduce a heuristic that requires no such tuning. | Session 86: Machine Learning for Quantum Matter |
| 1229 | Multifunctional disordered elastic networks: Designed response of mechanical metamaterials | Liarte, Danilo; Stenull, Olaf; Thornton, Stephen; Sethna, James; Lubensky, Tom | We introduce two periodic lattice models that access negative values of the Poisson ratio, one of which accesses the full range from -1 to +1. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1230 | Programming impulsive deformation with mechanical metamaterials | Liang, Xudong; Crosby, Alfred | Here, we demonstrate that specific internal structural designs can offer the ability to tune quasi-static and high-speed recoil independently to control energy storage and conversion processes. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1231 | Non-Hermitian topological metamaterials with odd elasticity | Zhang, Junyi; Zhou, Di | We establish non-Hermitian topological mechanics in one-dimensional (1D) and 2D lattices consisting of mass points connected by metabeams that lead to odd elasticity. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1232 | Input-independent frequency conversion through transition waves in bistable metabeams | Hwang, Myungwon; Arrieta, Andres | In this study, the input-independence characteristics of bistable lattices are extended to architectures exhibiting dynamics in two different size scales: the microscale excitation in the unit cell level and the macroscale response in the structural level. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1233 | Deformation controlled negative group velocity state in soft composites | Arora, Nitesh; Qi, Yao; Slesarenko, Viacheslav; Li, Jian; Galich, Pavel; Rudykh, Stephan | Here, we reveal the existence of a state in soft composites – layered and 3D fiber composites, characterized by negative group velocity. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1234 | Dynamics of rotationally symmetric elastic quasicrystals: numerical and experimental investigations | Nora Rosa, Matheus; Beli, Danilo; De Marqui, Carlos; Ruzzene, Massimo | In this talk, we investigate a family of continuous elastic quasicrystals with different rotational symmetry orders that are directly enforced through a design procedure in reciprocal space. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1235 | Closed-form existence conditions for band-gap resonances in a 1D linear elastic diatomic lattice with general boundary conditions | Bastawrous, Mary V.; Hussein, Mahmoud I. | In this work, closed-form existence conditions are derived for band-gap resonances in discrete diatomic chains with general boundary conditions and arbitrary chain parity. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1236 | Topological gaps in 2D locally resonant meta-structures via twisting | Guo, Yuning; Rosa, Matheus; Ruzzene, Massimo; Prodan, Emil | Herein, we present a reconfigurable 2D elastic plate featuring arrays of resonators with tunable on-site frequency. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1237 | Mechanical vibration and acoustic bandgaps in lattices and triply periodic bi-continuous composites | Lee, Dong-Wook; Alhammadi, Alya; Almheiri, Mahra; Alzaabi, Fatima; Al Teneiji, Mohammed | In this work, phononic and acoustic bandgaps and phonon dispersion and sound attenuation curves in lattices and triply periodic bi-continuous composites, which are based on the Schwarz’ Primitive and Diamond and Schoen’s I-WP and Gyroid, are found and the widths of these bandgaps are depending on volume fraction and these bandgaps can be controlled by the choice of cell type, size and volume fraction and utilized to control vibration and noise. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1238 | Klein-like tunneling in acoustic metamaterials | Sirota, Lea | Here I present a realization of a completely analogous tunneling effect in a classical, effectively continuous acoustic metamaterial. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1239 | Topological Mechanics and Nonlinearity | Chaunsali, Rajesh; Theocharis, Georgios | In this presentation, we will talk about our recent efforts to understand the interplay of nonlinearity and topology in mechanical systems. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1240 | Mechanical Metamaterials with Strain-Rate Adaptive Energy Absorption | Kang, Sung | We envision our study can contribute to lightweight extreme energy-dissipating materials with applications including personnel protection and automotive and aerospace parts. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1241 | Effective wave transmission at interfaces between metamaterials. | Deshmukh, Kshiteej; Dayal, Kaushik | Our aim is to determine the scattering coefficients that satisfy the conservation of energy flux and find the appropriate jump conditions to be satisfied at the interface. | Session 87: Mechanical Metamaterials III – Vibrations and Nonlinearity |
| 1242 | Multipolar magnetism in d-orbital systems: Crystal field levels, octupolar order, and orbital loop currents | Voleti, Sreekar; Maharaj, Dalini; Gaulin, Bruce; Luke, Graeme; Paramekanti, Arun | Our work highlights the intimate connection between the physics of heavy transition metal oxides and that of f-electron based heavy fermion compounds. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1243 | 4d/5d Row Transition Metal Oxide d-Orbital Systematics 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 various 4 d row and 5 d row TM oxides in order to investigate the systematics of their d-orbital occupancies and the XANES white line features for t 2g and e g symmetry orbitals. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1244 | Diamagnetic d10 and d0 cations direct magnetic interactions in double perovskites | Mustonen, Otto; Pughe, Charlotte; Walker, Helen; Mutch, Heather; Stenning, Gavin; Coomer, Fiona; Cussen, Edmund | Here we formulate simple rules for this d 10/d 0 effect in A 2B’B”O 6 double perovskite oxides. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1245 | Structural and magnetic properties in a planar antiferromagnet | Chen, Xiang; He, Yu; Wu, Shan; Song, Yu; Yuan, Dongsheng; Bourret-Courchesne, Edith; Ruff, Jacob; Islam, Zahir; Frano, Alex; Birgeneau, Robert | Our study presents valuable information for understanding the structural and magnetic properties in this new barium iridium oxides. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1246 | Competing magnetic interactions in Sr3(Ru1-xMnx)2O7 | Nepal, Roshan; Xing, Lingyi; Jin, Rongying | Competing magnetic interactions in Sr3(Ru1-xMnx)2O7 | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1247 | Large spin-driven dielectric response and magnetoelectric coupling in the buckled honeycomb Fe4Nb2O9 | Cao, Huibo; DING, LEI; Lee, Minseong; Choi, Eun Sang; Wu, Yan; Sinclair, Ryan; Chakoumakos, Bryan; Zhou, Haidong | By combining neutron and x-ray single crystal diffraction, we unambiguously determined its magnetic symmetry and studied the structural phase transition. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1248 | Interplay between local and itinerant magnetism in transition metal oxides: the role of anion magnetism | M J, Swamynadhan; Shin, Donghan; O’Hara, Andrew; Ghosh, Saurabh; Pantelides, Sokrates | We examine the local spin density of states, radial dependence of magnetization, and strain sensitivity. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1249 | Multipolar orders in d-orbital systems | Paramekanti, Arun | In this talk, I will discuss our recent theoretical proposal for Ising octupolar order in d-orbital systems, which explains a wide range of experiments in certain 5d transition metal oxides with spin-orbit coupling. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1250 | Neutron scattering study of Na2Co2TeO6 single crystals | Yao, Weiliang; Li, Yuan; Iida, Kazuki; Kamazawa, Kazuya | In this talk, we will present its magnetic excitation spectrum and make the comparison to other honeycomb magnets, in order to assess the prominence of Kitaev physics in this system. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1251 | Probing quantum spin liquids in equilibrium using the inverse spin Hall effect | Aftergood, Joshua; Takei, So | We propose a strongly spin-orbit coupled metal to quantum magnet bilayer as a probe of quantum magnets lacking long range magnetic order, e.g., quantum spin liquids (QSLs), via examination of the voltage noise spectrum in the metal layer. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1252 | Competing energetic states in γ-Fe2WO6 with strong spin-charge-lattice coupling | Sretenovic, Milos; Okamoto, Satoshi; Peiker, Gordon; Tang, Xudong; Zhang, Heda; Xu, CQ; Heitmann, Thomas; Dela Cruz, Clarina; Ke, Xianglin | We report magnetic and electronic properties of γ-Fe 2WO 6 via neutron powder diffraction measurements and first-principles density function theory calculations. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1253 | Structure of the magnetic order induced by Ti-doping in Sr2RuO4 | Zinkl, Bastian; Sigrist, Manfred | We consider a microscopic model for these two bands and explore the formation of magnetic order through doping with non-magnetic impurities. | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1254 | Competition of three-dimensional magnetic phases in Ca$_2$Ru$_{1-x}$Fe$_x$O$_4$: A structural perspective | Chi, Songxue; Ye, Feng; Cao, Gang; Cao, Huibo; Fernandez-Baca, Jaime | Competition of three-dimensional magnetic phases in Ca$_2$Ru$_{1-x}$Fe$_x$O$_4$: A structural perspective | Session 88: Multipolar and Novel Magnetic Orders in Complex Oxides |
| 1255 | Z2 Topology and Edge States of Twisted Bilayer Graphene | Wang, Qiyue; Ma, Chao; Xia, Fengnian; Zhang, Fan | Z2 Topology and Edge States of Twisted Bilayer Graphene | Session 89: Topological Materials: Graphene and Thin films |
| 1256 | Higher Chern Numbers and Quadratic Band Crossing Lines in Bilayer Lieb Lattice | Saxena, Avadh; Banerjee, Saikat | We consider a bilayer Lieb lattice which undergoes an unusual topological transition in the presence of intra-layer spin-orbit coupling (SOC). | Session 89: Topological Materials: Graphene and Thin films |
| 1257 | Non-Hermitian topology and skin effect in Co-graphene nanoribbons | Jiang, Jingwei; Li, Zhenglu; Ruan, Jiawei; Louie, Steven | In this work, we study a particular type of graphene nanoribbon with cobalt adatoms (Co-GNR). | Session 89: Topological Materials: Graphene and Thin films |
| 1258 | Observation of intrinsic time-reversal invariant Z2 topological phase in bilayer graphene | Tiwari, Priya; SRIVASTAV, SAURABH; Ray, Sujay; Das, Tanmoy; Bid, Aveek | In this letter, we report the experimental realization of the time-reversal invariant Z 2 topological phase [Phys. | Session 89: Topological Materials: Graphene and Thin films |
| 1259 | A New Phase of Two-Dimensional Tin on Hexagonal Boron Nitride Monolayer on Metal | Dong, Xi; Zhang, Lizhi; Yoon, Mina; Zhang, Pengpeng | We compare the growth of Sn on a metal substrate with and without the hexagonal boron nitride (hBN) monolayer, which binds weakly to the substrate. | Session 89: Topological Materials: Graphene and Thin films |
| 1260 | Electrical Transport Study in α-Sn Films Grown by Molecular Beam Epitaxy | Ding, Yuanfeng; Yao, Jinshan; Huang, Junwei; Yuan, Ziyuan; Li, Chen; Yuan, Hongtao; Lu, Hong; Chen, Yan-Feng | We have established a phase diagram illustrating the transport behaviors of α-Sn. | Session 89: Topological Materials: Graphene and Thin films |
| 1261 | Measuring non-abelian Berry curvature in strained gallium arsenide using electron-hole collisions | Costello, Joseph; O’Hara, Seamus; Wu, Qile; Pfeiffer, Loren; West, Ken; Sherwin, Mark | Here we present a measurement of this non-abelian Berry curvature in GaAs using HSG. | Session 89: Topological Materials: Graphene and Thin films |
| 1262 | Symmetry, Topology, Exact Many-Body Ground States, and Exact Many-body Excitations in Twisted Bilayer Graphene. | Song, Zhida; Lian, Biao; Xie, Fang; Cowsik, Aditya; Regnault, Nicolas; Bernevig, Andrei | Remarkably, through charge 2 excitations, we prove the absence of Cooper pairs in the project Coulomb Hamiltonian around integer fillings. | Session 89: Topological Materials: Graphene and Thin films |
| 1263 | Magic Manifold and Stable Symmetry Anomaly in Twisted Bilayer Graphene | Song, Zhida; Lian, Biao; Regnault, Nicolas; Bernevig, Andrei | We investigate the single-particle Hamiltonian of Twisted Bilayer Graphene (TBG) model. | Session 89: Topological Materials: Graphene and Thin films |
| 1264 | Two-dimensional Tin on Substrates | Zhang, Lizhi; Dong, Xi; Zhang, Pengpeng; Yoon, Mina | We investigate 2D Sn on substrates and its electronic, magnetic, and quantum topological properties. | Session 89: Topological Materials: Graphene and Thin films |
| 1265 | Topological insulators in the 1T’ phase of MX2 (M=Mo,W; X=S,Se,Te) revisited | Boyal, Prasun; Kumari, Poonam; Mahadevan, Priya | In this work, we study the 1H , 1T and 1T’ phases of the Mo and W based TMD extensively. | Session 89: Topological Materials: Graphene and Thin films |
| 1266 | Effect of Sn Doping on Surface States of Bi2Se3 Thin Films | Stephen, Gregory; Naumov, Ivan; Tyagi, Siddharth; Vail, Owen; DeMell, Jennifer; Dreyer, Michael; Butera, Robert; Hanbicki, Aubrey; Taylor, Patrick; Mayergoyz, Isaak; Dev, Pratibha; Friedman, Adam | In this work, we use substitutional Sn dopants to control the Fermi level in MBE-grown Bi 2Se 3 films. | Session 89: Topological Materials: Graphene and Thin films |
| 1267 | Tunability and thickness dependence of in-plane magnetoresistance and Hall effect in thin films of elemental Bismuth | Ark, Eugene; Hong, Deshun; Bretz-Sullivan, Terence; Liu, Changjiang; Zhang, Steven S.-L.; 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 89: Topological Materials: Graphene and Thin films |
| 1268 | Quantum transport in periodically modulated electron waveguides | Mansfield, Elliott; Damanet, François; Daley, Andrew; Briggeman, Megan; Irvin, Patrick; Levy, Jeremy; Lee, Hyungwoo; Lee, Jungwoo; Eom, Kitae; Eom, Chang-Beom; Li, Jianan; Huang, Mengchen | We present theoretical descriptions of how these features occur. | Session 90: Oxide Two Dimensional Gases |
| 1269 | Conductance of LaAlO3/SrTiO3 Nanostructures at Temperatures Between the Freezing Point and Boiling Point of Water | Greenberg, Aaron; Yang, Dengyu; Shenk, Philip; Albro, Joseph; Eom, Kitae; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | Here we describe experiments in which we measure the properties of conductive nanostructures in the temperature range 273 K < T < 400 K and as a function of ambient pressure. | Session 90: Oxide Two Dimensional Gases |
| 1270 | Persistent Photocarrier Accumulation and Depletion in LaAlO3/SrTiO3 Quantum Wells | Chen, Yu; Lechaux, Yoann; Casals, Blai; Guillet, Bruno; Minj, Albert; Gazquez, Jaume; Mechin, Laurence; Herranz, Gervasi | Here, we present the quantum well at the LaAlO 3/SrTiO 3 interface, where in addition to accumulation, a secondary photoexcitation enables carrier depletion. | Session 90: Oxide Two Dimensional Gases |
| 1271 | Concomitant appearance of conductivity and superconductivity in (111) LaAlO3/SrTiO3 interface with metal capping | Bisht, Ravindra; Mograbi, Michael; Rout, Prasanna; Tuvia, Gal; Yoon, Hyeok; Swartz, Adrian; Hwang, Harold; Dagan, Yoram | We show that this critical thickness always decreases when depositing a metallic over-layer. | Session 90: Oxide Two Dimensional Gases |
| 1272 | Charge-transfer engineering of oxygen vacancies for tailored ionic conductivity at oxide interfaces | Gunkel, Felix; Christensen, Dennis; Chen, Yunzhong; Pryds, Nini | In this contribution, we propose that charge-transfer strategies can also be applied to boost ionic charge carrier concentrations at interfaces by orders of magnitude. | Session 90: Oxide Two Dimensional Gases |
| 1273 | Metal/SrTiO3 two-dimensional electron gases for spin-to-charge conversion | Mallik, Srijani; Moreno, Luis; Cosset-Cheneau, Maxen; Noel, Paul; Vaz, Diogo; Trier, Felix; Sander, Anke; Barthélémy, Agnès; Attane, Jean-Phillippe; Vila, Laurent; Bibes, Manuel | Here we compare the formation and properties of 2DEGs generated in SrTiO 3 by the growth of Al, Ta, and Y ultrathin films by magnetron sputtering. | Session 90: Oxide Two Dimensional Gases |
| 1274 | Electrical gate control of carrier type of the two-dimensional carrier gas at the FeOy/SrTiO3 interface and its field-effect-transistor operation | Wijaya, Theodorus Jonathan; Duc Anh, Le; Kaneta-Takada, Shingo; Tanaka, Masaaki; Ohya, Shinobu | Here, using a back-gate configuration, we demonstrate for the first time a gate control of the carrier type and mobility of the 2D carrier gas at this interface. | Session 90: Oxide Two Dimensional Gases |
| 1275 | Switchable transport properties of a two-dimensional electron gas based on ferroelectric Ca:SrTiO3 | Bréhin, Julien; Trier, Felix; Moreno, Luis; Hemme, Pierre; Noël, Paul; Cosset-Cheneau, Maxen; Attane, Jean-Phillippe; Vila, Laurent; Sander, Anke; Garcia, Vincent; Fusil, Stéphane; Barthélémy, Agnès; Cazayous, Maximilien; Bibes, Manuel | In this talk we show the non-volatile modulation of the transport properties of a 2DEG, using the ferroelectricity of the Ca:SrTiO 3 host material [6,7] . | Session 90: Oxide Two Dimensional Gases |
| 1276 | Creating nano-scale “vias” in LaAlO3/SrTiO3 for integration of nanostructures | Wilson, Carl; Eom, Kitae; Yang, Dengyu; Yu, Muqing; Nethwewala, Aditi; Yoo, Jung-Woo; Eom, Chang-Beom; Ivrin, 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 the interface while also maintaining interfacial conductivity. | Session 90: Oxide Two Dimensional Gases |
| 1277 | Origin of the 2D electron gas at the SrTiO3 surface | Yan, Xi; Wrobel, Friederike; Hong, Hawoong; Sun, Jirong; McChesney, Jessica; Zhou, Hua; Fong, Dillon | Here we employed in situ synchrotron X-ray methods during growth by molecular beam epitaxy (MBE), ARPES, and XPS to study the origin of the 2DEG and its evolution. | Session 90: Oxide Two Dimensional Gases |
| 1278 | Spin-Orbit Coupled 2-Dimensional Electron Gases in SrTaO3 Heterostructures | Gemperline, Patrick; Thapa, Suresh; Provence, Sydney; Comes, Ryan | Spin-Orbit Coupled 2-Dimensional Electron Gases in SrTaO3 Heterostructures | Session 90: Oxide Two Dimensional Gases |
| 1279 | Study of 2DEGs at the interface of Hybrid MBE Grown SrNbO3 on BaSnO3 | Thapa, Suresh; Gamperline, Patrick; Provence, Sydney; Paik, Hanjong; Schlom, Darrell; Comes, Ryan | These studies help to understand the high-quality SNO film growth using hMBE approach and quantify the carrier concentration and mobility in SNO/BSO interface. | Session 90: Oxide Two Dimensional Gases |
| 1280 | Spatially Tunable High-density electron gas at the KTaO3/TbScO3 (001) interface | Lama, Bhubnesh; Eom, Kitae; Lee, Jungwoo; Tsymbal, Evgeny; Eom, Chang-Beom; Paudel, Tula | As a model system for observing such behavior, we studied the (001) interface between polar KTaO 3(KTO) and polar TbScO 3 (TSO) and found a large density (> 1e/uc) two-dimensional electron gas (2DEG) spread across interface in both materials. | Session 90: Oxide Two Dimensional Gases |
| 1281 | Exploring two-dimensional electron (or hole) gas at BaSnO3/LaInO3 interfaces: A first-principles study | Aggoune, Wahib; Draxl, Claudia | We explore the formation of a two-dimensional electron gas (2DEG) at interfaces formed by two wide-gap perovskites of emerging interest, i.e. BaSnO 3 (BSO) and LaInO 3 (LIO), the latter being a polar material. | Session 90: Oxide Two Dimensional Gases |
| 1282 | Quasi-two-dimensional electron and hole gases at the head-to-head and tail-to-tail 180o domain walls in ferroelectric thin films | SIFUNA, JAMES; Garcia-Fernandez, Pablo; Manyali, George; Amolo, George; Junquera, Javier | Some studies have employed (i) substitutional atoms at one or two HH and TT domain walls in superlattices, (ii) altering defect concentration at the tails in thin films. | Session 90: Oxide Two Dimensional Gases |
| 1283 | Point Defect Management in III-Nitrides: A Systematic Approach | Collazo, Ramon; Reddy, Pramod; Washiyama, Shun; Kirste, Ronny; Mita, Seiji; Irving, Douglas; Sitar, Zlatko | Here, we demonstrate a systematic approach to point defect control by employing the defect formation energy as a tool through (a) chemical potential control and (b) Fermi level control. | Session 91: Nitride Semiconductors |
| 1284 | Plasma frequency in doped highly mismatched alloys | Allami, Hassan; Krich, Jacob | We solve our model semi-analytically and show that interband effects of the upper split band bound the plasma frequency to be smaller than an effective band gap. | Session 91: Nitride Semiconductors |
| 1285 | Influence of Surface Treatments on the Structure of GaN Layers | He, Jiaheng; Cheng, GuanJie; Zhang, Zhirong; Chen, Maggie; Frisone, Sam; Zimmerman, Alexandra; Naab, Fabian; Wang, Sizhen; Li, Bingjun; Han, Jung; Goldman, Rachel | To understand processing-structure-property relationships relevant to vertical GaN devices, we examine the influence of dry etching and metal-organic (MO) precursor treatment on the structure and properties of GaN substrates and epitaxial GaN layers. | Session 91: Nitride Semiconductors |
| 1286 | Evidence of new point defects optical features in Zr-implanted polycrystalline AlN films | Aghdaei, Azin; Pandiyan, Rajesh; Ilahi, Bouraoui; Chicoine, Martin; El Gowini, Mohamed; Schiettekatte, François; G. Frechette, Luc; Morris, Denis | In this work, we have investigated the impact of thermal annealing gaseous atmosphere of argon, nitrogen, and forming gas on the structural and optical properties of thin polycrystalline AlN films subjected to high-energy implantation of zirconium ions. | Session 91: Nitride Semiconductors |
| 1287 | Color tunability of light-emitting diodes based on Eu-doped GaN active layers | Austin, Hayley; Ortiz, Kelsey; Mitchell, Brandon; Tatebayashi, Jun; Fujiwara, Yasufumi; Dierolf, Volkmar R | We present a comparison of the predicted and experimentally observed behaviors and discuss extensions of the model and possibilities to extend the color coverages of the single-pixel LED. | Session 91: Nitride Semiconductors |
| 1288 | Alloy-Limited Electron Mobility of AlGaN Evaluated by Unfolding the DFT Band Structure | Pant, Nick; Deng, Zihao; Kioupakis, Emmanouil | We introduce a method to calculate the quantum scattering lifetime, which appears as an energy broadening in the band structure, by unfolding the band structure from the supercell basis to the primitive-cell basis. | Session 91: Nitride Semiconductors |
| 1289 | Semiconducting character of LaN: magnitude of the band gap, and origin of the electrical conductivity | Deng, Zihao; Kioupakis, Emmanouil | We investigate the electronic and defect properties of LaN with hybrid DFT calculations. | Session 91: Nitride Semiconductors |
| 1290 | Defect engineering on demand in GaAsN nanowires by post-growth hydrogen irradiation | Gächter, Nadine; Blundo, Elena; Yukimune, Mitsuki; Zardo, Ilaria; Ishikawa, Fumitaro; Polimeni, Antonio; De Luca, Marta | Here, we report post-growth band-structure engineering in nanowires by mere exposition to low-energy ionized hydrogen gas. | Session 91: Nitride Semiconductors |
| 1291 | Predictions for Yellow Luminescence In Cubic GaN Under Hydrostatic Pressure | Edwards, Arthur; Schultz, Peter; Dobzynski, Richard; Van Ginhoven, Renee; Pineda, Andrew | We report defect studies in cubic GaN using the local moment counter charge technique (LMCC) as a function of pressure, enabling experimental predictions for the behavior of the yellow luminescence. | Session 91: Nitride Semiconductors |
| 1292 | Weak localization in compositionally graded AlxGa1-xN | Shafe, Abdullah; Al-Tawhid, Athby; Bagheri, Pegah; Reddy, Pramod; Mita, Seiji; Moody, Baxter; Collazo, Ramon; Sitar, Zlatko; Ahadi, Kaveh | We report on the observation of weak localization in the compositionally graded Al xGa 1-xN. | Session 91: Nitride Semiconductors |
| 1293 | Doping-limitations of cubic boron nitride: effect of unintentional defects on shallow doping | Joshi, Tamanna; Kumar, Pankaj; Poudyal, Bipul; Russell, Sean; Dev, Pratibha | In this theoretical work, we study the reasons for doping-limitations, an acute issue in realizing cBN-based electronics. | Session 91: Nitride Semiconductors |
| 1294 | Evidence for Vector Chiral Magnetic Order in κ-(BETS)2Mn[N(CN)2]3 | Winter, Stephen; Riedl, Kira; Hartmann, Steffi; Zielke, David; Kushch, Natalia; Gati, Elena; Biberacher, Werner; Valenti, Roser; Lang, Michael; Kartsovnik, Mark; Yagubskii, Eduard | Based on analysis of specific heat, magnetic torque, and NMR measurements combined with ab-initio calculations, we will address: (i) The nature and role of π- d interactions, (ii) the magnetic interactions within the BETS layers including SOC and ring-exchange, (iii) the origin of anomalous angle dependence and therefore (iv) the character of the magnetic ground state at low pressure. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1295 | Realization of the orbital-selective Mott state at the molecular level in Ba3LaRu2O9 | Aczel, Adam; Chen, Qiang; Verrier, Aime; Ziat, Djamel; Clune, Amanda; Rouane, Redha; Bazier-Matte, Xavier; Ma, Jie; Calder, Stuart; Taddei, Keith; Dela Cruz, Clarina; Kolesnikov, Alexander; Cheng, Jinguang; Liu, Z.; Quilliam, Jeffrey; Musfeldt, Janice; Zhou, Haidong | In this work, we use bulk characterization, muon spin relaxation, neutron diffraction, and inelastic neutron scattering to identify a rare intermediate spin-3/2 per dimer state that cannot be understood in a double exchange or quasi-molecular orbital picture and instead arises from orbital-selective Mott insulating behavior at the molecular level. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1296 | Spin-Lattice Coupling in the Spin-1 Kagome Compound Na2Ti3Cl8 | Birol, Turan | In this talk, after giving a brief introduction to the idea of spin-lattice coupling, I am going to discuss a case study from a first principles theory point of view: Na2Ti3Cl8 is a 2 dimensional frustrated antiferromagnet, which hosts spin-1 Ti cations on a Kagome lattice. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1297 | Frustration-driven dimerization in two-leg Heisenberg ladder with trimer rungs | Weichselbaum, Andreas; Yin, Weiguo; Tsvelik, Alexei | We study the zero-temperature phase diagram, where we combine numerical and analytical methods into an overall consistent description. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1298 | Two- and three dimensional quantum-spin-1/2 XXZ magnets in zero magnetic field: global phase diagrams, thermodynamics and entanglement | Sariyer, Ozan | Global phase diagrams and critical properties of the field-free quantum-spin-1/2 XXZ model in two- and three-dimensions are obtained using a numerical renormalization group theory method. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1299 | Pressure-evolution of a symmetry-broken S = ½ dimer magnet | Curley, Sam; Coak, Matthew; Williams, Robert; Ghannadzadeh, Saman; Kamenskyi, Dmytro; Schneider, Andreas; Okubo, Susumo; Sakurai, Takahiro; Ohta, Hitoshi; Huddart, Benjamin; Lancaster, Tom; Graf, David; Tidy, Jere; Senn, Mark; Manson, Jamie; Goddard, Paul | Here we discuss the unusual hydrogen-bond-mediated exchange pathways in this material and the resultant phase diagram. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1300 | Decay of Higgs amplitude mode in quasi two-dimensional antiferromagnet Ba2FeSi2O7 | Do, Seunghwan; Zhang, Hao; Williams, Travis; Hong, Tao; Garlea, Vasile; Jang, Tae-Hwan; Park, Jae-Hoon; Batista, Cristian; Christianson, Andrew | We investigate the emergence of the longitudinal mode in two-dimensional square-lattice antiferromagnet Ba 2FeSi 2O 7 –easy-plane antiferromagnet with effective S=1 near a continuous quantum phase transition into a quantum paramagnet [2,3]. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1301 | 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; René de Cotret, Samuel; 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 92: Low Dimensional Magnets in the Quantum Limit |
| 1302 | Exactly solvable Dimer Liquid and Ising Gauge Theory of a nonplanar Quantum Dimer Model on the Checkerboard Lattice | Wildeboer, Julia; Nussinov, Zohar; Seidel, Alexander | We present analytic results for a special dimer model on the nonbipartite and nonplanar checkerboard lattice that does not allow for parallel dimers surrounding diagonal links. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1303 | Quantum-to-classical correspondence in two-dimensional Heisenberg models | Wang, Tao; Cai, Xiansheng; Chen, Kun; Prokof’ev, Nikolai; Svistunov, Boris | We employ the bold diagrammatic Monte Carlo method to explore the universality of QCC by considering three different two-dimensional spin-1/2 Heisenberg models. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1304 | Quantum Magnetism in the Honeycomb Lattice Material YbCl3 | Christianson, Andy | This talk will focus on the physics of the honeycomb lattice Heisenberg model as probed by inelastic neutron scattering. | Session 92: Low Dimensional Magnets in the Quantum Limit |
| 1305 | Atomically Thin Wafers and Superlattices | Park, Jiwoong | These wafer-scale films and circuits enable novel functionalities previously unavailable; we will discuss two examples including extremely anisotropic thermal conduction for directed heat tranport and delta-waveguides for two dimensional photonics. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1306 | Epitaxial Growth of Monolayer PdTe2 and Patterned PtTe2 by Direct Tellurization of Pd and Pt surfaces | Liu, Lina; Zemlyanov, Dmitry; Chen, Yong | Epitaxial Growth of Monolayer PdTe2 and Patterned PtTe2 by Direct Tellurization of Pd and Pt surfaces | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1307 | Thermoelectric Properties of 2-D B4C Nanosheets | Gupta, Adway; Singh, Arunima | We start by generating the theoretical structures for non-polar and symmetric 2-D slabs of B4C along multiple cleavage directions and all possible terminations. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1308 | Epitaxial growth of black phosphorene enabled on black-phosphorene-like group IV-VI substrates | Muzaffar, M. U.; Wang, Xue-Sen; Zhang, Shunhong; Cui, Ping; Zhang, Zhenyu | Here we use first-principles approaches to identify a highly desirable semiconducting SnSe substrate which is shown to be an ideal candidate for direct growth of BlackP. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1309 | Formation and self-assembly of graphene nanoribbons and nanosheets in metals | Salamanca-Riba, Lourdes; Ge, Xiaoxiao; Morales, Madeline; Klingshirn, Christopher; Rabin, Oded; Wuttig, Manfred; Zhang, Shenjia | We use an electrocharge assisted process (EAP) 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 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1310 | Conquering sealing problems of gaps: hydrogen assisted edge growth of h-BN | Zhao, Wenjing; Zhu, Junyi | In this talk, we illustrate intrinsic difficulty of filling a gap of last few atoms on zigzag edges of hexagonal boron nitride, defined as a sealing problem. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1311 | Exploring the properties of light-assisted nanoscale defect formation in hexagonal boron nitride | Torres-Davila, Fernand; Ding, Yi; Molinari, Michael; Blair, Richard; Tetard, Laurene | Here we show that nanoscale defects can controllably be introduced in the hexagonal boron nitride (h-BN) lattice using the tip of an atomic force microscope (AFM). | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1312 | Thermal properties of few-layer graphene crystallites: role of stacking faults | Mohapatra, Akash; Das, Sarthak; Majumdar, Kausik; Rao, M S Ramachandra; Jaiswal, Manu | In this work we examined thermal properties of few-layer graphene crystallites arranged vertically with stacking disorder. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1313 | Grain rotation and growth in two-dimensional hexagonal materials | Waters, Brendon; Huang, ZhiFeng | We study this dynamic process via Phase Field Crystal modeling for 2D hexagonal materials. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1314 | Quenching Rotational Inhomogeneities In Polycrystalline Graphene | Brantly, Samuel; Ciocys, Samuel; Currier, Kayla; Schmid, Andreas; Lanzara, Alessandra | Here we use low-energy electron microscopy (LEEM) and low-energy electron diffraction (LEED) to characterize the formation of domains of different rotational orders for in-situ grown graphene on various metallic substrates. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1315 | Polymer-Free Transfer of 2D Materials onto III-V Semiconductor Surfaces for Scanning Probe Microscopy and Molecule-Encapsulation Experiments | Buchbinder, Lihy; Mueller, Sara; Gupta, Jay | We present results of encapsulation of deionized water droplets between GaAs (110) and thinned graphite, characterized by atomic force (AFM), scanning electron (SEM) and optical microscopy techniques. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1316 | Enhanced Photocatalytic Activity of Exfoliated WS2 Nanosheets | Dahal, Arjun | Here, we show the production of WS 2 nanosheets increases significantly if layered WS 2 bulk powder is ball-milled before the ultrasonication process. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1317 | Laser-assisted conversion from 1T′- MoTe2 to MoTe2(1-x)S2x ternary alloys | Nugera, Florence; Popescu, Adrian; Woods, Lilia; Gutierrez, Humberto | Subsequently, the as-grown transition metal ditelluride was chemically modified using an in situ laser-assisted method in a reactive gas environment. | Session 93: Synthesis of 2D Materials, Superlattices, and Defects |
| 1318 | 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 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1319 | Non-Local Conductance in Three-Terminal Majorana Nanowires, Part 1 — Deterministic Control over Crossed Andreev Reflection Using Quantum Dots | Wang, Guanzhong; Dvir, Tom; van Loo, Nick; Mazur, Grzegorz; Badawy, Ghada; Gazibegovic, Sasa; Bakkers, Erik; Kouwenhoven, Leo; De Lange, Gijs | We study the non-local conductance of an InSb nanowire coupled to superconducting Al, where the conductance is carried out through a quantum dot. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1320 | Non-local conductance in three-terminal Majorana nanowires part 2 – spin-polarization of the bulk bands | Dvir, Tom; Wang, Guanzhong; van Loo, Nick; Mazur, Grzegorz; Badawy, Ghada; Gazibegovic, Sasa; Bakkers, Erik; Kouwenhoven, Leo; De Lange, Gijs | With the application of small magnetic fields, we observe trivial spin polarization signatures that disappear following the closing of the induced gap. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1321 | Crossed Andreev reflection in an InSb 2DEG in the quantum Hall state | Kulesh, Ivan; Thomas, Candice; Metti, Sara; Guinn, Charles; Kallaher, Raymond; Gardner, Geoffrey; Manfra, Michael; Goswami, Srijit | We embark on a novel approach to engineer a superconducting topological state of matter utilizing integer quantum hall (QH) edge states, coupled via crossed Andreev reflection (CAR) through a thin superconducting strip. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1322 | Proximity induced superconductivity in epitaxial Nb/Au(111) bilayers | Chen, Cliff; Lee, Patrick; Moodera, Jagadeesh; Wei, Peng | In this talk, we present our work in swapping the vanadium layer with niobium (Nb) in order to increase the size of the induced gap. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1323 | Topological Superconductivity in Ferromagnetic Insulator-Superconductor-Semiconductor Heterostructures | Khindanov, Aleksei; Antipov, Andrey; Cole, William; Alicea, Jason; Lee, Patrick | In this work, using Usadel equation we theoretically investigate ferromagnetic insulator-superconductor-semiconductor heterostructures taking into account spin-orbit scattering, spin-flip scattering and Zeeman field in the parent superconductor. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1324 | Topological superconductivity in ferromagnetic hybrid nanowires | Escribano, Samuel D.; Prada, Elsa; Oreg, Yuval; Levy-Yeyati, Alfredo | In this theoretical work we show that the topological regime can arise in these devices provided that certain geometrical and electrostatic conditions are met. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1325 | Single-shot fabrication of semiconducting-superconducting nanowire devices | Borsoi, Francesco; Mazur, Grzegorz; van Loo, Nick; Nowak, Michal; Bourdet, Leo; Li, Kongyi; Korneychuk, Svetlana; Fursina, Alexandra; Memisevic, Elvedin; Badawy, Ghada; Gazibegovic, Sasa; Van Hoogdalem, Kevin; Bakkers, Erik; Kouwenhoven, Leo; Heedt, Sebastian; Quintero-Peréz, Marina | Here, we exploit a fabrication platform based on shadow walls that enables the in-situ, selective and consecutive depositions of superconductors and normal metals to form normal-superconducting junctions. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1326 | Enhanced Majorana bound states in magnetic chains on superconducting topological insulator edges | Dias Da Silva, Luis; Teixeira, Raphael; Kuzmanovski, Dushko; Black-Schaffer, Annica | In this contribution, we propose that a magnetic chain deposited on a QSHI edge in contact with a superconducting surface, offers a better choice of tunability and MBS robustness compared to the same magnetic chain deposited on the QSHI bulk or a superconduting surface. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1327 | Polarized Majorana fermions in double Kitaev zigzag honeycomb nanoribbons | Ribeiro, Renan; Correa, Jorge; Ricco, Luciano; Seridonio, Antonio; Figueira, Marcos | In this work, we study Majorana fermions’ formation at the ends of a finite double spin-Kitaev zigzag honeycomb nanoribbon (KZHNR). | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1328 | Majorana Zero Modes in Magnetic Texture Vortices | Kotetes, Panagiotis; Steffensen, Daniel; Andersen, Brian | We propose a novel route to engineer Majorana zero modes (MZMs), which relies on inducing shift or spin vortex defects in magnetic textures which microscopically coexist or are in proximity to a superconductor. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1329 | Self consistent order parameter calculations in superconductor-nanowire hybrid systems | Dutta, Atri; Sriram, Praveen; Muralidharan, Bhaskaran | In this study, we employ the Keldsyh nonequilibrium Green’s function (NEGF) formalism [1] coupled self consistently with order parameter calculations [2], in order to elucidate the subtleties involved in the issue of current conservation in the N (normal metal)-S (topological superconductor)-N (normal) link. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1330 | Electronic properties of InAs/Al/EuS hybrid nanowires: Effective Zeeman spin splitting and topological phase diagram | Liu, Chun-Xiao; Liu, Yu; Schuwalow, Sergej; Krogstrup, Peter; Wimmer, Michael | Motivated by recent experiments on InAs/Al/EuS heterostructures, we theoretically study the electronic properties of semiconductor-superconductor-ferromagnetic insulator hybrid nanowires. | Session 94: Topological Superconductivity: Quantum Wires and 2DEG |
| 1331 | Discovery of topological magnetic Weyl loops by spectroscopy and transport | Belopolski, Ilya; Chang, Guoqing; Cochran, Tyler; Yang, Xian; Cheng, Zijia; Yin, Jiaxin; Hasan, Zahid | In this talk, I’ll introduce a new animal in this zoo: the magnetic Weyl loop [1,2]. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1332 | 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 95: Topological Materials: Lines, Loops and Beyond |
| 1333 | Complex Dirac-like Electronic Structure in Atomic Site Ordered Rh3In3.4Ge3.6 | Flessa Savvidou, Aikaterini; Clark, Judith; Wang, Hua; Wei, Kaya; Choi, Eun Sang; Mozaffari, Shirin; Qian, Xiaofeng; Shatruk, Michael; Balicas, Luis | We report the synthesis via an indium flux method of a novel single-crystalline compound Rh 3In 3.4Ge 3.6 that belongs to the cubic Ir 3Ge 7 structure type. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1334 | Magnus Hall effect | Papaj, Michal; Fu, Liang | We show that in the ballistic limit the Magnus Hall conductance measures the distribution of the Berry curvature on the Fermi surface. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1335 | Topological phonons in oxide perovskites controlled by light | Peng, Bo; Hu, Yuchen; Murakami, Shuichi; Zhang, Tiantian; Monserrat, Bartomeu | Overall, we propose oxide perovskites as a versatile platform in which to study topological phonons and their manipulation with light [1]. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1336 | Fractional Corner Charge of Sodium Chloride | Po, Hoi Chun; Watanabe, Haruki | Fractional Corner Charge of Sodium Chloride | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1337 | LaN Structural and Topological Phase Transitions Driven by Pressure and Temperature | Chen, Wei-Chih; Lin, Chia-Min; Maciejko, Joseph; Chen, Cheng-Chien | In this study, we examine the stabilities of all rock-salt structured LaX, and show that LaN exhibits soft or negative phonon modes, and is thereby dynamically unstable. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1338 | Anisotropic optical response in quasi-one-dimensional topological insulators Bi4Br4 and Bi4I4 | Talkington, Spenser; Zhang, Fan | By using tight-binding models derived from first-principles calculations, we provide quantitative predictions for the optical properties. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1339 | Epitaxial HfTe2, ZrTe2 and type-III Dirac fermions in HfxZrx-1Te2 topological semimetal candidate | Fragkos, Sotirios; Tsipas, Polychronis; Tsoutsou, Dimitra; Xenogiannopoulou, Evangelia; Sant, Roberto; Alvarez, Carlos; Renaud, Gilles; Okuno, Hanako; Panayiotatos, Yerassimos; Dimoulas, Athanasios | We theoretically predict that 1T-HfTe 2 and 1T-ZrTe 2 transition metal dichalcogenides are type-I and type-II Dirac semimetals, respectively. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1340 | Filling-enforced Dirac nodal loops in the non-magnetic systems and their evolutions under various perturbations | Shao, Dexi; Fang, Chen | Based on symmetry analysis, we propose that filling-enforced Dirac nodal loops (FEDLs) in non-magnetic systems exist and only exist in only five space groups (SGs), namely, SG.57, SG.60, SG.61, SG.62 and SG.205. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1341 | High-harmonic generation in Dirac metals: Application of the semiconductor-Bloch formalism to topological systems | Crewse, Jack; Groessing, Patrick; Wilhem, Jan; Evers, Ferdinand | Here we investigate these topological effects via a simulation of the semiconductor-Bloch equations. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1342 | Corner charge and bulk multipole moment in periodic systems | Watanabe, Haruki; Ono, Seishiro | In this talk, we discuss a formula for the boundary charges in terms of the bulk quadrupole moment of the insulator. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1343 | Synthesis and Characterization of the Kagome metal LuMn6Sn6 | Xue, Rui; Musicó, Brianna; Kinsler-Fedon, Candice; Huang, Nan; Matsuoka, Takahiro; Mandrus, David | Here we report the crystal growth, magnetization, and electrical transport properties of a related compound, LuMn 6Sn 6. | Session 95: Topological Materials: Lines, Loops and Beyond |
| 1344 | Spin-Orbit-Torque Exchange Resonance in Magnetic Topological Insulators | Tang, Junyu; Cheng, Ran | We formulate the adiabatic spin-orbit torque (SOT) arising from the topological electrons in MTI as well as its reciprocal effect — topological charge pumping. | Session 96: Spin Pumping and Spin Resonance |
| 1345 | Coherent spin current amplification by a non-adiabatic interaction. | Assouline, Benjamin; Brik, Marina; Bernstein, Nirel; Capua, Amir | We propose a mechanism for coherent spin current amplification in a solid-state magnetic medium device. | Session 96: Spin Pumping and Spin Resonance |
| 1346 | Improvement in Spin-Torque Ferromagnetic Resonance Using Frequency Modulation | Karimeddiny, Saba; Ralph, Daniel | We show, using a Pt(6 nm)/Py sample series, that the AM causes changes to the resonant lineshape that are not captured by the conventional theoretical models of ST-FMR. | Session 96: Spin Pumping and Spin Resonance |
| 1347 | A Ferromagnetic Resonance Study of Magnetic Properties in Magnetron Sputtered NixFe100-x Thin Films and Multilayers for Shielding Applications. | McMaster, Matthew; Hendren, William; Scott, Jade; Bowman, Robert | We present a systematic study of the effect of process conditions and stoichiometry on the ferromagnetic resonance (FMR) and spin wave properties [1][2] of Ni xFe 100-x alloy thin films fabricated by magnetron sputtering. | Session 96: Spin Pumping and Spin Resonance |
| 1348 | Magnetization-Independent Spin Hall Effect in Ferromagnetic Trilayers | Mittelstaedt, Joseph; Buhrman, Robert; Ralph, Daniel | We observe signals with the symmetry of a magnetization-independent spin Hall effect with spin-to-charge efficiencies as large as 10% in NiFe, which is comparable to heavy metal-ferromagnet bilayers. | Session 96: Spin Pumping and Spin Resonance |
| 1349 | Detection of above-NV-frequency ferromagnetic dynamics | McCullian, Brendan; Thabt, Ahmed; Gray, Benjamin; Melendez, Alex; Wolf, Michael; Safonov, Vladimir; Pelekhov, Denis; Bhallamudi, Vidya; Page, Michael; Hammel, P Chris | Here, we use microwaves to drive a low damping ferrite thin film and simultaneously detect conventional microwave absorption and NV fluorescence signals. | Session 96: Spin Pumping and Spin Resonance |
| 1350 | Influence of Structural Disorder on Magnetic Relaxation in Fe Thin Films | Wu, Shuang; Smith, David; Rai, Anish; Clavel, Michael; Hudait, Mantu; Mewes, Tim; Emori, Satoru | In this work, we examine magnetic relaxation in polycrystalline and amorphous Fe films grown on different seed layers. | Session 96: Spin Pumping and Spin Resonance |
| 1351 | Nonlocal Uniform-Mode Ferromagnetic Resonance Spin Pumping | Cheng, Yang; Lee, Aidan; Wu, Guanzhong; Pelekhov, Denis; Hammel, P Chris; Yang, Fengyuan | Here, we report a new nonlocal spin injection scheme using uniform-mode ferromagnetic resonance (FMR) spin pumping in Pt/ Y3Fe5O12 (YIG) lateral structures. | Session 96: Spin Pumping and Spin Resonance |
| 1352 | Superconductivity-enhanced spin pumping: The role of Andreev resonances | Tanhayi Ahari, Mostafa; Tserkovnyak, Yaroslav | We describe a simple hybrid superconductor/ferromagnetic-insulator structure manifesting spin-resolved Andreev bound states in which dynamic magnetization is employed to probe spin related physics. | Session 96: Spin Pumping and Spin Resonance |
| 1353 | Determination of the spin Hall angle by the inverse spin Hall effect and the spin torque ferromagnetic resonance: comparison of methods | Ben-Shalom, Ranen | In this work we measure the SHA from DC bias current dependent inverse spin Hall effect (ISHE) measurements which is more immune to the injected DC current noise and to the artefacts related the optimization problem. | Session 96: Spin Pumping and Spin Resonance |
| 1354 | Spin pumping in YIG/s-wave superconductor hybrids | Carreira, Santiago; Sanchez-Manzano, David; Rouco, Victor; Sander, Anke; Collin, Sophie; Carretero, Cecile; Santamaria, Jacobo; Anane, Adbelmadjid; Villegas, Javier | The study of the magnetization dynamics of the F is thus a useful approach to investigate the spin diffusion in the SC [2]. | Session 96: Spin Pumping and Spin Resonance |
| 1355 | Theoretical prediction and discovery of antiferromagnetic topological insulators | Otrokov, Mikhail | The discovery of the first AFMTI MnBi 2Te 4 opens a new field that focuses on intrinsically magnetic stoichiometric compounds: several MnBi 2Te 4-derived MTIs were synthesized right away [5], that will be discussed in the talk along with other AFMTI candidates predicted. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1356 | Exploration of topological states in magnetic topological insulator MnBi2Te4 and transition metal dichalcogenide superconductor WS2 | Li, Wei | Based on our results, we propose a novel layered surface structure of MnBi 2Te 4, which can explain the current controversies in experimental results. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1357 | Interplay of magnetism, superconductivity, and topology in the rare-earth diantimonides | Bannies, Jörn; Oudah, Mohamed; Bonn, Douglas; Burke, Sarah; Aronson, Meigan | Here, we analyze the interplay between these features in different members of this material class. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1358 | Defect Genome of 2d Topological Insulators for High Temperature Quantum Anomalous Hall Effect | Pham, Anh; Ganesh, Panchapakesan | We apply the linear-response method [6] to obtain the self-consistent Hubbard ‘U’ to predict the topology and gaps. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1359 | Modeling topological edge magnetoplasmons in a quantum anomalous Hall insulator | Wang, Taige; Cauchon, Alex; Alfaro, Julien; Allen, Monica | In this work, we develop a theoretical framework that models the microwave response of quantum anomalous Hall (QAH) insulators using a full conductivity tensor description. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1360 | Transport Properties of Fe-doped type-II Weyl semimetal WTe2 | Basnet, Rabindra; Pandey, Krishna; Acharya, Gokul; Nabi, Md Rafique Un; Wegner, Aaron; Hu, Jin | Here, we report the tuning of electronic properties of type-II Weyl semimetal WTe 2 by Fe doping. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1361 | Material and Spin Transport Characterization in Gd-alloyed Bismuth Selenide | Sahu, Protyush; Peterson, Thomas; Fan, Yihong; Chen, Junyang; Devaux, Xavier; Jaffres, Henri; Migot, Sylvie; Dang, Huong; George, Jean-Marie; LU, Yuan; Wang, Jianping | We developed a homogenous amorphous material, Gd (40%)-alloyed Bi xSe 1-x (60%), which shows a resistivity of 60 mOhm.cm. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1362 | Topological Properties of SnSe/EuS and SnTe/CaTe Interfaces | Yang, Shuyang; Wu, Chunzhi; Marom, Noa | We consider both interface slab models with a vacuum region and periodic heterostructures without vacuum. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1363 | Extremely linear magnetoresistance in strained WTe2 | Tran, Jason; Li, Junxue; Aytan, Ece; Shtengel, Kirill; Balandin, Alexander; Shi, Jing; Wei, Peng | In this talk, we present our studies of strained T d-WTe 2 grown by molecular beam epitaxy (MBE). | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1364 | Six-fold degenerate fermions in PdSb2 | Chapai, Ramakanta; Graf, David; Jin, Rongying | By measuring the magnetic field ( H) dependence of the magnetic torque τ( H) in single crystalline PdSb 2, we observe the de Haas-van Alphen (dHvA) oscillations. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1365 | Tuning the symmetry and electronic and topological properties of two-dimensional transition metal dichalcogenides by alloying | Luo, Wei; Geohegan, David; Yoon, Mina | Using first principles calculations in combination with combined with evolutionary algorithms, we identify stable and metastable configurations of a two-dimensional alloy of WS 2xTe 2(1-x) with high thermodynamic stability. | Session 97: Topological Materials: Magnetic and Quantum Effects |
| 1366 | Ultrafast carrier dynamics in the ferromagnetic semimetal EuCd2As2 | ONeal, Ken; Padmanabhan, Prashant; Mix, La Moyne; Lee, Min; Sirica, Nicholas; Kuthanazhi, Brinda; Bud’ko, Sergey L.; Canfield, Paul; Prasankumar, Rohit; Yarotski, Dmitry | We report the near-infrared pump-probe ultrafast response of the ferromagnetic candidate Weyl semimetal EuCd 2As 2. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1367 | Broken-helix antiferromagnetic order protecting a crystalline axion insulator phase and exotic surface states in EuIn2As2 | Riberolles, Simon; Victa Trevisan, Thais; Kuthanazhi, Brinda; Heitmann, Thomas; Ye, Feng; Johnston, David; Bud’ko, Sergey L.; Ryan, Dominic; Canfield, Paul C.; Kreyssig, Andreas; Vishwanath, Ashvin; McQueeney, Robert; Wang, Lin-Lin; Orth, Peter; Ueland, Benjamin | We predict that modest values of applied magnetic field can switch between the different surfaces states. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1368 | Anomalous Quantum oscillations of magnetic topological semimetal EuCd2Sb2 | Shi, Yue; Jiang, Qianni; Liu, Zhaoyu; Chu, Jiun-Haw | In this talk, I will present the quantum oscillations study of an antiferromagnetic topological insulator EuCd2Sb2, which was proposed to be a magnetic Weyl semimetal in the field-induced ferromagnetic state. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1369 | Solution growth and physical properties of RPd3S4 topological semimetals | Slade, Tyler; Wang, Lin-Lin; Budko, Sergey; Canfield, Paul C. | We present a study of the sulfide bronzes RPd 3S 4 (R = rare earth), which adopt the cubic Pm-3n structure. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1370 | Experimental electronic structure of the electronically switchable antiferromagnet, CuMnAs | Linn, Andrew; Gordon, Kyle; HAO, PEIPEI; Narayan, Dushyant; Berggren, Bryan; Speiser, Nathaniel; Reimers, Sonka; Smejkal, Libor; Jungwirth, Thomas; Denlinger, Jonathan; Wadley, Peter; Dessau, Daniel | We report direct measurements of the electronic structure of single-crystalline thin films using ARPES. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1371 | Topological Descendants of Multicritical EuTl2 | Wang, Lin-Lin; Po, Hoi Chun; Slager, Robert-Jan; Vishwanath, Ashvin | Here we describe a paradigmatic semimetal that simultaneously incorporates multiple, and sometimes conflicting topology which guarantees gaplessness and leads to an exceptionally rich family of descendent phases on lowering symmetry. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1372 | Exploring broken time-reversal symmetry in Cd3As2/(Ga,Mn)Sb Dirac semimetal/ferromagnetic semiconductor heterostructures | Mitra, Arpita; Xiao, Run; Grutter, Alexander; Borchers, Julie; Kirby, Brian; Quarterman, Patrick; SAMARTH, NITIN | We aim to break time reversal symmetry (TRS) in Cd 3As 2 by interfacing with a ferromagnetic semiconductor (Ga,Mn)Sb.We have grown epitaxial Cd 3As 2 /(Ga,Mn)Sb bilayers by molecular beam epitaxy on GaSb(111) buffer layer using GaAs(111)B substrates.High-resolution XRD shows good crystalline quality of Cd 3As 2 layers with full width half maximum of rocking curves ~0.11°. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1373 | Investigation into the Eu Based 122 Family of Magnetic Topological Candidates | Marshall, Madalynn; Pletikosić, Ivo; Chang, Tay-Rong; Cao, Huibo; Xie, Weiwei | This research highlights the new intrinsic magnetic topological quantum material candidate, EuMg2Bi2. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1374 | Linear and Nonlinear Optical Spectroscopy Studies of a Magnetic Weyl Semimetal Co3Sn2S2 | Ahn, Youngjun; Owen, Rachel; Drueke, Elizabeth; Qu, Kejian; Xue, Rui; Mandrus, David; Zhao, Liuyan | In this talk, we will present our selective studies of the surface and bulk properties by conducting optical rotational anisotropy experiments of second and third harmonic generations (S/THG), respectively, using near-infrared wavelength light. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1375 | Time- and angle-resolved photoemission spectroscopy of the intrinsic antiferromagnetic topological insulator EuSn2P2 | Bielinski, Nina; Kim, Soyeun; Gebre, Mebatsion; Shoemaker, Daniel; Mahmood, Fahad | Here we use time- and angle- resolved photoemission spectroscopy (tr-ARPES) to observe and characterize the Dirac surface states of EuSn 2P 2 both above and below T N. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1376 | Magnetic sturcutre of an intrinsic magnetic topological insulator, EuSn2As2, probed via X-ray resonant exchange scattering | Islam, Zahir; Welp, Ulrich; Chung, Duck Young; Kwok, Wai-Kwong; Kanatzidis, Mercouri | In this work, we used high-resolution resonant X-ray scattering to study magnetic long-range order in the recently discovered topological material EuSn 2As 2. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1377 | Structural and physical properties of topological semimetal candidate EuZn2As2 | Blawat, Joanna; Marshall, Madalynn; Cao, Huibo; Xie, Weiwei; Jin, Rongying | Structural and physical properties of topological semimetal candidate EuZn2As2 | Session 98: Magnetic Topological Materials 7: New Materials |
| 1378 | Magnetic order in the Dirac material EuMnSb2 | Wilde, John; Ueland, Benjamin; Riberolles, Simon; Ryan, Dominic; Kreyssig, Andreas; Vaknin, David; Heitmann, Thomas; Liu, Yong; Budko, Sergey; McQueeney, Robert | Here we present results from single-crystal neutron diffraction experiments on EuMnSb 2. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1379 | Onset of non-linear IV transport with magnetic order in a Mott insulator | Berry, Tanya; Ryan, Dominic; Stern, Raivo; Kumar, Nitesh; Varnava, Nicodemos; Stewart, Veronica; Schnelle, Walter; Banda, Rishi; Morano, Vincent; Lui, Defa; Mu, Qingge; Bhaskaran, Lakshmi; Pasco, Christopher; Ali, Mazhar; Armitage, Norman; Broholm, Collin; Felser, Claudia; Vanderbilt, David; McQueen, Tyrel | Our results in this work could reveal some unanswered questions of conduction and spins in the Mott Insulator model. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1380 | Magnetic generation and switching of topological quantum phases in a trivial semimetal α-EuP3 | Mayo, Alex; Takahashi, Hidefumi; Bahramy, Mohammad; Nomoto, Atsuro; Sakai, Hideaki; Ishiwata, Shintaro | So far, we have observed the anomalous Hall effect, which abruptly emerges at a certain value of magnetization. | Session 98: Magnetic Topological Materials 7: New Materials |
| 1381 | Multipole theory of Majorana fermions in topological superconductors | Sato, Masatoshi | We develop here a theory of electric and magnetic responses of Majorana fermions in superconductors and clarify the relation between the electromagnetic responses and Cooper pair symmetry [1,2]. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1382 | Observation of half-quantum flux in topological superconductor β-Bi2Pd | Li, Yufan; Xu, Xiaoying; Lee, M.-H.; Chu, M.-W.; Chien, C. L. | We report the observation of half-integer magnetic flux quantization in mesoscopic rings of superconducting β-Bi 2Pd thin films [1]. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1383 | Control of the nematic superconductivity of SrxBi2Se3 and its domains by uniaxial strain | Yonezawa, Shingo; Kostylev, Ivan; Wang, Zhiwei; Ando, Yoichi; Maeno, Yoshiteru | Control of the nematic superconductivity of SrxBi2Se3 and its domains by uniaxial strain | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1384 | A First-Principles Prediction of Topological Superconductivity in β-PdBi2 | Tutchton, Roxanne; Zhu, Jian-Xin | Using density functional perturbation theory (DFPT) and taking into account the strong spin-orbit coupling (SOC) present in PdBi 2, we will determine if a Migdal-Eliashberg treatment of the electron-phonon coupling can predict the experimentally measured T c of β-PdBi 2 (T c= 4.25-5.4 K) [1]. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1385 | Chiral topological superconducting phase with Chern number C=2 in Pb3Bi/Ge(111) system | Sun, Shuwen; Qin, Wei; Li, Leiqiang; Zhang, Zhenyu | Here we develop an effective tight-binding description of Pb 3Bi/Ge(111), a candidate system for realizing chiral p-wave topological superconductor [Nat. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1386 | Spin-triplet Superconductivity Evidenced by Half Quantum Flux in a Non-centrosymmetric Superconductor | Xu, Xiaoying; Li, Yufan; Chien, C. L. | Spin-triplet Superconductivity Evidenced by Half Quantum Flux in a Non-centrosymmetric Superconductor | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1387 | Superconducting properties in the topological superconductor candidate PbTaSe2 family | MUNIR, RIFFAT; Siddiquee, K A M Hasan; Dissanayake, Charuni; Hu, Xinzhe; Takano, Yasumasa; Choi, Eun Sang; Nakajima, Yasuyuki | Here we present the superconducting properties of single crystals of PbTaSe 2 family. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1388 | Potential topological superconductivity in doped IV-VI semiconductors | Li, Zhe | We theoretically study potential superconductivity in doped IV-VI semiconductors in the presence of the interaction restricted to the next nearest neighbors. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1389 | Majorana Fermion in Topological Superconducting Element Hcp Thallium | Hirayama, Motoaki; Nomoto, Takuya; Arita, Ryotaro | Here, we perform 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 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1390 | Superconductivity in the nonsymmorphic line-nodal compound CaSb2 | Ikeda, Atsutoshi; Kawaguchi, Mayo; Koibuchi, Shun; Takahashi, Hidemitsu; Kitagawa, Shunsaku; Ishida, Kenji; Hashimoto, Tatsuki; Kawakami, Takuto; Yonezawa, Shingo; Sato, Masatoshi; Maeno, Yoshiteru | We found superconductivity in CaSb 2 with the transition onset of 1.8 K by means of electrical-resistivity, magnetic-susceptibility, and specific-heat measurements [1]. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1391 | Multi-component Chiral Topological Superconductors in 2D Superlattices | Santos, Luiz; Iyer, Lakshmi; Wang, Jian; Shaffer, Daniel | I will discuss the onset of time-reversal symmetry breaking superconductivity in such systems, and demonstrate the existence of mean-field superconductors characterized by multi-component triplet order parameters, which are greatly constrained by the action of the magnetic translation group. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1392 | Order Parameter and Edge Currents of a 2D Topological Superconductor under Consecutive Symmetry Breakings | Holst, Maximilian; Sigrist, Manfred; Fischer, Mark | Specifically, we investigate for a two-dimensional superconductor with Rashba spin-orbit coupling (broken mirror symmetry) and an out-of-plane Zeeman field (broken time-reversal symmetry) how the superconducting order parameter adapts under these consecutive symmetry reductions. | Session 99: Topological Superconductivity: Symmetry Breaking and Spin-Orbit Coupling |
| 1393 | Mechanism of the Metal-Insulator Transition And Its Length Scales in Complex Oxides: Theory, Experiment and Machine Learning | Georgescu, Alexandru Bogdan | In this talk, I will provide a theoretical and experimental discussion of new results that have helped us address this question. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1394 | Length scales of interfacial coupling between metal and insulator phases in oxides | Dominguez Ordonez, Claribel; Georgescu, Alexandru Bogdan; Mundet, Bernat; Zhang, Yajun; Mercy, Alain; Fowlie, Jennifer; Catalano, Sara; Alexander, Duncan; Ghosez, Philippe; Millis, Andrew; Georges, Antoine; Gibert, Marta; Triscone, Jean-Marc | In this work, we use experimental and theoretical methods to design and study superlattices of two distinct rare earth nickelate oxides SmNiO 3 and NdNiO 3 that in bulk form show a MIT at two very different temperatures (400 K and 200 K, respectively). | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1395 | Design of a multifunctional polar metal via first-principles high-throughput calculations | Fang, Yue-Wen; Chen, Hanghui | Our work demonstrates the power of high-throughput screening in designing new functional materials and in particular predicts a new electrically switchable polar metal. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1396 | The band-filling controlled Mott transition in the correlated oxide LaTiO3 | Gabel, Judith; Leikert, Berengar; Scheiderer, Philipp; Weis, Johannes; Kirilmaz, Ozan; Sing, Michael; Claessen, Ralph; Lee, Tien Lin | Here we study the electronic structure across the band-filling induced phase transition in LaTiO 3 using angle-resolved photoemission spectroscopy as well as complementary transport experiments. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1397 | Ferroionic generation of superconductivity in a non-superconducting cuprate | Gallego, Fernando; Seurre, Kevin; Cabero, Mariona; Rouco, Victor; Sander, Anke; Cuellar, Fabian; Tornos, Javier; Hernandez-Martin, David; Sefrioui, Zouhair; Rivera, Alberto; Varela, Maria; Garcia Hernandez, Mar; Mompean, Federico; Gonzalez-Calbet, Jose; 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 5SrCu 6O 15 (LSCO) top electrode. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1398 | Zero Field Transverse Resistance in AlOx/SrTiO3 Heterostructures | Krantz, Patrick; Chandrasekhar, Venkat | Here we discuss our recent findings of a finite transverse resistance in zero field, in the 2DCG between amorphous aluminum oxide (AlO x) and (001) and (111) oriented STO substrates. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1399 | Formation of dislocations via misfit strain across interfaces in epitaxial heterostructures | Saghayezhian, Mohammad; Wang, Zhen; Howe, David; Siwakoti, Prahald; Zhu, Yimei; Zhang, Jiandi | Formation of dislocations via misfit strain across interfaces in epitaxial heterostructures | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1400 | On the character of the insulator-metal transition at polar-nonpolar perovskite interfaces | Bennett, Daniel; Artacho, Emilio; Bristowe, Nicholas | We propose a theory of 2DEG formation at a polar-nonpolar interface which includes coupling to tilts. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1401 | Electronic Structure and Small Hole Polarons in YTiO3 | Yue, Jin; Quackenbush, Nicholas; Laraib, Iflah; Carfagno, Henry; Hameed, Sajna; Prakash, Abhinav; Thoutam, Laxman Raju; Ablett, James; Lee, Tien-Lin; Greven, Martin; Doty, Matthew; Janotti, Anderson; Jalan, Bharat | As a prototypical Mott insulator with ferromagnetic ordering, YTiO 3 (YTO) is of great interest in the study of strong electron correlation effects and orbital ordering. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1402 | Unexpected Transport Behavior in (001) and (111) Crystal Oriented AlOx / SrTiO3 Devices | Krantz, Patrick; Chandrasekhar, Venkat | Here we report temperature and gate voltage dependent transport measurements on AlO x/STO interface devices. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1403 | Nonlinear transport in 2D Rashba superconductor SrTiO3 | Itahashi, Yuki; Ideue, Toshiya; Saito, Yu; Shimizu, Sunao; Ouchi, Takumi; Nojima, Tsutomu; Iwasa, Yoshihiro | We found the gigantic enhancement in the nonlinear resistance in the amplitude and phase fluctuation regions [5]. | Session 100: Metal-Insulator Transitions and Doping, 2DEGs, and Electric-Field Effects at Oxide Interfaces |
| 1404 | Spin-liquids on the triangular lattice in a spin model approximating the Hubbard model | Cookmeyer, Taylor; Motruk, Johannes; Moore, Joel | To better understand the competition between these phases in the spin model, we use both exact diagonalization and the infinite density-matrix renormalization group to characterize the extended phase diagram of the spin Hamiltonian. | Session 101: Spin Liquid |
| 1405 | Ba3NiIr2O9: a three-dimensional spin liquid with two magnetic sublattices | Kumar, Siddharth; Panda, Swarup; Patidar, Manju; Ojha, Shashank; Mandal, Prithwijit; Das, Gangadhar; Freeland, John; Ganesan, V; Baker, Peter; Middey, Srimanta | We devised a new strategy to find such candidates by utilizing two magnetically active ions at different crystallographic locations. | Session 101: Spin Liquid |
| 1406 | Quantum spin liquids with tunable Fermi surfaces in spin-chain arrays | Leviatan, Eyal; Mross, David | Using bosonization techniques, we introduce a coupled spin-chain model that maps exactly onto a theory of two spinons coupled to an emergent photon. | Session 101: Spin Liquid |
| 1407 | Design and Synthesis of Quantum Spin Liquid Candidates | Cava, Robert | In this talk I will describe some of the materials that my undergrads, grad students and postdocs have found and investigated in this regard. | Session 101: Spin Liquid |
| 1408 | 1T-TaS2 as a quantum spin liquid: from bulk to atomically-thin layers. | Mañas-Valero, Samuel; Coronado, Eugenio | Here, we report on bulk and atomically thin-layers of 1T-TaS 2. | Session 101: Spin Liquid |
| 1409 | Projective symmetry group classifications of quantum spin liquids on the simple cubic, body centered cubic, and face centered cubic lattices | Sonnenschein, Jonas | We perform extensive classifications of Z 2 quantum spin liquids on the simple cubic, body centered cubic, and face centered cubic lattices using a spin-rotation-invariant fermionic projective symmetry group approach. | Session 101: Spin Liquid |
| 1410 | 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; Podlesnyak, Andrey; Wu, Yan; Cao, Huibo; Umehara, Izuru; Gouchi, Jun; Uwatoko, Yoshiya; Matsuda, Masaaki; Tennant, David; Schmidt, Kai; Wessel, Stefan | Here we present a comprehensive study of the effect of hydrostatic pressure on the magnetic structure and spin dynamics in a spin-1/2 coupled ladder antiferromagnet C 9H 18N 2CuBr 4 (DLCB for short). | Session 101: Spin Liquid |
| 1411 | Collective modes of magnetized spin liquids. | Starykh, Oleg | We describe how the Dzyaloshinskii-Moriya interaction can be used to detect the interaction-induced splitting of transverse spin modes at small momentum in the ESR experiments. | Session 101: Spin Liquid |
| 1412 | Spin-orbit coupled heavy metals as a probe of frustrated magnetic systems | Nagarajan, Vikram; Lachman, Ella; Taghinejad, Hossein; Analytis, James | Spin-orbit coupled heavy metals as a probe of frustrated magnetic systems | Session 101: Spin Liquid |
| 1413 | Hybridized quadrupolar excitations in the spin-anisotropic frustrated magnet FeI2 | Bai, Xiaojian; Zhang, Shang-Shun; Dun, Zhiling; Zhang, Hao; Huang, Qing; Zhou, Haidong; Phelan, W. Adam; Stone, Matthew; Kolesnikov, Alexander; Ye, Feng; Garlea, Vasile; Podlesnyak, Andrey; Batista, Cristian; Mourigal, Martin | Our work highlights that quantum excitations without classical counterparts can be realized even in presence of fully developed magnetic order. | Session 101: Spin Liquid |
| 1414 | Dielectric properties of the linear quantum ferro-antiferromagnetic Rb2Cu2Mo3O12 | Hayashida, Shohei; Huberich, Lysander; Flavian Blasco, Daniel; Yan, Zewu; Povarov, Kirill; Gvasaliya, Severian; Zheludev, Andrey | We now report the first study of dielectric properties of Rb 2Cu 2Mo 3O 12 using single crystal samples. | Session 101: Spin Liquid |
| 1415 | Theory of Competing Orders in Two Dimensional Quantum Magnets | Song, Xueyang | We explore a promising framework in 2D lattice , the Dirac spin liquid (DSL), a version of Quantum Electrodynamics (QED3) with four flavors of Dirac fermions coupled to photons. | Session 101: Spin Liquid |
| 1416 | Magnetic phase diagram of the frustrated quantum ferro-antiferromagnet Cs2Cu2Mo3O12 | Flavian Blasco, Daniel; Hayashida, Shohei; Huberich, Lysander; Blosser, Dominic; Povarov, Kirill; Yan, Zewu; Gvasaliya, Severian; Zheludev, Andrey | Magnetic phase diagram of the frustrated quantum ferro-antiferromagnet Cs2Cu2Mo3O12 | Session 101: Spin Liquid |
| 1417 | Valence-Bond Order in a Honeycomb Antiferromagnet Coupled to Quantum Phonons | Weber, Manuel | We use exact quantum Monte Carlo simulations to demonstrate that the Neel ground state of an antiferromagnetic SU(2) spin-1/2 Heisenberg model on the honeycomb lattice can be destroyed by a coupling to quantum phonons. | Session 101: Spin Liquid |
| 1418 | Band topology of magnetic excitations in anisotropic quantum magnets | Romhanyi, Judit; Thomasen, Andreas; Shannon, Nicholas; Penc, Karlo | Here we explore the topology of multiplet excitations arising due to the local entanglement of spin and/or orbital degrees of freedom. | Session 101: Spin Liquid |
| 1419 | Spin-Excitations of 1T-TaS2 and Related Magnetoresistance in the 4Hb Phase | Silber, Itai; Kimchi, Itamar; Graf, David; Kanigel, Amit; Dagan, Yoram | We interpret our data in the framework of a quantum spin liquid ground state having a large bandwidth with minority spins forming an array of singlet pairs with a continuum of coupling constants. | Session 101: Spin Liquid |
| 1420 | Featureless quantum paramagnet with frustrated criticality and competing spiral magnetism on spin-1 honeycomb lattice magnet | Liu, Jianqiao; Li, Fei-Ye; Chen, Gang; Wang, Ziqiang | We study the spin-1 honeycomb lattice magnets with frustrated exchange interactions. | Session 101: Spin Liquid |
| 1421 | Exact tensor network representations for a frustrated spin system at large finite S | Lo, Po-Wei; Lawler, Michael | The tensor network approach has been shown to be a powerful tool to study entanglement of frustrated spin systems. | Session 101: Spin Liquid |
| 1422 | Investigating the Magnetism of the Honeycomb Arsenate KCo2(AsO4)(HAsO4) | Felder, Justin | In this talk I will discuss our ongoing investigations into characterizing the properties of KCo 2(AsO 4)(HAsO 4), including the hydrothermal synthesis of polycrystalline samples, X-ray diffraction measurements, magnetic susceptibility measurements, neutron diffraction measurements, and DFT calculations. | Session 101: Spin Liquid |
| 1423 | Mode-Entangled Neutron Beams: A possible new tool for exploring Quantum Materials | Kuhn, Stephen; McKay, Samuel; Baxter, David; Broholm, Collin; Dees, Eric; Li, Fankang; Pynn, Roger; Irfan, Abu Ashik Md.; Ortiz, Gerardo; Shen, Jiazhou; Snow, William; Vangelista, Vincent | Mode-Entangled Neutron Beams: A possible new tool for exploring Quantum Materials | Session 101: Spin Liquid |
| 1424 | Numerical Study of Bond-Nematic Order in Spin S=1/2 Frustrated Ferromagnets on the Square Lattice | Gohlke, Matthias; Shimokawa, Tokuro; Shannon, Nicholas | Motivated by recent experiments suggesting the existence of spin-nematic order in volborthite in applied magnetic field [Kohama2019], we revisit the square-lattice frustrated ferromagnets using a combination of modern numerical techniques, namely matrix-product states based methods and high-field exact diagonalization. | Session 101: Spin Liquid |
| 1425 | Spiral Spin Liquid Regardless of Spin Component on a Honeycomb Lattice | Huang, Chun-Jiong; Liu, Jianqiao; Chen, Gang | In this work, we study the antiferromagnetic Ising, XY, and Heisenberg models with an additional second-neighbor antiferromagnetic exchange on a honeycomb lattice. | Session 101: Spin Liquid |
| 1426 | Chiral multi-spin multi-site interactions | Brinker, Sascha; dos Santos Dias, Manuel; Lounis, Samir | Here, we discuss our systematic construction of a generalized spin model containing isotropic and chiral multi-site interactions [1,2]. | Session 102: Novel Topological Spin Textures |
| 1427 | Doping effects and higher-order magnetic interactions in skyrmionic B20 compounds | Borisov, Vladislav; Ntallis, Nikolaos; Kvashnin, Yaroslav; Thonig, Danny; Pereiro, Manuel; Bergman, Anders; Sjöqvist, Erik; Delin, Anna; Nordström, Lars; Eriksson, Olle | Using the magnetic force theorem, we obtain a detailed picture of magnetic interactions, including Heisenberg, Dzyaloshinskii-Moriya (DM), and symmetric anisotropic exchange. | Session 102: Novel Topological Spin Textures |
| 1428 | Spin Moiré Engineering of Emergent Electromagnetism | Shimizu, Kotaro; Okumura, Shun; Kato, Yasuyuki; Motome, Yukitoshi | We find that the manipulation of the Moiré patterns by the angles between the superposed helices and the net magnetization yields successive topological transitions associated with pair annihilation of topological defects called hedgehogs and antihedgehogs. | Session 102: Novel Topological Spin Textures |
| 1429 | Chiral magnetism: a geometric perspective | Hill, Daniel; Tchernyshyov, Oleg; Slastikov, Valeriy | Chiral magnetism: a geometric perspective | Session 102: Novel Topological Spin Textures |
| 1430 | Magnetic textures with particle properties beyond skyrmions: chiral bobbers, globules, and hopfions | Kiselev, Nikolai S. | I will present the micromagnetic functional [8] and magnetic interactions allowing the stability of these objects and discuss some static and dynamic properties of these objects. | Session 102: Novel Topological Spin Textures |
| 1431 | Experimental observation of magnetic hopfions in multilayer disks | Kent, Noah; Reynolds, Neal; Raftrey, David; Campbell, Ian; Virasawmy, Selven; Dhuey, Scott; Chopdekar, Rajesh; Hierro-Rodriguez, Aurelio; Sorrentino, Andrea; Pereiro, Eva; Ferrer, Salvador; Hellman, Frances; Sutcliffe, Paul; Fischer, Peter | We present experimental evidence of magnetic Hopfions in magnetic Ir/Co/Pt multilayers shaped into nanoscale disks, which are known to host TSks 5. | Session 102: Novel Topological Spin Textures |
| 1432 | Ultrafast spin dynamics in Magnetic Hopfions | Raftrey, David; Fischer, Peter | Here, we present results from micromagnetic simulations using mumax3 implemented at the HPC Lawrencium supercluster at Berkeley Lab. | Session 102: Novel Topological Spin Textures |
| 1433 | Antiferromagnetic Half-skyrmions and Bimerons at room temperature | Jani, Hariom; Lin, Jheng-Cyuan; Chen, Jiahao; Harrison, Jack; Maccherozzi, Francesco; Schad, Jonathon; Prakash, Saurav; Eom, Chang-Beom; Ariando, Ariando; Venkatesan, Thirumalai; Radaelli, Paolo G. | Here, we demonstrate a family of topological antiferromagnetic spin-textures in α-Fe 2O 3 – an earth-abundant oxide – capped with a Pt over-layer. | Session 102: Novel Topological Spin Textures |
| 1434 | Designing inverse-Heusler antiskyrmion hosts by chemically tailoring the effective magnetic Hamiltonian | Kitchaev, Daniil; Van der Ven, Anton | We construct a universal model relating mesoscale magnetic phase behavior to atomistic interactions and map out the magnetic behavior of a wide range of candidate chemistries to identify compositions yielding the precise magnetic Hamiltonian necessary for antiskyrmion formation. | Session 102: Novel Topological Spin Textures |
| 1435 | Magnetic vortex-antivortex pairs in the magnetic stripe domain pattern: magnetization reversal and topology. | Velez, Maria; Hierro-Rodriguez, Aurelio; Fernandez, Victoria Vega; Hermosa, Javier; Quiros, Carlos; Sorrentino, Andrea; Alvarez Prado, Luis Manuel; Martín, Jose I.; Pereiro, Eva; Ferrer, Salvador | In this work, we will present the analysis of topological charge transformations during the nucleation/propagation process based on micromagnetic simulations of NiFe/NdCo/NiFe multilayers and experimental 3D magnetization maps obtained from X-ray vector magnetic tomography of NiFe/NdCo/NiFe trilayers [2,3]. | Session 102: Novel Topological Spin Textures |
| 1436 | Topological transport of deconfined hedgehogs in magnets | Zou, Ji; Zhang, Shu; Tserkovnyak, Yaroslav | We theoretically investigate the dynamics of magnetic hedgehogs, which are three-dimensional topological spin textures that exist in common magnets, focusing on their transport properties and connections to spintronics. | Session 102: Novel Topological Spin Textures |
| 1437 | Deformation of spin-hedgehog lattice in MnGe | Kitaori, Aki; Kanazawa, Naoya; White, Jonathan; Ukleev, Victor; Ronnow, Henrik; Tsukazaki, Atsushi; Ichikawa, Masakazu; Kawasaki, Masashi; Tokura, Yoshinori | We observe a dramatic change in the Hall effect upon the transformation of a spin hedgehog crystal in MnGe through combined measurements of magnetotransport in single crystals and small-angle neutron scattering (SANS) [3]. | Session 102: Novel Topological Spin Textures |
| 1438 | Magneto-transport and magnetic ordering in the intercalated transition metal dichalcogenides. | Mayoh, Daniel; Hall, Amelia; Holt, Sam; Lees, Martin; Balakrishnan, Geetha | We present our recent studies of the magneto-transport properties and magnetic state in these TMDCs where several different magnetic atoms (Cr, Mn, V) have been intercalated. | Session 102: Novel Topological Spin Textures |
| 1439 | Propagating spinons and magnons in coupled quantum spin chains | Ke, Xianglin | In this talk, I will present our recent neutron scattering and theoretical studies of a unique quasi-1D quantum spin system, Cu 2(OH) 3Br, which consists of weakly-coupled, ferromagnetic and antiferromagnetic alternating chains [1]. | Session 103: Spin Chains and Multimetallic Systems |
| 1440 | Excitations of critical quantum spin chains from non-equilibrium classical dynamics | Vinet, St��phane; Longpré, Gabriel; Witczak-Krempa, William | We give the exact groundstates, and single magnon excitations. | Session 103: Spin Chains and Multimetallic Systems |
| 1441 | Evolution of the quantum phase transitions in XXY general spin trimers with applied magnetic field and variable exchange parameters | Brumfield, Amelia; Haraldsen, Jason | This study investigates the thermodynamics and magnetic excitations of XXY general spin isosceles quantum trimers with a variable magnetic field and exchange parameters. | Session 103: Spin Chains and Multimetallic Systems |
| 1442 | Weakly-coupled alternating S=1/2 chains in the distorted honeycomb-lattice compound Na2Cu2TeO6 | Gao, Shang; Lin, Ling-Fang; May, Andrew; Rai, Binod; Zhang, Qiang; Dagotto, Elbio; Christianson, Andrew; Stone, Matthew | Here we employ neutron scattering to study the spin dynamics in Na 2Cu 2TeO 6 and accurately determine the coupling strengths through the random phase approximation and density functional theory (DFT) approaches. | Session 103: Spin Chains and Multimetallic Systems |
| 1443 | Magnetization plateau of the S=2 antiferromagnetic Heisenberg chain with anisotropies | Sakai, Toru; Okamoto, Kiyomi; Tonegawa, Takashi | Magnetization plateau of the S=2 antiferromagnetic Heisenberg chain with anisotropies | Session 103: Spin Chains and Multimetallic Systems |
| 1444 | Comparison of spin dynamics in green and black dioptase: from classical chains to quantum fluctuations | Podlesnyak, Andrey; Nikitin, Stanislav; Prokhnenko, Oleksandr; Kolesnikov, Alexander; Prisk, Timothy; Anovitz, Larry | We found that dehydration has a dual effect on the magnetic interactions: it significantly increases the intrachain exchange interaction Jc, and simultaneously decouples the chains by suppressing Jab. | Session 103: Spin Chains and Multimetallic Systems |
| 1445 | Single-ion properties of quasi-1D transverse Ising-critical CoNb2O6 | Ringler, John; Kolesnikov, Alexander; Ross, Kate | We present the results of both inelastic neutron scattering measurements and electron paramagnetic resonance spectroscopy on CoNb 2O 6, which explores the single-ion anisotropy present in the local environments of the Co 2+ ions in an effort to shed light on these recent developments. | Session 103: Spin Chains and Multimetallic Systems |
| 1446 | Giant pressure-enhancement of multiferroicity in CuBr2 from first principles | Razpopov, Aleksandar; Borisov, Vladislav; Normand, Bruce; Valenti, Roser | We provide a quantitative explanation by two-step density-functional-theory calculations that include correlations by GGA+U. | Session 103: Spin Chains and Multimetallic Systems |
| 1447 | Rashba + exchange” effects in 1D magnets: bismuth nanoribbons as model systems | Naumov, Ivan; Dev, Pratibha | Rashba + exchange” effects in 1D magnets: bismuth nanoribbons as model systems | Session 103: Spin Chains and Multimetallic Systems |
| 1448 | Competing Magnetic Ground States of Novel Sawtooth Co2+ S = 3/2 Chains in NaCo2(SeO3)2(OH) | Sanjeewa, Duminda; Xing, Jie; Garlea, Vasile; Taddei, Keith | Recently we have synthesized single crystals of NaCo 2(SeO 3) 2(OH) and characterized the crystals structure. | Session 103: Spin Chains and Multimetallic Systems |
| 1449 | Level statistics of a critical quantum spin chain from non-equilibrium classical dynamics | Longpré, Gabriel; Vinet, St��phane; Witczak-Krempa, William | Level statistics of a critical quantum spin chain from non-equilibrium classical dynamics | Session 103: Spin Chains and Multimetallic Systems |
| 1450 | Helical spin structure of 1D chains with hybridized boundaries | Vargas, Nicolas; Baker, Alexander; Torres, Felipe; Pico, Roman; Lee, Jonathan R.I.; Hamad, Ignacio; Abufager, Paula; Kiwi, Miguel; Willey, Trevor; Monton, Carlos; Schuller, Ivan | We have synthesized and studied quantitatively the structure and magnetic properties of ultra-short 1D Fe chains subject to various boundary conditions. | Session 103: Spin Chains and Multimetallic Systems |
| 1451 | Engineering magnetic edge states in zigzag graphene nanoribbons | Blackwell, Raymond; Zhao, Fangzhou; Brooks, Erin; Piskun, Ilya; Wang, Shenkai; Zhu, Junmian; Lee, Yea-Lee; Louie, Steven; Fischer, Felix | We describe the bottom-up synthesis of ZGNRs featuring a superlattice of heteroatom dopants along the zigzag edge. | Session 103: Spin Chains and Multimetallic Systems |
| 1452 | Probing the current phase relation of Josephson junctions in an InSbAs 2-dimensional electron gas | Ke, Chung-Ting; Moehle, Christian; Thomas, Candice; Xiao, Di; Lodari, Mario; van de Kerkhof, Vincent; Termaat, Ruben; Karwal, Saurabh; Guinn, Charles; Kallaher, Raymond; Gardner, Geoffrey; Scappucci, Giordano; Manfra, Michael; Goswami, Srijit | We study SQUIDs in a hybrid Al/InSbAs 2-dimensional electron gas, a material with large spin-orbit coupling and g-factor. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1453 | Topology, braiding, and disorder in planar Josephson junctions | 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 104: Topological Superconductivity: Planar Josephson Junctions |
| 1454 | Shapiro Steps and Negative Absolute Resistance in Microwave-Driven Shunted Josephson Junctions | Heiba Elfeky, Bassel; Dartiailh, Matthieu; Yuan, Joseph; Wickramasinghe, Kaushini; Shabani, Javad | In this work, we observe and study these dynamics in 100nm JJs fabricated on InAs surface quantum wells coupled to epitaxial Al contacts in relation to the applied microwave bias amplitude and frequency as well as an applied external magnetic field. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1455 | Scanning Probe Study of Topological Insulator Josephson Junctions | Gottschalk, Michael; Yue, Guang; Goodwin, Eric; Arias, Gilbert; Van Harlingen, Dale; Tessmer, Stuart | We present progress towards testing for Majorana bound states in superconductor-topological insulator (S-TI) heterostructures. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1456 | Topological Superconductivity in Crystalline Anisotropic Josephson Junctions | Pakizer, Joseph; Scharf, Benedikt; Matos Abiague, Alex | We theoretically investigate the emergence of Topological Superconductivity (TS) in planar JJs [1,2] subject to Rashba and Dresselhaus spin-orbit couplings (SOCs) and in-plane magnetic field. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1457 | Signatures of flux-dependent Majorana zero modes in a finite-width topological Josephson junction | Abboud, Nick; Subramanyan, Varsha; Sun, Xiao-Qi; Hegde, Suraj; Vishveshwara, Smitha | We present a theoretical study of MZMs and Josephson currents in a junction between two finite-sized p x+ip y superconductor islands, where a key role is played by a delocalized MZM on the system’s outer boundary. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1458 | Dynamics of Majorana Bound States in a thin annular topological Josephson junction | Subramanyan, Varsha; Abboud, Nick; Sun, Xiaoqi; Vishveshwara, Smitha | In this context, we study the topological Josephson junction in annular geometries. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1459 | Phase Controlled Topological Superconductivity | Yacoby, Amir | Here we present a novel experimental approach towards a two-dimensional architecture. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1460 | Probing the parity of Majorana bound states in lateral S-TI-S Josephson junctions via SET detectors and fusion operations | Montone, Jessica; Yue, Guang; Arias, Gilbert; Yao, Xiong; Jain, Deepti; Moon, Jisoo; Oh, Seongshik; Van Harlingen, Dale | We propose experiments designed to probe the parity of Majorana bound states (MBS) in S-TI-S (Superconductor-Topological Insulator-Superconductor) lateral Josephson junctions. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1461 | Topological Josephson junctions based on InGaAs quantum wells | Delfanazari, Kaveh; Serra, Llorens; ma, Pengcheng; Farrer, Ian; Ritchie, David; Joyce, Hannah; Kelly, Michael; Smith, Charles | Here, we report on the experimental observation of such topological phases in Josephson junctions, based on In0.75Ga0.25As 2DEG, by sweeping out-of-plane magnetic fields of as small as B(mT) < 100 and probing the conductance to highlight the characteristic quantized magnetoconductance plateaus. | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1462 | Asymmetric Fraunhofer Patterns of Bi2Se3 Josephson Junctions | Beach, Alexander; Mason, Nadya | Asymmetric Fraunhofer Patterns of Bi2Se3 Josephson Junctions | Session 104: Topological Superconductivity: Planar Josephson Junctions |
| 1463 | Real-time Hall-effect detection of current-induced magnetization dynamics in ferrimagnets | Sala, Giacomo; Krizakova, Viola; Grimaldi, Eva; Lambert, Charles-Henri; Devolder, Thibaut; Gambardella, Pietro | Here we present a novel concept to perform time-resolved measurements of Hall and transverse magnetoresistance signals. | Session 105: Spin Waves and Dynamics |
| 1464 | Magneto-Optical Studies of Static and Dynamic Spin Alignment in Ferrimagnetic Thin Films | Liu, Hengzhou; Shoup, Jenae; Khadka, Durga; Thapaliya, Tilak; Huang, Sunxiang; Karaiskaj, Denis; Arena, Dario | We investigate a series of ferrimagnetic thin film samples consisting of (FeCo) 1-xGd x and Fe 1-xGd x where the Gd content was varied to modify magnetic parameters. | Session 105: Spin Waves and Dynamics |
| 1465 | Surface properties influence on spin wave modes of ferromagnetic films | Arias, Rodrigo; Armijo, Ignacio | Thus, in order to relate films surface properties to the behavior of spin waves, we study theoretically, within the micro magnetic approximation, spin wave modes under obliquely applied magnetic fields to the film, since in this case the surface properties have a more clear influence in the spin wave properties. | Session 105: Spin Waves and Dynamics |
| 1466 | Tuneable, Rare-Earth Free, Synthetic Ferrimagnets for Optical Switching | Scott, Jade; Hendren, William; Bowman, Robert; Hicken, Robert; Dabrowski, Maciej; Burn, David; Van der Laan, Gerrit; Frisk, Andreas; N’Diaye, Alpha | We have shown it is possible to engineer the magnetic properties of a series of compensating Ni 3Pt/Ir/Co SFM exhibiting perpendicular magnetic anisotropy (PMA). | Session 105: Spin Waves and Dynamics |
| 1467 | Quasiparticle and Spin Dynamics in MnBi2Te4 using time-resolved magneto-optical Kerr spectroscopy. | Poore, Maxwell; Kim, Peter; Padmanabhan, Hari; Stoica, Vladimir; Lee, Seng Huat; Mao, Zhiqiang; Gopalan, Venkatraman; Averitt, Richard | In this presentation, we will delineate the field, fluence, and temperature dependence of the long time dynamics in this enigmatic antiferromagnetic topological insulator. | Session 105: Spin Waves and Dynamics |
| 1468 | Interactions between spin wave and magnetic domain structures | Liu, Luqiao | In this talk, I will describe our recent experimental activities on investigating the mutual interactions between magnetic domain wall and spin wave, where magnetic domain walls manipulate the phase and magnitude of spin wave, and a strong spin wave in turn moves the position of magnetic domain walls [1]. | Session 105: Spin Waves and Dynamics |
| 1469 | Wavelength-dependence of the spin-orbit optical properties of Au | Ortiz, Víctor; Coh, Sinisah; Wilson, Richard | We perform time-resolved Magneto optic Kerr effect (TR-MOKE) measurements on Au/Co heterostructures. | Session 105: Spin Waves and Dynamics |
| 1470 | Ultrafast Magnetic Spectroscopy and Scattering Using Tabletop High Harmonic Sources | Johnsen, Peter; Ryan, Sinead; Gentry, Christian; Cating-Subramanian, Emma; Kapteyn, Henry; Murnane, Margaret | We present spectroscopy and scattering measurements of nanomagnetic materials using EUV high harmonic sources. | Session 105: Spin Waves and Dynamics |
| 1471 | Optical spin-orbit torque and its application for spin-wave excitation | Choi, Gyung-Min | In this work, we report optical spin-orbit torques in heavy metal/ferromagnet heterostructures [1]. | Session 105: Spin Waves and Dynamics |
| 1472 | Measurement of Current Induce Spin Orbit Torque effects using Optical Ferromagnetic Resonance | Grover, Bharat; Hazra, Binoy Krishna; Pal, Banabir; Ma, Tianping; Choudhury, Samiran; Jeon, Jae; Bernstein, Nirel; Capua, Amir; Parkin, Stuart | Here we discuss a novel optical technique called the optically detected ferromagnetic resonance (O-FMR) to measure the spin Hall angle (SHA) in a conventional Py|Pt bilayer system [2]. | Session 105: Spin Waves and Dynamics |
| 1473 | Ferrimagnetic Spin Dynamics beyond Ferro- and Antiferro-magnetic Scenarios | Guo, Mingda; Zhang, Hantao; Cheng, Ran | By varying the ratio of sublattice spins, we demonstrate how spin dynamics in FIMs is intrinsically connected to its ferro- and antiferro-magnetic counterparts, and, more importantly, under what conditions FIMs can go beyond these scenarios. | Session 105: Spin Waves and Dynamics |
| 1474 | Nonlinear Optical Control of Chiral Charge Pumping in a Topological Weyl Semimetal | Kargarian, Mehdi; Jadidi, Mehdi | Theory based on Boltzmann transport shows that the observed effects originate from an optical nonlinearity in the chiral charge pumping process. | Session 106: Topological Materials: Chiral and Semimetals |
| 1475 | Anisotropic Fano resonance in a Weyl semimetal candidate LaAlSi | Zhang, Kunyan; Wang, Tong; Pang, Xiaoqi; Han, Fei; Shang, Shun-Li; Hung, Nguyen; Liu, Zi-Kui; Li, Mingda; Saito, Riichiro; Huang, Shengxi | In this work, we present the anisotropic Fano resonance in a type-II Weyl semimetal candidate LaAlSi by polarized Raman spectroscopy using five excitation wavelengths from UV to near-infrared. | Session 106: Topological Materials: Chiral and Semimetals |
| 1476 | Fermiology of topological semimetal candidate CaSn3 | Siddiquee, K A M Hasan; MUNIR, RIFFAT; Dissanayake, Charuni; Hu, Xinzhe; Yadav, Swapnil; Takano, Yasumasa; Choi, Eun Sang; Rahman, Talat; Le, Duy; Nakajima, Yasuyuki | Here, we present de Haas van Alphen quantum oscillations study for topological semimetal candidate CaSn 3 single crystal via torque magnetometry in high magnetic fields up to 35T. | Session 106: Topological Materials: Chiral and Semimetals |
| 1477 | Strain effects in topological semimetal ZrSiS | Wegner, Aaron; Pandey, Krishna; Basnet, Rabindra; Hu, Jin | Here, we present transport measurements on single crystal ZrSiS as a function of uniaxial strain. | Session 106: Topological Materials: Chiral and Semimetals |
| 1478 | Bulk Fermi surfaces of the Dirac type-II semimetallic candidate NiTe2 | Zheng, Wenkai; Schöenemann,, Rico; Mozaffari, Shirin; Chiu, Yu-Che; Goraum, Zachary; Aryal, Niraj; Manousakis, Efstratios; Siegrist, Theo; Wei, Kaya; Balicas, Luis | Here, we present a study on the Fermi-surface of the Dirac type-II semi-metallic candidate NiTe 2 via the temperature and angular dependence of the de Haas-van Alphen (dHvA) effect measured in single-crystals grown through Te flux. | Session 106: Topological Materials: Chiral and Semimetals |
| 1479 | Manipulating magnetism in the Weyl semimetal candidate EuCd2As2 by varying growth conditions and doping | 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; McQueeney, Robert; Burkov, Anton; Ryan, Dominic; Prozorov, Ruslan; Bud’ko, Sergey L.; Kaminski, Adam; Canfield, Paul | [1,2] Here, we present the synthesis details 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 106: Topological Materials: Chiral and Semimetals |
| 1480 | Fermi surface “hot” spots in topological chiral semimetal CoSi | Guo, Chunyu; Nenno, Dennis; Garcia, Christina; Manna, Kaustuv; Diaz, Jonas; Putzke, Carsten; Fan, Feng-Ren; Sun, Yan; Shekhar, Chandra; Felser, Claudia; Narang, Prineha; Moll, Philip | Here we present a fermiology study of CoSi based on angle-resolved Shubnikov–de Haas oscillation measurements. | Session 106: Topological Materials: Chiral and Semimetals |
| 1481 | Investigation of possible quantized circular photogalvanic effect in chiral multifold semimetals RhSi and CoSi | Ni, Zhuoliang; Zhang, Yang; Wang, Kefeng; XU, Bing; Ocaña, Óscar; Han, Xingyue; Manna, Kaustuv; Paglione, Johnpierre; Felser, Claudia; Grushin, Adolfo; De Juan, Fernando; Mele, Eugene; Wu, Liang | We find both materials show giant but non-quantized CPGE. | Session 106: Topological Materials: Chiral and Semimetals |
| 1482 | Angle-resolved photoelectron spectroscopy of chiral topological semimetals | Schröter, Niels | Here, I will present evidence from angle-resolved photoelectron spectroscopy that a family of intermetallic catalysts, including PtAl and PdGa [1,2], are chiral topological semimetals. | Session 106: Topological Materials: Chiral and Semimetals |
| 1483 | Topological Singularity Induced Chiral Kohn Anomaly in a Weyl Semimetal | Nguyen, Thanh; Li, Mingda; Han, Fei; Andrejevic, Nina; Pablo Pedro, Ricardo; Apte, Anuj; Tsurimaki, Yoichiro; Ding, Zhiwei; Zhang, Kunyan; Huang, Shengxi; Alatas, Ahmet; Alp, Esen; Chi, Songxue; Fernandez-Baca, Jaime; Matsuda, Masaaki; Tennant, David; Zhao, Yang; Xu, Zhijun; Lynn, Jeffrey | In this talk, I will describe the observation of a chiral Kohn anomaly in the Weyl semimetal tantalum phosphide using inelastic x-ray and neutron scattering, which were guided upon by theoretical calculations [1]. | Session 106: Topological Materials: Chiral and Semimetals |
| 1484 | Optical Evidence of Chiral Plasmon mode in Dirac and Weyl semimetals | Joint, Francois; Jenkins, Gregory; Hu, Chaowei; Qian, Tiema; Ni, Ni; Drew, Howard | Optical Evidence of Chiral Plasmon mode in Dirac and Weyl semimetals | Session 106: Topological Materials: Chiral and Semimetals |
| 1485 | Symmetry indicators for topological superconductors | Po, Hoi Chun | In this talk, we will discuss how this paradigm can be integrated with the notion of symmetry indicators [1]. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1486 | Field-angle dependent Majorana gap in a Kitaev spin liquid state of α-RuCl3 | Shibauchi, Takasada | In a limited range of this paramagnetic state, thermal Hall transport studies report a half-integer quantized plateau behavior [1,2], a signature of Majorana fermions whose degrees of freedom are half of electrons. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1487 | Molecular beam epitaxy of superconducting Sn1-xInxTe (0 ≤ x ≤ 0.66) 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 Sn 1-xIn xTe by molecular beam epitaxy. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1488 | TEM study of aluminum superconductor growth on the in-plane selected area semiconductor nanowire network | Korneychuk, Svetlana; Boekhout, Frenk; Tutuncuoglu, Gozde; Li, Kongyi; Aseev, Pavel; Caroff-Gaonac’h, Philippe; Kouwenhoven, Leo; Yucelen, Emrah | Here, we demonstrate how transmission electron microscopy (TEM) can assess the quality of the Al superconductor layer, in particular the orientation and size distribution of grains, interface quality and grain boundaries. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1489 | Electronic transport studies of architectures supporting Majorana fermions | Dhara, Sayandip; Mucciolo, Eduardo | Here, we develop a recursive Green’s function-based technique to study electronic transport using the realistic tight-binding models of systems holding Majorana fermions. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1490 | InSbAs two-dimensional electron gases as a platform for topological superconductivity | Moehle, Christian; Ke, Chung Ting; Thomas, Candice; Xiao, Di; Lodari, Mario; van de Kerkhof, Vincent; Termaat, Ruben; Karwal, Saurabh; Metti, Sara; Guinn, Charles; Kallaher, Raymond; Gardner, Geoffrey; Scappucci, Giordano; Manfra, Michael; Goswami, Srijit | We show that this ternary has a large Landé g-factor of ~50, along with exceptionally strong spin-orbit coupling, exceeding the value for both InSb and InAs. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1491 | Shubnikov-de Haas Oscillation in Pb1-xSnxSe topological quantum wells | Wang, Jiashu; Liu, Xinyu; Bunker, Christian; Bac, Seul-Ki; Zhukovskyi, Maksym; Orlova, Tatyana; Rouvimov, Sergei; Dobrowolska, Malgorzata; Furdyna, Jacek; Assaf, Badih | Here we investigated the MBE growth of Pb 0.92Eu 0.08Te/Pb 0.7Sn 0.3Se/ Pb 0.92Eu 0.08Te quantum well and characterized the sample by XRD, TEM and magneto-transport measurement. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1492 | First Angle-Resolved Photoemission Studies of LaNiGa2 | Staab, Matthew; Badger, Jackson; Quan, Yundi; Rossi, Antonio; Devlin, Kasey; Neubauer, Kelly; Perez, Chris; Fettinger, Jim; Klavins, Peter; Kauzlarich, Susan; Aoki, Dai; Pickett, Warren; Taufour, Valentin; Vishik, Inna | We will show the first ARPES studies on LaNiGa 2, showing 3D band dispersion and fermiology consistent with first principles calculations. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1493 | Suppressing Trivial Edge Conductance in Antimonide-based Quantum Spin Hall Materials | Nguyen, Minh; Kiselev, Andrey; Carrassco, Diego; Chen, Mary; Nguyen, Clifford; Polski, Robert; Nadj-Perge, Stevan | In this talk, we will discuss our recent results in solving this technological road block for the material system. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1494 | Boundary conditions and bound states in lateral topological insulator-based junctions | Thareja, Eklavya; Vekhter, Ilya | We derive the topological boundary conditions for the wavefunction at a lateral junction between the two, connect it with the detailed structure of both potential and magnetic scattering at the junction, and discuss the existence and the properties of the states localized near such junctions. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1495 | Effect of disorder on high-spin topological superconductor YPtBi | Saraf, Prathum; Sharma, Rahul; Roncaioli, Connor; Kim, Hyunsoo; Paglione, Johnpierre | In order to gain some further insight into the nature of the superconducting state, we report on a variety of measurements to understand the effect of disorder on the material and probe the pair breaking effect as a function of disorder on the superconducting state. | Session 107: Topological Materials: Majoranas, Superconductivity and Thin films |
| 1496 | Tunable Majorana networks based on second-order topological superconductors | Calzona, Alessio; Zhang, Songbo; Trauzettel, Bjoern | We propose a way to realize networks based on SOTSs which allow to nucleate and braid Majorana bound states (MBSs) in an all-electrical manner, without fine-tuning. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1497 | Signatures of anisotropic topological superconductivity in a dc-SQUID | Pekerten, Baris; Hawn, Benjamin; Pakizer, Joseph; Matos Abiague, Alex | We investigate the emergence of topological superconductivity (TS) in a dc-SQUID and its signatures on the ground state phase and critical current. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1498 | Majorana conductance quantization in the presence of momentum relaxation processes | Duse, Chaitrali; Sriram, Praveen; Muralidharan, Bhaskaran | In this work, we examine whether the quantized zero-bias conductance peak is robust enough to dephasing and momentum relaxation to remain a tell-tale signature of MBSs. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1499 | Competing time scales and their experimental signatures in dissipative 1D Kitaev chain | Chao, Yang; Yang, Bo | Using the Lindblad master equation formalism, we study the oscillation of Josephson current in coupled Kitaev chains with the a dissipative boundary. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1500 | Many-body Quantum Geometry in Superconductor-Quantum Dot Chains | Klees, Raffael; Cuevas, Juan Carlos; Belzig, Wolfgang; Rastelli, Gianluca | In this work we propose an experimentally feasible multiterminal setup of N quantum dots connected to N+1 superconducting leads to study nontrivial topology in terms of the many-body Chern number of the ground state. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1501 | Second Chern Number and Non-Abelian Berry Phase in Topological Superconducting Systems | Weisbrich, Hannes; Klees, Raffael; Rastelli, Gianluca; Belzig, Wolfgang | Here we show that mesoscopic superconducting systems can implement higher-dimensional topology and represent a formidable platform to study a quantum system with a purely nontrivial second Chern number [1]. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1502 | Tunable topological states hosted by unconventional superconductors with adatoms | Kreisel, Andreas; Hyart, Timo; Rosenow, Bernd | Here, we propose a realistic path for creating topological superconductivity, which is based on an unconventional superconductor with a chain of non-magnetic adatoms on its surface. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1503 | Chiral Dirac Superconductors: Second-order and Boundary-obstructed Topology | Tiwari, Apoorv; Jahin, Ammar; Wang, Yuxuan | We analyze the topological properties of a chiral p + ip superconductor for a two-dimensional metal/semimetal with four Dirac points. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1504 | Predictive Discoveries of 2D Materials for Topological Superconductivity and High-Tc Superconductivity | Zhang, Zhenyu | In this talk, I will attempt to give an overview on the recent advances and latest excitements in this vibrant area, with some of our own stories surrounding low-dimensional topological superconductors and a new class of high- T c superconductors squeezed in. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1505 | Chiral Majorana hinge modes on curved surface with magnetic impurities | Na, Ilyoun; Chirolli, Luca | We discuss possible physical realizations of higher-order odd-parity topological superconductors (TSCs) starting with a time-reversal-invariant TSC (class DIII) on a three-dimensional sphere geometry. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1506 | First-, second- and third-order topological superconductivity protected by point-group symmetries | zhang, zhongyi; Fang, Chen | We find that under the given symmetry setting of normal state and of the pairing order parameter, there is a global obstruction to achieve a fully gapped surface, which leads to helical Majorana mid-gap modes that propagate along 1-D curves or are localized at some points on the surface. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1507 | Hole-Binding in Nx2 Dice-Ladder | Soni, Rahul; Alvarez, Gonzalo; Dagotto, Elbio | In this work, we show the presence of negative binding energy for a pair of holes in this ferrimagnetic region of the Nx2 ladder. | Session 108: Topological Superconductor Materials: Modeling and Characterization Methods |
| 1508 | AMPLITUDE REPRESENTATION OF THE LANDAU-LIFSHITZ EQUATION | Li, Gang; Sun, Chen; Pokrovsky, Valery | We use a classical representation for the Landau-Lifshitz equation, the energy spectrum of magnons is studied. | Session 109: Spin Dynamics and Excitations |
| 1509 | Equations of motions for spin-1 magnets — a u(3) formalism, suitable to investigate dynamical and thermodynamical properties | Remund, Kimberly; Pohle, Rico; Akagi, Yutaka; Romhanyi, Judit; Shannon, Nicholas | [Andreev84, Barzykin91] In this talk, we extend the commonly used su(3) algebra for spin-1 moments to the u(3) Algebra [Papanicolaou88], treating dipolar and quadrupolar degrees of freedom on an equal footing, and derive equations of motion, which take a simple form and are well suited for numerical implementation. | Session 109: Spin Dynamics and Excitations |
| 1510 | Correlated Magnetic Properties in Ultra-low Damping Ferromagnetic and Heavy Metal Bilayers | Lujan, David; Lee, Aidan; Chang, Tsun Chun; Nunley, Timothy; Sobotkiewich, Kemal; Lee, Shang-Fan; Yang, Fengyuan; Li, Xiaoqin (Elaine) | Using momentum-resolved Brillouin light scattering, we investigate a series of epitaxially grown Pt (3 nm)/Co xFe 1-x bilayers that exhibit the lowest damping in metallic FMs. | Session 109: Spin Dynamics and Excitations |
| 1511 | Spin Echo Simulations and Supervised Machine Learning | Snider, Charles; Carr, Stephen; Feldman, Dmitri; Ramanathan, Chandrasekhar; Marston, Brad; Mitrovic, Vesna | Using a numerical simulation of a phenomenological model of nuclear spin-spin interaction mediated by collective electronic spin excitations, we study the effects of such an interaction on nuclear magnetic resonance spin echo experiments. | Session 109: Spin Dynamics and Excitations |
| 1512 | Magnetization dynamics of room-temperature vdWs magnet Fe5GeTe2 | Alahmed, Laith; Nepal, Bhuwan; Macy, Juan; Wei, Kaya; Zheng, Wenkai; Sapkota, Arjun; Mazza, Alessandro; Brahlek, Matthew; Jin, Wencan; Zhang, Shulei; Mewes, Claudia; Balicas, Luis; Mewes, Tim; Li, Peng | In our work, we synthesized bulk Fe 5GeTe 2 crystals and studied the magnetic properties by temperature-dependent vibrating sample magnetometry (VSM) and ferromagnetic resonance (FMR) techniques. | Session 109: Spin Dynamics and Excitations |
| 1513 | Spin-orbit exciton in a honeycomb lattice magnet CoTiO3: Revealing a link between magnetism in d- and f-electron systems | Yuan, Bo; Stone, Matthew; Shu, Guo-Jiun; Chou, Fangchang; Rao, Xin; Clancy, James; Kim, Young-June | We present inelastic neutron scattering study of the spin-orbit (SO) exciton in a single crystal sample of CoTiO 3 as a function of temperature. | Session 109: Spin Dynamics and Excitations |
| 1514 | Nonlocal Gilbert damping and magnetic interactions in noncollinear magnetic nanostructures from first principles | Brinker, Sascha; dos Santos Dias, Manuel; Lounis, Samir | Utilizing a first-principles description of the spin dynamics of noncollinear magnetic nanostructures based on linear-response time-dependent density functional theory [1], we demonstrate that the Gilbert damping and gyromagnetic tensors can be expressed in terms of couplings, chiral or not, of the magnetic moments. | Session 109: Spin Dynamics and Excitations |
| 1515 | Ultrafast Spin Dynamics in the Chiral Helimagnet Cr1/3NbS2 | Liu, Hengzhou; Trinh, Minh Tuan; Clements, Ellie; Li, Ling; Mandrus, David; Srikanth, Hariharan; Phan, Manh-Huong; Karaiskaj, Denis | Here, we present an ultrafast spin dynamics study in single crystals of chiral helimagnet Cr 1/3NbS 2 using the time-resolved magneto-optical Kerr effect technique. | Session 109: Spin Dynamics and Excitations |
| 1516 | Spin excitations in the multiferroic skyrmion host GaV4S8 | Pokharel, Ganesh; Suriya Arachchige, Hasitha; Ehlers, Georg; Do, Seunghwan; Stone, Matthew; Lumsden, Mark; Zhang, Hao; Qiu, Yiming; Fishman, Randy; Wilson, Stephen; Mandrus, David; Christianson, Andrew | A Heisenberg spin model with competing symmetric and asymmetric exchange (DM) interactions explain the experimental data. | Session 109: Spin Dynamics and Excitations |
| 1517 | Structure change across the Morin transition temperature of single crystal α-Fe2O3 | He, Jiaming; Wang, Suyin; Chen, Yu-sheng; Zhou, Jianshi | Alpha-ferric oxide (α-Fe 2O 3) has been the subject of extensive studies aiming to determine the relationship between spontaneous magnetic moments and structure. | Session 109: Spin Dynamics and Excitations |
| 1518 | Micromagnetic modeling of skyrmion and domain wall dynamics in Pt/TmIG systems | Pelekhov, Denis; Freyermuth, Jacob; Selcu, Camelia; Ahmed, Adam; Bagues Salguero, Nuria; Guo, Jason; Lee, Aidan; Lyalin, Igor; McCullian, Brendan; Wang, Binbin; Wu, Po Kuan; Hammel, P Chris; Kawakami, Roland; McComb, David; Yang, Fengyuan; Randeria, Mohit | We present investigation of skyrmion and domain wall formation and dynamics in Pt/Tm 3Fe 5O 12(TmIG) bilayers. | Session 109: Spin Dynamics and Excitations |
| 1519 | Unconventional dynamics of ferrimagnets in the vicinity of compensation points | Kim, Se Kwon | In this talk, we will discuss the recent theoretical progress on the ensuing novel dynamics of ferrimagnets. | Session 109: Spin Dynamics and Excitations |
| 1520 | Characterization of the Dynamics of FeRh using Time-Domain Thermoreflectance (TDTR) | Harton, Renee; Mason, Nadya; Cahill, David | Using Time-Domain Thermoreflectance (TDTR), a pump probe technique used to determine the thermoreflectance (TR) of samples, we studied the dynamics of FeRh. | Session 109: Spin Dynamics and Excitations |
| 1521 | Magnetism in V doped monolayer ZrS2 | Julieth, Greis; Tang, Zhao; Lopez-Candales, Gabe; Zhang, Peihong | In this work, we present density functional theory based electronic structure calculations of V doped monolayer ZrS 2. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1522 | Probing spin-polarized band structure of V-doped WSe2 | Duong, Dinh Loc; Jiang, Jinbao; Nguyen, Lan-Anh T.; DHAKAL, KRISHNA PRASAD; Lee, Young-Hee | Here, we report a giant Zeeman shift from the spin-polarized state in tungsten diselenide (WSe 2) doped with a small amount of vanadium atoms (~0.15%) by investigating resonant magnetotunneling spectroscopy of a vertical graphite/V-WSe 2/graphite heterojunction. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1523 | Probing zero-field splitting at spin-1 centers through dc magnetoresistance | McMillan, Stephen; Flatté, Michael | We extend this method to the spin-1 neutral divacancy in 4H-SiC, where measurements of zero-field splittings on the order of GHz are resolvable using applied fields in the range of 50 mT as long as the carrier occupation time at the divacancy exceeds 1 ns. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1524 | Scanning Tunneling Microscopy Studies of Fe on GaAs (110) Surface | Smith, Rebekah; Sahin, Cuneyt; Flatté, Michael; Gupta, Jay | Here we investigate the interaction of Fe adatoms with a host GaAs (110) surface using STM. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1525 | Spin relaxation in a silicon-based quantum dot qubit | Dobrovitski, Viatcheslav | In this talk we will discuss the relaxation mechanisms that govern the lifetime of a spin in the silicon quantum dot. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1526 | Spin-orbit interaction in InSb double quantum dots characterized using dispersive gate sensing | Han, Lin; Chan, Michael; De Jong, Damaz; Prosko, Christian; Li, Kongyi; Badawy, Ghada; Bakkers, Erik; Kouwenhoven, Leo; Koski, Jonne; Malinowski, Filip; Pfaff, Wolfgang | We experimentally investigate the consequences of a strong spin orbit interaction in double quantum dot defined in an InSb nanowire. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1527 | First-principles calculations of copper vacancy centers in zinc sulfide | Sahin, Cuneyt; Flatté, Michael | Here we calculate the electronic and structural properties of copper-vacancy complexes in zinc sulfide (ZnS) within the density functional theory. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1528 | Generalization of the linked cluster expansion computational method for arbitrary pulse sequences | Ouellet, Mathieu; Bassett, Danielle; Bassett, Lee | We present a diagrammatic computational approach to evaluate the central electronic spin problem in the presence of non-Markovian bath dynamics for arbitrary electron spin control sequences. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1529 | Radio-Frequency manipulation of strongly interacting electron-nuclear spin systems. | Zangara, Pablo; Pagliero, Daniela; Henshaw, Jacob; Ajoy, Ashok; Acosta, Rodolfo; Manson, Neil; Reimer, Jeffrey; Pines, Alexander; Meriles, Carlos | We use optical spin pumping of NV-hosting diamond to investigate the impact of a continuous radio-frequency (RF) drive on the generation of 13C spin polarization. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1530 | Quantum-impurity relaxometry of magnons in thin films: role of chirality | Rustagi, Avinash; Bertelli, Iacopo; van der Sar, Toeno; Upadhyaya, Pramey | Here, we present this theory highlighting the role of chirality and show that our theory 1) is in excellent quantitative agreement with recent NV-relaxometry experiments, and 2) predicts crossover between the two NV ESR relaxation rates as a key signature of the chiral coupling between the NV and magnons which is corroborated by new experiments on Nickel thin films interfaced with NV QI. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1531 | Nanoscale features of magnetic dopants in 2D systems with spin-orbit interaction | Rodrigues da Cruz, Adonai; Flatté, Michael | We present a theory of magnetic dopant in a two-dimensional electron gas model with Rashba-Bychkov and Dresselhaus spin-orbit couplings. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1532 | Spin-orbit mediated modulation of defect-phonon coupling in transition metal dichalcogenides | Chakraborty, Chitraleema; Ciccarino, Christopher; Narang, Prineha | Therefore, we present theoretical calculations and analysis of quantum defects in 2D materials. | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1533 | Electron ground state g-factor in embedded InGaAs quantum dots: An atomistic study | Kahraman, Mustafa; Bulutay, Ceyhun | We present atomistic computations within an empirical pseudopotential framework for the electron s-shell ground state g-tensor of embedded InGaAs quantum dots (QDs). | Session 110: Spin in Semiconductors for Quantum Information Science |
| 1534 | Bond dependent spin-orbital exchange and quantum order-by-disorder in CoTiO3 | McClarty, Paul | Recent theoretical work has proposed that such couplings can be significant in certain cobalt magnets where the spin-orbit coupling is sub-dominant [1]. | Session 111: Kitaev Systems |
| 1535 | Easy-plane anisotropic-exchange honeycomb magnets: quantum effects and dealing with them | Maksimov, Pavel; Chernyshev, Alexander | We attempt a study of magnetic spectrum of the easy-plane anisotropic spin model on a honeycomb lattice with bond-dependent exchange interactions, which can be related to the extended Kitaev-Heisenberg model through the axes transformation. | Session 111: Kitaev Systems |
| 1536 | Heisenberg-Kitaev models on hyperhoneycomb and stripyhoneycomb lattices: 3D–2D equivalence of ordered states and phase diagrams | Krüger, Wilhelm; Vojta, Matthias; Janssen, Lukas | To make contact with the physics of the iridates Li 2IrO 3, we analyze a minimal model including a symmetric off-diagonal Γ interaction, discuss its 3D–2D mapping, and determine the relevant phases which are realized in the materials. | Session 111: Kitaev Systems |
| 1537 | SDRG Study of Random Kitaev Chains and Ladders | Kao, Wen-Han; Perkins, Natalia | Here we present a study of random spin-1/2 chain and ladder with bond-directional Kitaev-like interactions. | Session 111: Kitaev Systems |
| 1538 | Polarized Inelastic Neutron Scattering Results on the Kitaev Spin-Liquid Candidate D3LiIr2O6 | Halloran, Thomas; Wang, Yishu; Broholm, Collin | Both polarized and unpolarized inelastic studies reveal information regarding the low energy excitations in the potential KSL state. | Session 111: Kitaev Systems |
| 1539 | Majorana-mediated spin transport in Kitaev quantum spin liquids | Minakawa, Tetsuya; Murakami, Yuta; Akihisa, Koga; Nasu, Joji | We study the spin transport through the quantum spin liquid (QSL) by investigating the real-time and real-space dynamics of the Kitaev spin system with zigzag edges using the time-dependent Majorana mean-field theory. | Session 111: Kitaev Systems |
| 1540 | Low Temperature Thermal Transport in RuCl3 | Czajka, Peter; Gao, Tong; Hirschberger, Max; Lampen-kelley, Paula; Banerjee, Arnab; Yan, Jiaqiang; Mandrus, David; Nagler, Stephen; Ong, N. Phuan | Low Temperature Thermal Transport in RuCl3 | Session 111: Kitaev Systems |
| 1541 | Raman spectroscopy evidence for dimerization and Mott collapse in α-RuCl3 under pressures | gm, Li | We perform Raman spectroscopy studies on α-RuCl 3 at room temperature to investigate its phase transitions of magnetism and structure under pressure. | Session 111: Kitaev Systems |
| 1542 | Tunneling spectroscopy of quantum spin liquids | Koenig, Elio; Randeria, Mallika; Jaeck, Berthold | We address the spectral modifications that arise in a magnetic field which is applied to drive the candidate material α-RuCl3 into a QSL phase, and we propose a lateral 1D tunnel junction as a viable setup in this regime. | Session 111: Kitaev Systems |
| 1543 | Bond directional anisotropy and Dzyaloshinskii–Moriya interaction induced meta-magnetic state in honeycomb lattice magnet Tb2Ir3Ga9 | Khan, Mojammel Alam; Fishman, Randy; Zhang, Qiang; Ye, Feng; Mitchell, John | Bond directional anisotropy and Dzyaloshinskii–Moriya interaction induced meta-magnetic state in honeycomb lattice magnet Tb2Ir3Ga9 | Session 111: Kitaev Systems |
| 1544 | Phonon dynamics of Kitaev spin liquid at finite temperatures | Feng, Kexin; Ye, Mengxing; Perkins, Natalia | Here we propose to study the signatures of the fractionalized excitations in Kitaev materials by exploiting their coupling to lattice vibrations [2]. | Session 111: Kitaev Systems |
| 1545 | Kitaev interactions in metallic bands and resulting Berry curvature distributions | Zhang, Wenjuan; Addison, Zachariah; Trivedi, Nandini | The Kitaev spin model on a honeycomb lattice with competing bond-dependent interactions describes a quantum spin liquid (QSL) with topological order and fractionalized excitations. | Session 111: Kitaev Systems |
| 1546 | Magnetic Anisotropy in Spin-3/2 with Heavy Ligand in Honeycomb Mott Insulators: Application to CrI3 | Stavropoulos, Panagiotis Peter; Liu, Xiaoyu; Kee, Hae-Young | Here we derive a microscopic spin model of S=3/2 on transition metals surrounded by heavy ligands in honeycomb Mott insulators using a strong-coupling perturbation theory. | Session 111: Kitaev Systems |
| 1547 | The Kitaev-Heisenberg-Γ Model on the Honeycomb Lattice | Zhang, Shang-Shun; Halasz, Gabor; Batista, Cristian | We obtain the low-energy excitation spectrum and the dynamical spin structure factor of the Kitaev-Heisenberg-Γ model using a novel variational approach, that becomes exact at the exactly solvable Kitaev points. | Session 111: Kitaev Systems |
| 1548 | Sign structure of thermal Hall conductivity for in-plane field polarized Kitaev magnets | Chern, Li Ern; Zhang, Emily; Kim, Yong-Baek | We demonstrate that this sign structure is a generic property of the polarized state in the presence of in-plane magnetic fields. | Session 111: Kitaev Systems |
| 1549 | Investigation of Sample Dependence in α-RuCl3 Crystals | Kim, Subin; Kim, Young-June | To investigate the sample dependence in α-RuCl3, various α-RuCl3 crystals grown using chemical vapour transport method with different conditions were characterized. | Session 111: Kitaev Systems |
| 1550 | Quantum-classical crossover in the spin-1/2 Heisenberg-Kitaev kagome magnet | Yang, Yang; Rousochatzakis, Ioannis; Perkins, Natalia | In our recent work [1], we revisit the crossover from the quantum resonating valence bond (RVB) phase to a semiclassical regime brought about by anisotropic Kitaev interactions in the spin-1/2 Heisenberg kagome antiferromagnet, and focus on the precise mechanisms underpinning this crossover. | Session 111: Kitaev Systems |
| 1551 | NMR Investigation on Honeycomb Iridate Ag3LiIr2O6 | Wang, Jiaming; Bahrami, Faranak; Yuan, Weishi; Singer, Philip; Yang, Hung-Yu; Tafti, Fazel; Imai, Takashi | We use 7Li nuclear magnetic resonance (NMR) to investigate the physical properties of two samples of Ag 3LiIr 2O 6 based on Knight shift and spin-lattice relaxation rate 1/T 1. | Session 111: Kitaev Systems |
| 1552 | Thermodynamic perspective on the field-induced behavior of \alpha-RuCl3 | Gegenwart, Philipp | Thermodynamic perspective on the field-induced behavior of \alpha-RuCl3 | Session 111: Kitaev Systems |
| 1553 | Magnetic vortex liquid and anomalous thermal Hall conductivity in frustrated magnets with bond-dependent interactions | Chern, Li Ern; Buessen, Finn; Kim, Yong-Baek | Here, considering frustrated magnets with bond-dependent interactions, which are realized in the so-called Kitaev materials, we theoretically demonstrate that a large thermal Hall conductivity can originate from a classical ground state without any magnetic order. | Session 111: Kitaev Systems |
| 1554 | Analyzing thermodynamic signatures of field-induced phase transitions in α-RuCl3 | Kaib, David; Biswas, Sananda; Riedl, Kira; Winter, Stephen; Valenti, Roser | We compare to generalized Kitaev models using exact diagonalization methods, obtaining qualitative agreement. | Session 111: Kitaev Systems |
| 1555 | Revealing the Phase Diagram of Kitaev Materials by Machine Learning | Liu, Ke; Sadoune, Nicolas; Rao, Nihal; Greitemann, Jonas; Pollet, Lode | We use an unsupervised and interpretable machine-learning method, the tensorial-kernel support vector machine (TK-SVM), to study the phase diagram of candidate models for Kitaev materials. | Session 111: Kitaev Systems |
| 1556 | Order by disorder and Kosterlitz-Thouless transitions in classical Gamma-model subject to a magnetic field | Tian, Zhongzheng; Fan, Zhijie; Saha, Preetha; Chern, Gia-Wei | We present a combined analytical and numerical study of honeycomb Gamma model subject to magnetic field in the high-symmetry direction. | Session 111: Kitaev Systems |
| 1557 | Weak-field induced nonmagnetic state in a Co-based honeycomb | Zhong, Ruidan; Gao, Tong; Ong, Nai; Cava, Robert | Here we report our studies on BaCo 2(AsO 4) 2, for which we find that the magnetic order associated with the non-Kitaev interactions can be fully suppressed by a relatively low magnetic field, yielding a non-magnetic material and implying the presence of strong magnetic frustration and weak non-Kitaev interactions. | Session 111: Kitaev Systems |
| 1558 | Strain effects in α-RuCl3 from first principles | Biswas, Sananda; Kaib, David; Riedl, Kira; Winter, Stephen; Leeb, Valentin; Knolle, Johannes; Valenti, Roser | We find that Kitaev interaction gets strongly enhanced under compression. | Session 111: Kitaev Systems |
| 1559 | Testing Topological Phase Transitions in Kitaev Materials Under In-Plane Magnetic Fields | Gordon, Jacob; Kee, Hae-Young | Material realization of the non-Abelian Kitaev spin liquid phase – an example of Ising topological order (ITO) – has been the subject of intense research in recent years. | Session 111: Kitaev Systems |
| 1560 | Nonreciprocal charge transport at magnetic topological insulator interfaces | Yasuda, Kenji; Morimoto, Takahiro; Yoshimi, Ryutaro; Mogi, Masataka; Tsukazaki, Atsushi; Kawamura, Minoru; Takahashi, Kei; Kawasaki, Masashi; Nagaosa, Naoto; Tokura, Yoshinori | In this talk, we will introduce another example of exotic transport in magnetic topological insulators: nonreciprocal charge transport, where the sample’s resistance depends on the current direction [1]. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1561 | Interfacing topological insulators and ferrimagnets: Bi2Te3 and Fe3O4 heterostructures grown by molecular beam epitaxy | Mota Pereira, Vanda; Wu, Chi-Nan; Knight, Cariad-A.; Choa, Arnold; Tjeng, Liu; Altendorf, Simone | We find the heterostructure Bi 2Te 3 on Fe 3O 4 to be a more viable approach, with transport signatures in agreement with a gap opening in the topological surface states. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1562 | Magnetic Weyl semimetal emerging from non-magnetic doping | Carnevali, Virginia; Obeysekera, Dimuthu; Supka, Andrew; Dela Cruz, Clarina; Fornari, Marco; Yang, Junjie | Here we report the enhancement of FM component induced by non-magnetic doping and the emergence of magnetic Weyl states in SrMn 1-xZn xSb 2. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1563 | High-throughput search of magnetic topological insulators and semi-metals using spin-orbit spillage and machine-learning methods | Choudhary, Kamal; Garrity, Kevin | In this work, we use a systematic high-throughput density functional theory based computational workflow to identify possible intrinsic Chern insulators and semi-metals among 40000 three-dimensional materials in the JARVIS-DFT database (https://jarvis.nist.gov/jarvisbdft). | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1564 | Charge Density Waves as a Tool to Achieve Idealized Topological Semimetals | Lei, Shiming; Teicher, Samuel; Topp, Andreas; Cai, Kehan; Lin, Jingjing; Rodolakis*, Fanny; McChesney, Jessica; Krivenkov, Maxim; Marchenko, Dmitry; Varykhalov, Andrei; Ast, Christian; Car, Roberto; Cano, Jennifer; Garcia Vergniory, Maia; Ong, Nai; Schoop, Leslie | Here we introduce a new strategy to design nearly idealized topological semimetals, by taking advantage of a charge density wave (CDW) and non-symmorphic symmetry. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1565 | Topological surface currents accessed through reversible hydrogenation of the bulk | Deng, Haiming; Zhao, Lukas; Park, Kyungwha; Yan, Jiaqiang; Sobczak, Kamil; Krusin-Elbaum, Lia | Here we report a new hydrogenation approach resolving an outstanding challenge in chalcogenide classes of topological materials — the control of intrinsic bulk conduction — using an aqueous HCl solution rich in H +. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1566 | Quasi-Periodic Bulk-Boundary Correspondence and the 1D Metal-Insulator Transition | Borgnia, Dan; Slager, Robert-Jan; Vishwanath, Ashvin | Focusing on the almost-Matthieu operator (Andre-Aubry-Harper model) and its 1D Metal-Insulator Transition (MIT), we provide a novel approach to Barry Simon’s "Dry Ten Martini" problem in the singularly continuous regime. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1567 | Disentangling the magnetic proximity effect in topological insulators with Mg(Al,Fe)2O4/Bi2Se3 thin films | Riddiford, Lauren; Grutter, Alexander; Pillsbury, Timothy; Samarth, Nitin; Suzuki, Yuri | In this talk, we have studied heterostructures of the ferromagnetic insulator Mg(Al,Fe) 2O 4 and TI Bi 2Se 3 to explore a possible magnetic proximity effect. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1568 | Effect of dilute magnetism in a topological insulator | Kabir, Firoza; Hosen, Md Mofazzel; Ding, Xiaxin; Lane, Christopher; Dhakal, Gyanendra; Liu, Yangyang; Dimitri, Klauss; Sims, Christopher; Regmi, Sabin; Persaud, Luis; Liu, Yong; Pathak, Arjun; Zhu, Jian-Xin; Gofryk, Krzysztof; Neupane, Madhab | Our study shows that Gd doped Sb 2Te 3 is a spin-orbit-induced bulk band-gap material, whose surface is characterized by a single topological surface state. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1569 | Nanoscale synthesis and characterization of heterostructures coupling antiferromagnetic MnTe and topological insulator Bi2Te3 | LaFleur, Alexander; Rachmilowitz, Bryan; Zhao, He; Ren, Zheng; Li, Hong; Sharma, Shrinkala; Alamgir Tehrani, Nastaran; Zeljkovic, Ilija | Here, we use molecular beam epitaxy (MBE) to grow MnTe films, and bilayers of MnTe and prototypical topological insulator Bi2Te3. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1570 | Scanning SQUID Microscopy of the Quantum Anomalous Hall Effect | Ferguson, George; Xiao, Run; Low, David; Zhou, Ling-Jie; Richardella, Anthony; Chang, Cui-Zu; Samarth, Nitin; Nowack, Katja | We report magnetic imaging of Cr-doped (Bi,Sb) 2Te 3 heterostructures in the quantum anomalous hall regime. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1571 | Spontaneous ferromagnetism and finite surface energy gap in the topological insulator Bi2Se3 from surface BiSe antisite defects | Nahas, Suhas; Sanyal, Biplab; Black-Schaffer, Annica | We perform ab-initio calculations on Bi Se antisite defects in the surface of Bi 2Se 3, finding strong low-energy defect resonances with spontaneous ferromagnetism, fixed to an out-of-plane orientation due to an exceptionally large magnetic anisotropy energy. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1572 | The Rabbi Limit of Current Rectification in Solids | Matsyshyn, Oles; Piazza, Francesco; Moessner, Roderich; Sodemann, Inti | Employing a combination of the Keldysh technique and Floquet theory, we show that this is an artefact of perturbation theory and that there is a well-defined periodic steady-state akin to Rabbi oscillations leading to finite rectified currents in the clean limit. | Session 112: Magnetic Topological Materials 3: Doped Bi2Te3 |
| 1573 | Complex anisotropic magnetic phase diagram of EuGa2Al2 | Allen, Kevin; Moya, Jaime; Lei, Shiming; Morosan, Emilia | In this contributing, we study such emergent competition in EuGa 2Al 2 as a function of magnetic field and temperature. | Session 113: Phase Transition and Spin Glass |
| 1574 | Finite-temperature dynamics and the role of disorder in nearly-critical Ni(Cl1-xBrx)24SC(NH2)2 | Facheris, Leonardo; Blosser, Dominic; Povarov, Kirill; Bewley, Robert; Gvasaliya, Severian; Zheludev, Andrey | Finite-temperature dynamics and the role of disorder in nearly-critical Ni(Cl1-xBrx)24SC(NH2)2 | Session 113: Phase Transition and Spin Glass |
| 1575 | 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 113: Phase Transition and Spin Glass |
| 1576 | Magnetic transition driven 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 113: Phase Transition and Spin Glass |
| 1577 | Variational wave functions for spin-phonon models | Ferrari, Francesco; Becca, Federico; Valenti, Roser | In this talk we present a variational framework for the study of spin-phonon models in which lattice distortions affect the exchange interaction between the spins. | Session 113: Phase Transition and Spin Glass |
| 1578 | Origin of Memory in Spin Glass Dynamics | Orbach, Raymond | We argue that the length scale for chaos takes place within the spin glass correlation length ξ(t w ,T). | Session 113: Phase Transition and Spin Glass |
| 1579 | Probing spin-glass dynamics with 1/f Noise | Harrison, David; Dahlberg, E. Dan; Orbach, Raymond | We provide a physical interpretation of a previously phenomenological result for this frequency dependence. | Session 113: Phase Transition and Spin Glass |
| 1580 | Field-induced quantum critical point in itinerant antiferromagnet Ti3Cu4 | Moya, Jaime; Hallas, Alannah; Huang, Chien-Lung; Loganathan, Vaideesh; Kish, Lazar; Aczel, Adam; Beare, James; Cai, Yipeng; Luke, Graeme; Weickert, Franziska; Nevidomskyy, Andriy; Malliakas, Christos; Kanatzidis, Mercouri; Morosan, Emilia; Bayliff, Kyle | We present results on singles crystals of a new antiferromagnet with no magnetic constituent elements, Ti 3Cu 4. | Session 113: Phase Transition and Spin Glass |
| 1581 | Measuring hybridized electro-nuclear modes at a quantum phase transition | Libersky, Matthew; McKenzie, Ryan; Silevitch, Daniel; Stamp, Philip; Rosenbaum, Thomas | Here, we directly measure the low energy excitation modes of a well-known realization of the quantum Ising model in transverse field, LiHoF 4, using microwave spectroscopy techniques to probe energies below what is accessible via neutron scattering. | Session 113: Phase Transition and Spin Glass |
| 1582 | Phases of quantum dimer magnets with strong spin-orbit coupling | Flynn, Michael; Baker, Thomas; Singh, Rajiv | We present a model which reproduces the essential elements of this experimental data, and shed light on the nature of the universal physics associated with the unexpected phase transition. | Session 113: Phase Transition and Spin Glass |
| 1583 | Experimental investigation into doped Fe2P compounds for magnetocaloric refrigeration | Gibson, Ethan; Frandsen, Benjamin | We compare and contrast the observed behavior in the pure and doped compounds and offer insights into how this information can guide future applications of these materials. | Session 113: Phase Transition and Spin Glass |
| 1584 | Critical properties of randomly mixed magnetic model of Ising, six-state clock, and XY spins on the square lattice | Surungan, Tasrief; Mina, Aron; Nussinov, Zohar | In the present study, we probe a new type of randomness:- that of a fluctuating number of components and/or allowed values at different lattice sites. | Session 113: Phase Transition and Spin Glass |
| 1585 | Temperature Chaos in a Spin Glass Observed using the Correlation Length as a Caliper | Zhai, Qiang; Orbach, Raymond; Schlagel, Deborah | We have developed a protocol to observe temperature chaos in a CuMn spin glass. | Session 113: Phase Transition and Spin Glass |
| 1586 | Control of direct exchange and superexchange interactions with DC electric fields | Furuya, Shunsuke; Takasan, Kazuaki; Sato, Masahiro | In this presentation, as a natural and important extension of our previous work, we discuss DC-electric-field controls of superexchange interactions of geometrically frustrated quantum spin systems that will allow for tuning the microscopic Hamiltonian without changing the composition of the compound. | Session 113: Phase Transition and Spin Glass |
| 1587 | Finite-size Scaling of O(n) Systems at the Upper Critical Dimensionality | Lv, Jian-Ping; Xu, Wanwan; Sun, Yanan; Chen, Kun; Deng, Youjin | We address the logarithmic finite-size scaling (FSS) of the O(n) symmetry at the upper critical dimensionality. | Session 113: Phase Transition and Spin Glass |
| 1588 | Stability and formation of skyrmion in ferromagnetic nanodots ~20 nm lateral dimensions with high Ms and moderate DMI | Rajib, Md Mahadi; Misba, Walid Al; Bhattacharya, Dhritiman; Atulasimha, Jayasimha | In this study, we show with micromagnetic simulation that small ferromagnetic skyrmion ~20 nm size in patterned nanostructures can be formed by increasing M s for experimentally available DMI, as opposed to following the trend of lowering M s and forming small skyrmion in ferrimagnetic racetrack/infinite films. | Session 114: Magnetic Spin Textures |
| 1589 | Extended Exchange Interactions in Cr1/3NbS2, MnBi, and VTe: What is Nature saying? | Parker, David | Here I present evidence from 3 recent theoretical studies that find evidence, generally supported by relevant experimental data, for substantial exchange interactions even at interatomic distances approaching 6 Angstroms, where one would ordinarily expect such exchange interactions to be minimal. | Session 114: Magnetic Spin Textures |
| 1590 | Antiferromagnetism of Fe1/3NbS2 as Characterized by Resonant Ultrasound Spectroscopy | Lewin, Sylvia; Perko-Engel, Gabriel; Haley, Shannon; Maniv, Eran; Analytis, James | We have used resonant ultrasound spectroscopy to further characterize the antiferromagnetism of Fe 1/3NbS 2. | Session 114: Magnetic Spin Textures |
| 1591 | Measurements of a novel magnetically induced structural phase in CoPS3 | Mai, Thuc; Garrity, Kevin; Susner, Michael; Conner, Benjamin; McCreary, Amber; McGuire, Michael; Hight Walker, Angela | In CoPS 3, a vdW material with antiferromagnetic ordering around 130 K, we perform magneto-Raman spectroscopy, magnetometry, calorimetric, and X-ray diffraction as a function temperature to reveal a new magnetically induced structural phase transition. | Session 114: Magnetic Spin Textures |
| 1592 | A general, microscopic model of B20 magnets | Hall, Kyle; Curnoe, Stephanie | In contrast to the standard continuum model used to describe these materials, we introduce a general, symmetry-invariant, microscopic model of nearest-neighbour exchange interactions constructed through group theoretical means. | Session 114: Magnetic Spin Textures |
| 1593 | Rich Phase Behaviors in Kitaev Honeycomb Magnet Na2Co2TeO6 | Chen, Wenjie; Li, Xintong; Hu, Zhenhai; Yue, Li; Sutarto, Ronny; He, Feizhou; Iida, Kazuki; Kamazawa, Kazuya; Lin, Xi; Li, Yuan | After performing a combination of spectroscopic and thermodynamic measurements on single crystals of this material, we found that Na2Co2TeO6, surprisingly, goes through several distinct phase transitions at low temperatures and in zero magnetic field. | Session 114: Magnetic Spin Textures |
| 1594 | Phonon-assisted Formation of Spin Density Wave Order in Cr Thin Film | Li, Jiaruo; Gorobtsov, Oleg; Patel, Sheena; Hua, Nelson; Gregory, Benjamin; Shabalin, Anatoly; Medapalli, Rajasekhar; Hrkac, Stjepan; Wingert, Jim; Cela, Devin; Glownia, James; Chollet, Matthieu; Zhu, Diling; Fullerton, Eric; Shpyrko, Oleg; Singer, Andrej | In this talk, we will discuss how the formation of SDW in antiferromagnetic Cr thin film after its quench by a femtosecond (fs) laser is influenced by an acoustic phonon launched by the laser. | Session 114: Magnetic Spin Textures |
| 1595 | Real-space Observation of Ferroelectrically Induced Magnetic Spin Crystal in SrRuO3 | Seddon, Samuel; Dogaru, Daniela; Holt, Sam; Rusu, Dorin; Peters, Jon; Sanchez-Fuentes, Ana; Alexe, Marin | We have constructed an SrRuO 3-PbTiO 3 (Ferromagnetic–Ferroelectric) bilayer that exhibits features in the Hall Hysteresis previously attributed to a Topological Hall Effect (THE), and Skyrmions. | Session 114: Magnetic Spin Textures |
| 1596 | Signature of defect-induced symmetry breaking in magnetic neutron scattering | Michels, Andreas | Our study proves the generic relevance of the DMI for the magnetic microstructure of defect-rich ferromagnets. | Session 114: Magnetic Spin Textures |
| 1597 | Microscopic magnetic Hamiltonian for exotic spin textures in metals | Kathyat, Deepak; Mukherjee, Arnob; Kumar, Sanjeev | We validate the spin Hamiltonian by comparing results with those on the exact spin-fermion model, and present its phase diagram using large-scale Monte Carlo simulations. | Session 114: Magnetic Spin Textures |
| 1598 | Berry-Phase Curvature and Hall Effect in Co Nanoparticles | Ullah, Ahsan; Balasubramanian, Balamurugan; Pahari, Rabindra; Skomski, Ralph; Sellmyer, David | We investigate the Berry-phase behavior of dense ensembles of Co nanoparticles using experiments and micromagnetic simulations. | Session 114: Magnetic Spin Textures |
| 1599 | Sensing chiral spin orders with entangled neutrons | Irfan, Abu Ashik Md.; Ortiz, Gerardo | We present a quantum entangled-probe scattering framework that extends van Hove’s standard scattering theory, and apply it to directly unveil chiral spin orders. | Session 114: Magnetic Spin Textures |
| 1600 | Monte Carlo studies of (T, H) phase diagram of quasi-2D skyrmion systems: Role of magnetic anisotropy | Wu, Po-Kuan; Randeria, Mohit | We present detailed MC results comparing these two cases, focusing on topological charge density, skyrmion size, and orientational order of the 2D skyrmion crystal phase. | Session 114: Magnetic Spin Textures |
| 1601 | Magnetic phase diagram of two-leg ladder iron-based systems: Exact numerical results | Sroda, Maksymilian; Dagotto, Elbio; Herbrych, Jacek | Motivated by growing experimental evidence of exotic magnetism in low-dimensional iron-based systems, we study the magnetic phases of the multi-orbital Hubbard ladder in the orbital-selective Mott phase. | Session 114: Magnetic Spin Textures |
| 1602 | Estimation of magnetic parameters from domain images with convolutional neural networks | Kong, Jian Feng; Ren, Yuhua; Chen, Xiaoye; Tey, Nicholas; Ho, Pin; Chirila, Constantin Ciprian; Ng, Nathaniel; Khoo, Khoong Hong; Soumyanarayanan, Anjan | We show that deep convolutional neural networks are able to extract magnetic parameters such as the exchange interaction, Dzyaloshinskii-Moriya interaction, and uniaxial anisotropy from images of domain configurations. | Session 114: Magnetic Spin Textures |
| 1603 | Bose-Einstein condensate of Dirac magnons | Sukhachov, Pavlo; Banerjee, Saikat; Balatsky, Alexander | We derive a phenomenological multi-component model of pumped bosons together with bosons residing at Dirac nodes and study the dynamics of the condensates. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1604 | Para-Hermitian perturbation theory and nodal lines in magnon systems | Massarelli, Geremia; Khait, Ilia; Paramekanti, Arun | We present a systematic quasidegenerate perturbation theory scheme for para-Hermitian Hamiltonians, which faithfully reproduces the spectrum of any set of neighbouring energy eigenstates order by order, regardless of possible degeneracies. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1605 | Light-induced topological magnons in two-dimensional van der Waals magnets | Vinas Boström, Emil; Claassen, Martin; McIver, James; Jotzu, Gregor; Rubio, Angel; Sentef, Michael | We show that this mechanism can stabilize topological magnon excitations in honeycomb ferromagnets and in optical lattices. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1606 | Thermal and magnetoelastic properties of α-RuCl3 in the field-induced low temperature states | Schoenemann, Rico; Imajo, Shusaku; Weickert, Franziska; Yan, Jiaqiang; Mandrus, David; Takano, Yasumasa; Brosha, Eric; Rosa, Priscila; Nagler, Stephen; Kindo, Koichi; Jaime, Marcelo | Here we discuss the implications that new magnetocaloric, thermal expansion and magnetostriction data of α-RuCl 3 single crystals have on its temperature-field phase diagram and uncover the magnetic-field dependence of an apparent energy gap Δ(H), extracted from thermal expansion measurements, that evolves when the low temperature antiferromagnetic order is suppressed. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1607 | Topological thermal Hall effect of strongly interacting bosons in a disordered quantum magnet SrCu2(BO3)2 | Suetsugu, Shota; Yokoi, Taichi; Tanaka, Ibuki; Kasahara, Yuichi; Kasahara, Shigeru; Chengchao, Zhong; Totsuka, Keisuke; Kageyama, Hiroshi; Matsuda, Yuji | Here we report high resolution κ xy measurements on SrCu 2(BO 3) 2. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1608 | Topological Weyl magnons and thermal Hall effect in layered honeycomb ferromagnets | Li, Shuyi; Nevidomskyy, Andriy | We study the topological properties and magnon Hall effect of a 3D ferromagnet in the ABC stacked honeycomb lattice, relevant to the recent inelastic neutron scattering study of CrI3 [1]. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1609 | Topological properties of magnons in Ferromagnet-Superconductor heterostructure | Parajuli, Bishal; Chien, Chih-Chun; Lin, Shi-Zeng | Here, we present topological properties of magnons in a ferromagnet-superconductor heterostructure in the presence of a magnetic field. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1610 | Chiral Hinge Magnons in Second-Order Topological Magnon Insulators | Mook, Alexander; Diaz, Sebastian; Klinovaja, Jelena; Loss, Daniel | We theoretically unveil and numerically confirm a novel ferromagnetic state in three dimensions dubbed second-order TMI, whose hallmarks are excitations at its hinges, where facets intersect. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1611 | Dirac surface states in topological crystalline magnon insulators | Kondo, Hiroki; Akagi, Yutaka | In this study, we propose magnetic models having magnon surface states with Dirac dispersion. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1612 | Spin fluctuations in quantized transport of magnetic topological insulators | Li, Yuhang; Cheng, Ran | We show that considering the exchange gaps at the mean-field level is inadequate to predict phase transitions between electronic states of distinct topology. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1613 | π-flux Dirac Triplon and Thermal Hall Effect in Shastry-Sutherland model | Sun, Hao; Yang, Bo | In this letter, we introduce a effective 2-dimer tight-binding model to reveal significant physical observable when pseudospin (two sublattices) couples the tilted external magnetic field. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1614 | Quantum Hall-like transitions in the thermal Hall behavior of multilayer topological magnon insulators | Hofer, Stephen; Datta, Trinanjan; Tewari, Sumanta; Mazumdar, Dipanjan | In this study, we show that ABC-stacked honeycomb lattice multilayers with alternating Dzyaloshinskii-Moriya interaction (DMI) reveal a rich topological magnon phase diagram. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1615 | Multifunctional Antiperovskites driven by Strong Magnetostructural Coupling | Singh, Harish Kumar; Samathrakis, Ilias; Fortunato, Nuno; Zemen, Jan; Shen, Chen; Gutfleisch, Oliver; Zhang, Hongbin | Multifunctional Antiperovskites driven by Strong Magnetostructural Coupling | Session 115: Magnetic Topological Materials 5: Magnons |
| 1616 | Magnetoelastic behaviors in holmium antimonide topological semimetal: magnetic torque studies | Poudel, Narayan; Hosen, M. Mofazzel; Islam, Zahirul; Kaczorowski, Dariusz; Neupane, Madhab; Gofryk, Krzysztof | We show that the magnetic torque exhibits large anisotropy in the antiferromagnetic phase. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1617 | Skyrmion lattice creep at ultra-low current densities | Luo, Yongkang; Lin, Shi-Zeng; Leroux, Maxime; Fobes, David; Bauer, Eric; Thompson, Joe; Janoschek, Marc; Maiorov, Boris | Here we show using resonant ultrasound spectroscopy – a probe highly sensitive to the coupling between skyrmion and atomic lattices – that in the prototypical skyrmion lattice material MnSi depinning occurs at jc that is only 4 percent of jc. | Session 115: Magnetic Topological Materials 5: Magnons |
| 1618 | Picosecond-long spin current generation along the low-symmetry axis of WTe2 | Lee, Kyusup; Chen, Mengji; Li, Jie; Cheng, Liang; Wang, Qisheng; Cai, Kaiming; Chia, Ee Min; Chang, Haixin; Yang, Hyunsoo | The temperature dependent study reveals that the CPGE vanishes at 175 K due to the carrier compensation. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1619 | Low-frequency ferromagnetic resonance in CeAlSi | Sun, Yue; Lee, Changmin; Yang, Hung-Yu; Reshetikhin, Pasha; Ajoy, Ashok; Torchinsky, Darius; Tafti, Fazel; Orenstein, Joseph | We observe a ferromagnetic resonance (FMR) in CeAlSi with a novel time-resolved magneto-optical setup, which can resolve both amplitude and direction changes of magnetization based on polarimetry. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1620 | Controlling magnetic order, magnetic anisotropy, and band topology in the semimetals Sr(Mn0.9Cu0.1)Sb2 and Sr(Mn0.9Zn0.1)Sb2 | ISLAM, FARHAN; Choudhary, Renu; Liu, Yong; Ueland, Benjamin; Paudyal, Durga; Heitmann, Thomas; McQueeney, Robert; Vaknin, David | Neutron diffraction and magnetic susceptibility studies show that orthorhombic single-crystals of the topological semimetals Sr(Mn 0.9Cu 0.1)Sb 2 and Sr(Mn 0.9Zn 0.1)Sb 2 undergo three-dimensional C-type AFM ordering at a significantly lower T N than that of the parent compound SrMnSb 2. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1621 | Phenomenology of anomalous Kerr effect in SrRuO3 thin films | Bartram, F. Michael; Sorn, Sopheak; Li, Zhuolu; Hwangbo, Kyle; Shen, Shengchun; Frontini, Felix; He, Liqun; Yu, Pu; Paramekanti, Arun; Yang, Luyi | We formulate a phenomenological theory for the unusual Kerr effect which is shown to arise from the interplay between two non-skyrmion sources: (1) magnetic domains which are naturally present during the magnetization reversal and (2) an unsual nonmonotonic relation between the Kerr angle and the magnetization. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1622 | Magneto-terahertz studies on the Kondo-Weyl Mn3+xSn1-x films | Han, Xingyue; Khadka, Durga; Thapaliya, Tilak; Huang, Sunxiang; Wu, Liang | In this work, we study the doping dependece in epitaxial Mn 3+xSn 1-x films by time domain terahertz spectroscopy under a magnetic field up to 7T. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1623 | Breaking Lorentz Reciprocity in the Weyl Semimetal Co3Sn2S2 to Enable Time-Asymmetric Photonics | Nagpal, Arun; Nenno, Dennis; Garcia, Christina; Shekhar, Chandra; Felser, Claudia; Narang, Prineha; Atwater, Harry | Here we use electromagnetic and ab initio simulations, and experimental measurements of infrared light scattering to demonstrate the breaking of Lorentz reciprocity in the ferromagnetic phase of Co 3Sn 2S 2 through calculations and measurement of nonequivalent reflection coefficients of opposing channels. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1624 | Magnetic Dipole Transitions in the Second Harmonic Generation Response of the LnAlSi (Ln = La, Ce, Pr, Nd) Series of Weyl Semimetals | Subedi, Sujan; Lu, Baozhu; Yang, Hung-Yu; Tafti, Fazel; Torchinsky, Darius | In this talk, we present evidence of strong MD transitions that occur in the non-magnetically ordered states of the LnAlSi (Ln = La, Ce, Pr, Nd) series of Weyl semimetals and we discuss this observation in the context of the physics of these materials. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1625 | Long-wavelength incommensurate spin structure in the non-centrosymmetric Weyl semimetal NdAlSi | Gaudet, Jonathan; Yang, Hung-Yu; Baidya, Santu; Lu, Baozhu; Xu, Guangyong; Zhao, Yang; Rodriguez-Rivera, Jose; Hoffmann, Christina; Graf, David; Torchinsky, Darius; Vanderbilt, David; Tafti, Fazel; Broholm, Collin | To do so, we characterized the magnetism of NdAlSi using neutron diffraction and found a ferrimagnetic state at low temperature, which is followed by a long-wavelength incommensurate order at finite temperature. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1626 | Topology and Magnetism in Monolayers and Bilayers of ReX3 (X = Br, I) | Mahatara, Sharad; Kiefer, Boris | In this contribution, we have computed electronic, magnetic and topological properties of 2D (mono- and bi-layers) of ReX 3 (X = Br, I) with density functional theory (DFT) including vdW interactions and SOC. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1627 | Machine-learning-assisted growth of ultrahigh-quality epitaxial 4d ferromagnetic Weyl semimetal SrRuO3 | Wakabayashi, Yuki; Otsuka, Takuma; Krockenberger, Yoshiharu; Sawada, Hiroshi; taniyasu, yoshitaka; Yamamoto, Hideki | State-of-the-art oxide thin film growth technologies, augmented by machine learning techniques, may allow access to such topological matter, which we have actually accomplished [2] using machine-learning-assisted molecular beam epitaxy (ML-MBE)[3]. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1628 | Observation of magnetic Weyl fermion excitation in antiferromagnetic kagome Mn3Pt thin films | Mukherjee, Joynarayan; Bandyopadhyay, Subhadeep; Dasgupta, Indra; Saha-Dasgupta, Tanusri; Raman, Karthik | Here, we report the observation of linearly dispersive Weyl nodes in strongly correlated kagome Mn 3Pt epitaxial films using magnetotransport measurements and density functional theory (DFT) calculations. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1629 | Epitaxial growth of Kagome semimetal Mn3Ge | Hong, Deshun; Liu, Changjiang; Hsiao, Haw-Wen; Zuo, Jian-Min; Liu, Haihua; Arslan, Ilke; Pearson, John; Jiang, J; Bhattacharya, Anand | This work makes tunability in topological semimetal possible and opens a pathway for both the Kagome materials related physics and devices. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1630 | The origin of complex magnetic phases in Fe based binary Fe3Ga4 compound | Afshar, Mahdi; Mazin, Igor | Based on our density functional theory calculations and a phenomenological model Hamiltonian, we try to elucidate the origin of different magnetic interactions and magnetic ordering in this compound. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1631 | Imaging the motion of individual domain walls in the magnetic Weyl semimetal Co3Sn2S2 | Lee, Changmin; Vir, Praveen; Manna, Kaustuv; Lachman, Ella; Shekhar, Chandra; Analytis, James; Felser, Claudia; Orenstein, Joseph | Here we use scanning magneto-optic Kerr microscopy to measure the motion of individual domain walls in response to oscillating magnetic fields in the frequency range from 10 Hz to 10 kHz. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1632 | Ferromagnetic Weyl semimetals and their electromagnetic response in RAlX materials class (R= Ce or Pr and X = Si or Ge) | Huang, Cheng-Yi; Singh, Bahadur; Yang, Hung-Yu; Lu, Baozhu; Bahrami, Faranak; Gaudet, Jonathan; Xu, Bochao; Franklin, Jacob; Sochnikov, Ilya; Graf, David; Xu, Guangyong; Zhao, Yang; Hoffmann, Christina; Broholm, Collin; Chiu, Wei-Chi; Huang, Shin-Ming; Wang, Baokai; Lin, Hsin; Torchinsky, Darius; Bansil, Arun; Tafti, Fazel | Here we present RAlX materials (R= Ce, Pr; X = Si, Ge) as new FMWSMs where the Weyl nodes are stabilized by breaking the inversion symmetry and their separation is controlled by breaking TRS. | Session 116: Magnetic Topological Materials 8: New Materials |
| 1633 | Growth and dissolution of crystal nuclei in poly( L-lactic acid) (PLLA) in Tammann’s development method | Andrianov, Ruslan; Androsch, René; Mukhametzyanov, Timur; Schick, Christoph | Growth and dissolution of crystal nuclei in poly( L-lactic acid) (PLLA) in Tammann’s development method | Session 117: Polymer Crystals and Crystallization |
| 1634 | Flow-Induced Crystallization of Polymers during Multi-Axial Deformation | Nie, Cui; Sheng, Junfang; Chen, Wei; Zhao, Jingyun; Yu, Wancheng; Li, Liangbin | Considering the phenomenon of frustrating SIC for natural rubber during biaxial stretching, here we proposed a new model for SIC based on the results of theoretical calculation, which decouples the free energy contributions of chain orientation from that of conformational entropy reduction. | Session 117: Polymer Crystals and Crystallization |
| 1635 | Effect of Substrate Interaction on Thermodynamics of Prefreezing | Tariq, Muhammad; Dolynchuk, Oleksandr; Thurn-Albrecht, Thomas | 1 Phenomenological theory of prefreezing 2 predicts that the transition temperature Tmax depends primarily on the difference of the interfacial energies Δ γ = γsub,melt – ( γsub,cry + γcry,melt), whereas the minimum jump of thickness lmin at Tmax is controlled by the ratio ( γsub,cry + γcry,melt)/ γsub,melt. | Session 117: Polymer Crystals and Crystallization |
| 1636 | In Situ Grazing Incidence X-Ray Scattering For Monitoring Semi-Crystalline Polymer Dissolution, Recrystallization, and Morphology Mechanisms with Solvent Vapor Treatment | Bliesner, Samuel; Parker, Tara; Albert, Julie | Herein, we apply grazing incidence X-ray scattering techniques in situ to probe the mechanisms of polymer dissolution during solvent uptake and recrystallization behavior during solvent removal aiming to understand why we observe new morphologies in semicrystalline PCL thin films. | Session 117: Polymer Crystals and Crystallization |
| 1637 | Manipulation of Minority Block Crystallization in Asymmetric PEO-b-PCL Copolymers | VanHorn, Ryan; Ashley, Alex; Tower, Cole | Manipulation of Minority Block Crystallization in Asymmetric PEO-b-PCL Copolymers | Session 117: Polymer Crystals and Crystallization |
| 1638 | Effects of phase separation and interfaces on incompatible polymer crystallization | Zhang, Wenlin; Zou, Lingyi | We apply molecular dynamics (MD) simulations to investigate the roles of phase separation and interfaces in the crystallization of incompatible polymer blends. | Session 117: Polymer Crystals and Crystallization |
| 1639 | 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 117: Polymer Crystals and Crystallization |
| 1640 | Bowls, Vases and Goblets – Polymer and Nanocomposite Morphology Revealed by Optical Tomography | Yang, Shu-gui; Wei, Zhen-zhen; Ungar, Goran; Cseh, Liliana; Zeng, Xiangbing | Here we present first such images obtained by confocal microscopy using appropriate sample preparation and image processing. | Session 117: Polymer Crystals and Crystallization |
| 1641 | Polymer Crystallization at Curved Liquid/Liquid Interface | Staub, Mark; Li, Christopher | The methods commonly employed tend to provide particles that have simple morphology of spheres or cylinders that are inherently fluidic and dynamic due to the long chain nature of macromolecules. | Session 117: Polymer Crystals and Crystallization |
| 1642 | Effect of Polymorphism on Isothermal Crystallization Kinetics of Long-Spaced Precision Polyacetals | Alamo, Rufina; Zhang, Xiaoshi; Marxsen, Stephanie; Ortmann, Patrick; Mecking, Stefan | Effect of Polymorphism on Isothermal Crystallization Kinetics of Long-Spaced Precision Polyacetals | Session 117: Polymer Crystals and Crystallization |
| 1643 | Measuring Flow-Induced Crystallization Kinetics of Polyethylene after Processing | Kearns, Kenneth; Scherzer, Justin; Fielitz, Tom; Chyasnavichyus, Marius; Monaenkova, Daria; Moore, Jonathan; Nicholson, David; Andreev, Marat; Rutledge, Gregory | Here we will describe development of a new methodology whereby the effect of flow on crystallization kinetics in polyethylene can be determined after an article is formed. | Session 117: Polymer Crystals and Crystallization |
| 1644 | Thickness and Crystallinity Dependent Swelling of Poly(ethylene oxide)/Poly(methyl methacrylate) Blend Films | Wang, Shiping; Albert, Julie; Vogt, Bryan | In this study, we probed the amorphous phase of thin film immiscible blends of poly(methyl methacrylate) (PMMA) and semi-crystalline poly(ethylene oxide) (PEO) and investigated how blend composition and film thickness influence film swelling under methyl ethyl ketone (MEK) vapor atmosphere. | Session 117: Polymer Crystals and Crystallization |
| 1645 | Evaluation The Hydrogen Bonding in Stereocomplex Poly(lactic acid) by Terahertz Spectroscopy | Hirata, Junya | Here, we report on the terahertz spectroscopic investigation of the hydrogen bond formation between the two enantiomeric molecular chains in the stereocomplex (sc) PLA [1]. | Session 117: Polymer Crystals and Crystallization |
| 1646 | Crystallization of molecular bottlebrush crystallization: symmetry breaking via polymer chain overcrowding | Li, Christopher; Qi, Hao; Wilk, Jeffrey; Staub, Mark; Zhao, Bin | In this talk, we discuss the crystallization behavior of crystalline molecular bottlebrush (mBB) polymers. | Session 117: Polymer Crystals and Crystallization |
| 1647 | Flow Induced Crystallization: Insights from Molecular Simulation | Rutledge, Gregory; Nicholson, David; Yi, Peng | 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 117: Polymer Crystals and Crystallization |
| 1648 | Simulation Study of Crystallization and Glass Transition of Polymers Interacting with the Square-Well Potential | Herranz, Miguel; Karayiannis, Nikos; Foteinopoulou, Katerina; Laso, Manuel | We employ Monte Carlo simulations [1] to study the phase behavior of linear, freely jointed chains whose spherical monomers interact through the square well potential [2]. | Session 117: Polymer Crystals and Crystallization |
| 1649 | GPU-accelerated Wang-Landau Simulation of Polymer Crystallization | Kawak, Pierre; Banks, Dakota; Tree, Douglas | We will discuss the challenges with this approach and our recent progress. | Session 117: Polymer Crystals and Crystallization |
| 1650 | Long term evolution of morphology, melting, and crystal-crystal transitions facilitated by dynamic bond exchange in ethylene dynamic networks | Soman, Bhaskar; Evans, Christopher | Long term evolution of morphology, melting, and crystal-crystal transitions facilitated by dynamic bond exchange in ethylene dynamic networks | Session 117: Polymer Crystals and Crystallization |
| 1651 | Crystallization Kinetics of Polyamide 66 Blends | Zhang, Xiaoshi; Mendis, Gamini; Buzinkai, John; Rhodes, Alicya | Crystallization Kinetics of Polyamide 66 Blends | Session 117: Polymer Crystals and Crystallization |
| 1652 | 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 lmin at Tmax. | Session 117: Polymer Crystals and Crystallization |
| 1653 | Molecular Dynamics, Phase Transition, and Structural Organization in Configurationally and Conformationally Disordered Polymer Crystal | Kafle, Navin; Miyoshi, Toshikazu | We report a new class of structural disorder, “ configurational disorder coupled with conformational flexibility ( CDCF)” in polymer crystal. | Session 117: Polymer Crystals and Crystallization |
| 1654 | Unlayered–Layered Crystal Transition in Long-Spaced Aliphatic Polyesters | Marxsen, Stephanie; Häußler, Manuel; Mecking, Stefan; Alamo, Rufina | We report the first known instance where layered crystal formation is bypassed by rapid quenching. | Session 117: Polymer Crystals and Crystallization |
| 1655 | Cold Crystallization in Poly(lactic acid) (PLA) Induced by Various Forms of Pre-deformation | Smith, Travis; Wang, Shi-Qing | In a prior publication 1 we have shown how brittle PLA can be made ductile by uniaxial melt extension and resistant to heat well above its T g of 60 oC. | Session 117: Polymer Crystals and Crystallization |
| 1656 | Paradigm in the growth kinetic theories of lamellar polymer crystals | Hu, Wenbing | Paradigm in the growth kinetic theories of lamellar polymer crystals | Session 117: Polymer Crystals and Crystallization |
| 1657 | Evaporation and deposition of perovskite multisolvent nanoinks | Jeong, Woojun; OH, GUN; Kim, Hyo Eun; Weon, Byung Mook | To understand complexity in evaporation and deposition of perovskite multisolvent nanoinks, we suggest a new physical model that quite well works in perovskite multisolvent nanoinks. | Session 117: Polymer Crystals and Crystallization |
| 1658 | Entropy Driven Ostwald’s Stage Rule and Ripening in Polymer Crystallization | Laso, Manuel; Herranz, Miguel; Benito, Javier; Foteinopoulou, Katerina; Karayiannis, Nikos | We present results on the spontaneous crystallization of a very extensive system (54 chains of 1000 hard sphere monomers) by means of a suite of Monte Carlo (MC) moves. | Session 117: Polymer Crystals and Crystallization |
| 1659 | Identifying the bottlenecks for heat transport in metal-organic frameworks | Wieser, Sandro; Kamencek, Tomas; Dürholt, Johannes; Schmid, Rochus; Bedoya-Martínez, Natalia; Zojer, Egbert | Metal-organic frameworks (MOFs) represent a highly porous type of materials formed by metal nodes connected by organic linkers. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1660 | Boltzmann equation modeling of thin-film quasiballistic phonon transport from a cylindrical electron beam heat source | Wehmeyer, Geoff | Electron beams with sub-10 nm diameters can be used as nanoscale heaters or thermometers, enabling new techniques to probe heat transfer in nanostructures. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1661 | Nanoscale Thermal Transport in Hybrid Materials and across Interfaces | Tian, Zhiting | In this talk, I will present my research group’s efforts to uncover nanoscale thermal transport mechanisms in hybrid organic-inorganic materials and across interfaces, using atomic modeling and experimental measurements. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1662 | Measuring Kapitza resistance versus interfacial properties at sub-Kelvin temperatures | Smith, Nathaniel; Lu, Zexi; Chaka, Anne; Bunker, Raymond | Measuring Kapitza resistance versus interfacial properties at sub-Kelvin temperatures | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1663 | Thermal boundary conductance of buckled group IV,V, and III-V two-dimensional materials | Foss, Cameron; Aksamija, Zlatan | Here we use first-principles calculations and phonon interface transport modeling to calculate the TBC of beyond-graphene 2D materials, such as; silicene, germanene, BAs, and blue and black phosphorene, on amorphous and crystalline substrates. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1664 | Phase-controlled Thermal Transport in Mesoscopic Superconducting Structures and Nanoscale Devices | 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 118: Phonons and Thermal Transport at the Nanoscale |
| 1665 | Nanotube mechanical resonators – tiny electron forces and few quanta of vibrations | Bachtold, Adrian | In this talk, I will discuss our efforts to cool the amplitude of the thermal vibrations to a few quanta [1]. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1666 | Nanoscale Vibrational Mapping of Single SiGe Quantum Dots in the Electron Microscope | Gadre, Chaitanya; Yan, Xingxu; Song, Qichen; Li, Jie; Guo, Lei; Aoki, Toshihiro; Lee, Sheng-Wei; Chen, Gang; Wu, Ruqian; Pan, Xiaoqing | Here we demonstrate the two-dimensional nanoscale vibrational mapping of a single SiGe quantum dot (QD) using an atom-sized probe in the electron microscope. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1667 | Generation and Detection of Coherent GHz Surface Phonons in Superlattices | Li, Changxiu; Chigarev, Nikolay; Thréard, Théo; Zhang, Kedong; Husiev, Artem; Niepceron, Frederick; Tournat, Vincent; Raetz, Samuel; Lu, Hong; Gusev, Vitalyi | We suggest to engineer unconventional transducers based on cleaved nanostructured bulk materials to address this issue [1]. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1668 | Superlattice as a phonon trap in zincblende quantum wells | Wang, Hua; Borunda, Mario; Mullen, Kieran | We build a realistic model of a Type II quantum well superlattice and calculate its phonon structure. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1669 | Phonon coherence in GaN/InN Superlattices | Bedoya, Natalia; Spitaler, Tobias; Hammer, René | We use molecular dynamics simulations to estimate the phonon coherence length in GaN/InN SLs of different layer thicknesses to investigate this effect. | Session 118: Phonons and Thermal Transport at the Nanoscale |
| 1670 | Chemistry under high 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 119: Matter in Extreme Environments: Novel Chemistry |
| 1671 | Structure of amorphous non-molecular CS2 at high pressure – experiment and simulation | Yan, Jinwey; Tóth, Ondrej; Xu, Wan; Liu, Xiao-Di; Gregoryanz, Eugene; Dalladay-Simpson, Philip; Santoro, Mario; Gorelli, Federico; Martonak, Roman | Here we show, combining new Raman, IR and XRD data for pressures up to 40 GPa with ab initio and machine-learned potential simulations, that the structure of BBP is different. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1672 | Electronic Structure and Superconductivity of Compressed Metal Tetrahydrides | Bi, Tiange; Zurek, Eva | Herein, we analyze the bonding and electronic structures of these phases as a function of the metal atom, and determine the factors important for superconductivity. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1673 | Superconductivity in sodalite-like yttrium hydride clathrates | Heil, Christoph; di Cataldo, Simone; Bachelet, Giovanni; Boeri, Lilia | Motivated by the discovery of near-room-temperature superconductivity in the sodalite-like clathrate hydride LaH10, we report ab initio calculations of the superconducting properties of two closely related hydrides YH6 and YH10 [1], for which an even higher Tc has been predicted. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1674 | Quantum Crystal Structure in the 250 K Superconducting Lanthanum Hydride | Errea, Ion | Here we show that quantum atomic fluctuations stabilize in this pressure range a high-symmetry Fm-3m crystal structure consistent with experiments. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1675 | Crystal Structure and Reflectivity of Laser Ramp-Compressed Sodium | Polsin, Danae; Collins, Gilbert; Gong, Xuchen; Crandall, Linda; Paul, Reetam; Huff, Margaret; Rygg, James; Burns, Stephen; Zurek, Eva; Wang, Xiaoyu; Eggert, Jon; Jenei, Amy; McMahon, Malcolm | We show the highest-pressure solid x-ray diffraction and reflectivity data on Na to date. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1676 | 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 119: Matter in Extreme Environments: Novel Chemistry |
| 1677 | The Van Der Waals Radii at High Pressure and the Atoms-Under-Pressure Database | Rahm, Martin; Ångqvist, Mattias; Rahm, J.; Erhart, Paul; Cammi, Roberto | We describe a quantum mechanical model for calculating van der Waals radii of non-reactively compressed atoms. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1678 | Theoretical Prediction of Superhard Materials with the XtalOpt Evolutionary Algorithm | Wang, Xiaoyu; Zurek, Eva; Proserpio, Davide | The XtalOpt evolutionary algorithm for crystal structure prediction has been extended to enable the prediction of materials with specific properties. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1679 | Shared structural motifs and bonding in new families of boron structures found via XtalOpt evolutionary algorithm | Hilleke, Katerina; Zurek, Eva | In an attempt to clarify potential metastable structural adaptations of boron at high pressures, crystal structure searches were performed at 100 GPa using the XtalOpt evolutionary algorithm. | Session 119: Matter in Extreme Environments: Novel Chemistry |
| 1680 | Defect Chemistry and Dopability of Telluride Diamond-Like Semiconductors and Ordered Vacancy Compounds for Thermoelectric Applications | Gomes, Lidia; Qu, Jiaxing; Adamczyk, Jesse; Toberer, Eric; Ertekin, Elif | We consider the I BIIITe 2 with I B=(Cu,Ag), III=(In,Ga) and Cu 2(Zn,Cd,Hg)(Si,Ge,Sn)Te 4 material space, and use first-principles methods and experimental phase boundary mapping to comprehensively assess dopabilities in this search space. | Session 120: Thermal and Electronic Properties |
| 1681 | How do defects limit the ultrahigh thermal conductivity of BAs? A first principles study | Fava, Mauro; Protik, Nakib; Li, Chunhua; Ravichandran, Navaneetha Krishnan; Carrete, Jesus; van Roekeghem, Ambroise; Madsen, Georg; Mingo, Natalio; Broido, David | Using first principles calculations, we determine the thermal conductivity reduction induced by different group IV impurities in BAs as a function of concentration and charge state. | Session 120: Thermal and Electronic Properties |
| 1682 | Effect of Stress-Strain Profile on Bulk Thermal Conductivity | Gunay, Ahmet; Shiomi, Junichiro | After obtaining the mechanical properties, we perform laser flash analysis and differential scanning calorimetry to obtain the bulk thermal conductivity of the samples. | Session 120: Thermal and Electronic Properties |
| 1683 | Far-infrared studies 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 concentrations. | Session 120: Thermal and Electronic Properties |
| 1684 | Adiabatic and nonadiabatic contributions to the cross section for carrier capture by defects in semiconductors | Li, Guanzhi; Yu, Yue; Nichols, Laura; O’Hara, Andrew; Barmparis, Georgios; Pantelides, Sokrates; Zhang, Xiaoguang | Here we report the development of a faster and more accurate time-domain integration method for calculations of capture cross sections that are converged with respect to the number of phonon modes. | Session 120: Thermal and Electronic Properties |
| 1685 | Piezoresistance in nano-silicon | Rowe, Alistair; Arscott, Steve; McCallum, Jeffrey; Johnson, Brett; Lew, Christopher; Li, Heng; Thayil, Abel; Filoche, Marcel | Piezoresistance in nano-silicon | Session 120: Thermal and Electronic Properties |
| 1686 | Band Structure Modifications of Ag2Se by Sulfur: A Density Functional Theory Study | Makeev, Maxim; Sahu, Ayaskanta; Rajput, Nav Nidhi | In this work, the band-structure analysis of crystalline Ag 2Se with and without substitutional sulfur atoms is performed using density functional theory. | Session 120: Thermal and Electronic Properties |
| 1687 | Anomalous Hopping Conduction Discovered in N-Type a-Si | Western, Brianna; Harcrow, Michael; Syllaios, Athanasios; Lopes, Vincent; Littler, Christopher | This work presents measurements of dark conductivity in amorphous silicon doped with high amounts of phosphine ([PH 3]/[SiH 4] = 0.01 – 0.03) and grown with argon dilution that have yielded an anomalous hopping conduction mechanism: ln σ ∝ 1/T p where p ≈ 0.75, determined by Resistance Curve Derivative Analysis. | Session 120: Thermal and Electronic Properties |
| 1688 | Anomalous Hopping and Multi-Phonon Hopping Charge Transport in Amorphous Silicon-Germanium Alloy Thin Films | Stolik Valor, Lis; Eslamisaray, Mohammad; Kakalios, James | We describe studies that find that the electronic mobility gap model traditionally employed to describe charge transport in a-Si:H is not the best description for a-Si xGe 1-x:H alloys. | Session 120: Thermal and Electronic Properties |
| 1689 | Formation and Diffusion of Charged and Neural Defect States in Crystalline GeSe for Synaptic Electronics | Bursi, Luca; Chouhan, Rajiv K.; Catellani, Alessandra; Calzolari, Arrigo | Here by means of state-of-the-art high-throughput simulations workflows for first principles condensed matter simulations, as implemented in the AiiDA infrastructure for the Quantum ESPRESSO, we study charged and neural defect states in GeSe chalcogenide with particular attention to their formation energies and diffusion barriers. | Session 120: Thermal and Electronic Properties |
| 1690 | Scanning Tunneling Spectroscopy of Cubic Boron Arsenide Single Crystals | Lee, Hwijong; Gamage, Geethal Amila; Lyons, John; Tian, Fei; Smith, Brandon; Glaser, Evan; Ren, Zhifeng; Shi, Li | Here, we report scanning tunneling spectroscopy (STS) measurements of the electronic structures of as-grown and in situ cleaved BAs single crystal surfaces. | Session 120: Thermal and Electronic Properties |
| 1691 | Copper Defects and Charge Collection in Cadmium Telluride Photovoltaic Devices | Walker, Trumann; Nietzold, Tara; Mohan-Kumar, Niranjana; Stückelberger, Michael; Colegrove, Eric; Lai, Barry; Bertoni, Mariana | Here, we use synchrotron X-ray microscopy to probe the nanoscale distribution of Cu and correlate it to local charge collection in CdTe photovoltaic devices. | Session 120: Thermal and Electronic Properties |
| 1692 | Electronic and magnetic properties of pristine and lanthanide element doped yttrium iron garnet | KC, Santosh; Paudyal, Durga | Using first-principles electronic structure calculations, we investigate these properties in yttrium iron garnet (YIG). | Session 120: Thermal and Electronic Properties |
| 1693 | Intertwined Topological and Magnetic Orders in Atomically Thin Chern Insulator MnBi2Te4 | Ovchinnikov, Dmitry; Huang, Xiong; Lin, Zhong; Fei, Zaiyao; Cai, Jiaqi; Song, Tiancheng; He, Minhao; Jiang, Qianni; Wang, Chong; Li, Hao; Wang, Yayu; Wu, Yang; Xiao, Di; Chu, Jiun-Haw; Yan, Jiaqiang; Chang, Cui-Zu; Cui, Yongtao; Xu, Xiaodong | In this work by combination of magnetic circular dichroism, transport, and microwave impedance measurements (MIM) we investigate connection between bulk electronic structure, topological order, and magnetic states in thin flakes of MnBi 2Te 4. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1694 | Quantum Oscillations in the Field-Induced Ferromagnetic State of MnBi2-xSbxTe4 | Jiang, Qianni; Wang, Chong; Malinowski, Paul; Liu, Zhaoyu; Shi, Yue; Lin, Zhong; Fei, Zaiyao; Song, Tiancheng; Graf, David; Chikara, Shalinee; Xu, Xiaodong; Yan, Jiaqiang; Xiao, Di; Chu, Jiun-Haw | Here, we present Shubnikov–de Haas oscillations of MnBi 2-xSb xTe 4 in a wide range of Sb concentrations close to the charge neutrality point (0.33 ≤ x ≤ 1.21) in the FM state. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1695 | Ferromagnetic MnSb2Te4: A p-type topological insulator with magnetic gap closing at high Curie temperatures of 45-50 K | Rader, Oliver; Wimmer, S.; Sánchez-Barriga, J.; Küppers, P.; Ney, A.; Schierle, Enrico; Freyse, F.; Caha, O.; Michalicka, J.; Liebmann, M.; Primetzhofer, D.; Hoffmann, M.; Ernst, A.; Otrokov, Mikhail; Bihlmayer, Gustav; Weschke, Eugen; Lake, Bella; Chulkov, Eugene; Morgenstern, Markus; Bauer, Guenther; Springholz, G. | We identify the influences of structural and magnetic disorder that render MnSb 2Te 4 the ideal system for tuning electric and magnetic properties of quantum anomalous Hall systems. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1696 | Coexistence of a Gapless Topological State and Surface Ferromagnetism in MnBi2Te4 | Nevola, Daniel; Li, Haoxiang; Yan, Jiaqiang; Moore, Robert; Lee, Ho Nyung; Miao, Hu; Johnson, Peter | We use both static and time resolved ARPES to show that bulk magnetism does extend to the surface of MnBi 2Te 4. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1697 | Absence of Correlation Between Carrier Type and Magnetic Properties of MnBi2Te4 | Koller, Kerrie; Bac, Seul-Ki; Liu, Xinyu; Riney, Logan; Wang, Jiashu; Powers, William; Zhukovskyi, Maksym; Orlova, Tatyana; Dobrowolska, Malgorzata; Furdyna, Jacek; Assaf, Badih | Here we investigate the magnetic properties of MnBi 2Te 4 samples with n-type and p-type carriers grown by molecular beam epitaxy. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1698 | Neutron diffraction study of magnetism in van der Waals layered MnBi2nTe3n+1 | DING, LEI; Hu, Chaowei; Feng, Erxi; Chi, Miaofang; Ni, Ni; Cao, Huibo | We present a systematic investigation of the crystal structure and magnetism of MnBi 2nTe 3n+1 (n = 1, 2, 3, 4) which have been recently found to be intrinsic magnetic topological insulators. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1699 | Giant photogalvanic effect and second-harmonic generation in magnetic axion insulators | Fei, Ruixiang; Song, Wenshen; Yang, Li | 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 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1700 | Magnetic structure evolution of 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 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1701 | Switching on ferromagnetic coupling by Mn/Sb antisite disorder in Mn(Bi1-xSbx)4Te7 | Hu, Chaowei; Mackey, Scott; Ni, Ni | We present a continuous control of the interlayer magnetic coupling in the newly-discovered intrinsic topological insulator MnBi 4Te 7 by Sb-doping. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1702 | Strongly Gapped Topological Surface States in MnBi2Te4(Bi2Te3)n Family | Gordon, Kyle; Hu, Chaowei; Sun, Hongyi; Linn, Garrison; Berggren, Bryan; 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 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1703 | Magnetic topological properties of MnBi2Te4 tuned by electric coupling | Luo, Wei; Du, Maohua; Reboredo, Fernando; Yoon, Mina | We propose a mechanism to control its electronic, magnetic and topological properties by electric field. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1704 | Electronic structure and magnetic properties of MnBi2Te4 and MnSb2Te4 | Lee, Yongbin; McQueeney, Robert; Ke, Liqin | Using ab initio methods and atomic spin dynamics, we investigate the electronic structure and magnetism in MnBi 2Te 4 and MnSb 2Te 4. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1705 | Coupling of topology and magnetic ordering in Axion Insulator and Weyl semimetal phases of MnB2X4 (A = Sb, Bi; X = Se, Te) | Chowdhury, Sugata; Garrity, Kevin; McCreary, Amber; Hight Walker, Angela; Tavazza, Francesca | We find that the direction of magnetic moment and the magnetic properties depend on the choice of chalcogenide, while the choice of B atom modifies the amount of band inversion. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1706 | Experimental evidence of the field-induced Weyl state in Mn(Bi1-xSbx)2Te4 | Lee, Seng Huat; Graf, David; Zhu, Yanglin; Yi, Hemian; Ciocys, Samuel; Choi, Eun Sang; Basnet, Rabindra; Fereidouni, Arash; Wegner, Aaron; Zhao, Yifan; Min, Lujin; Verlinde, Katrina; He, Jingyang; Redwing, Ronald; Gopalan, Venkatraman; Churchill, Hugh; Lanzara, Alessandra; SAMARTH, NITIN; Chang, Cui-Zu; Mao, Zhiqiang | In this talk, we report the experimental evidence of the field-induced Weyl state in Mn(Bi 1-xSb x) 2Te 4 6. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1707 | Analytical solution to the surface states of antiferromagnetic topological insulator MnBi2Te4 | Sun, Hai-Peng; Wang, Chunming; Zhang, Songbo; Chen, Rui; Lu, Haizhou; Xie, X. C. | To address this issue, we analytically derive an effective model for the 2D surface states by starting from a 3D Hamiltonian for bulk MnBi 2Te 4 and taking into account the spatial profile of the bulk magnetization. | Session 121: Magnetic Topological Materials 2:Mn-Bi-Te |
| 1708 | Insulating and superconducting states of monolayer WTe2 | Cobden, David | I will summarize the experimental evidence for some of these phenomena. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1709 | Supercurrent and band-inversion in bilayer graphene/WSe2 Josephson junctions | Rout, Prasanna; Papadopoulos, Nikos; Watanabe, Kenji; Taniguchi, Takashi; Goswami, Srijit | Here, we investigate the supercurrent in WSe 2/BLG/ WSe 2 Josephson junctions close to band-inverted regime by dual gate tuning of carrier density and displacement field (D). | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1710 | Two dimensional 2M-WS2 nanolayers for superconductivity | Samarawickrama, Piumi; Dulal, Rabindra; Fu, Zhuangen; Erugu, Uppalaiah; Wang, Wenyong; Ackerman, John; Leonard, Brian; Tang, Jinke; Chien, Te-Yu; Tian, Jifa | Here, we report a new route to grow high-quality 2M-WS 2 single crystals and the observation of superconductivity in its thin layers. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1711 | Link between superconductivity and a Lifshitz transition in intercalated BiSe | Sandik, Shay; Silber, Itai; Almoalem, Avior; Ribak, Amit; Nitzav, Yuval; Kuntsevich, Alexander; Sobolevskiy, Oleg; Selivanov, Yuriy; Prudkoglyad, Valerii; Dagan, Yoram; Kanigel, Amit | Here we study the electronic structure of Sr-intercalated Bi 2Se 3 using angle resolved photoemission spectroscopy (ARPES) and Shubnikov-de Haas (SdH) oscillations. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1712 | Identifying Topological Superconductivity in the 2D Transition Metal Dichalcogenides | Lane, Christopher; Zhu, Jian-Xin | To address this challenge, we search for and identify topological superconductivity (TS) in the 2D transition metal dichalcogenides (TMD). | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1713 | Quanum Hall – superconductor hybrid devices | Seredinski, Andrew; Zhao, Lingfei; Arnault, Ethan; Bondarev, Alexey; Draelos, Anne; Larson, Trevyn; Wei, Ming Tso; Taniguchi, Takashi; Watanabe, Kenji; Amet, Francois; Baranger, Harold; Finkelstein, Gleb | This talk covers our two recent results: 1) realization of the quantum Hall-based SQUID in side-gated samples and 2) observation of the chiral Andreev edge states – hybrid electron/hole single particle modes propagating along the superconductor – quantum Hall interfaces. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1714 | Superconductivity and Proximity Effect in Topological Insulator/Graphene/Gallium Heterostructures | Li, Cequn; Vera, Alexander; Zhao, Yifan; Bowen, Timothy; Yi, Hemian; Chang, Cui-Zu; Robinson, Joshua; Zhu, Jun | In this work, we report on the superconducting properties of two-layer Ga using four-terminal transport and tunneling spectroscopy. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1715 | Magic angles and topology in twisted nodal superconductors | Volkov, Pavel; Pixley, Jed; Wilson, Justin | We propose twisted bilayers of two-dimensional nodal superconductors as a new platform to realize topological and correlated superconducting phases. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1716 | Observation of topological electronic structure in quasi-1D superconductor TaSe3 | Liu, Zhongkai; Chen, Cheng; Liang, Aiji; Liu, Shuai; Nie, Si-Min; Huang, Junwei; Wang, Meixiao; Li, Yiwei; Pei, Ding; Yang, Haifeng; Zheng, Hui-Jun; zhang, yong; Lu, Donghui; Hashimoto, Makoto; Barinov, Alexei; Jozwiak, Chris; Bostwick, Aaron; Rotenberg, Eli; Kou, Xufeng; Yang, Lexian; Guo, Yanfeng; Wang, Zhijun; Yuan, Hongtao; Chen, Yulin | Here, by carrying out synchrotron and laser based angle-resolved photoemission spectroscopy (ARPES), we systematically investigated the electronic structure of a quasi-1D superconductor TaSe 3, and identified the nontrivial topological surface states. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1717 | Dome-shaped superconducting behavior of Weyl semimetal Mo0.50W0.50Te2 under pressure | Dahal, Rabin; Deng, Liangzi; Poudel, Narayan; Gooch, Melissa; Wu, Zheng; Chu, Paul C. W. | Dome-shaped superconducting behavior of Weyl semimetal Mo0.50W0.50Te2 under pressure | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1718 | Chiral Electron-Hole Hybridized Edge Modes: Interference in Transport Along a Graphene-Superconductor Interface | Bondarev, Alexey; Baranger, Harold | We study chiral transport in junctions coupling the integer quantum Hall state of graphene nanoribbons with an s-wave superconductor. | Session 122: Topological Superconductivity: 2D Materials and Heterostructures |
| 1719 | Computational dielectric relaxation spectroscopy applied to the dilute solution to solvate ionic liquid transition | France-Lanord, Arthur; Lopez, Jeffrey; Burke, Benjamin; Shao-Horn, Yang; Grossman, Jeffrey | We cover a wide range of salt concentrations, which allows us to investigate the transition from a dilute solution to a solvate ionic liquid of such a mixture. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1720 | Finite size effects and ion-ion correlations in electrolyte systems | Shao, Yunqi; Zhang, Chao | In the present study we explored the finite size effect on the transport properties under periodic boundary conditions. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1721 | Ion Correlation and Collective Dynamics in Organic Electrolytes and Ionic Liquid Mixtures: From Dilute Solutions to the Ionic Liquid Limit | Son, Chang Yun; Jeong, Seungwon; 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 LiBF 4 and LiTFSI salts. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1722 | Spectral denoising for accelerated analysis of correlated ionic transport | Molinari, Nicola; Xie, Yu; Leifer, Ian; Marcolongo, Aris; Kornbluth, Mordechai; Kozinsky, Boris | We propose a new general method for analyzing and calculating diffusivity and ionic conductivity in media with strong ionic correlations. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1723 | Transport of room-temperature ionic liquids in nanopores under external electric fields | Jiang, Xikai | Physical insights provided in this study demonstrate the importance of solvent-free nature and strong ion–ion correlations in RTILs on their nonequilibrium transport in nanopores. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1724 | Separating the effects of Tg and solvent polarity in polymer electrolytes | Gudla, Harish; Zhang, Chao; Brandell, Daniel | By separating the effect of T g and the effect of solvent polarity in our molecular dynamics simulations, we show that the maximum in the diffusion coefficient of Li+ with respect to the dielectric constant of polymer-solvent εp is due to transitions in the transport mechanism. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1725 | Field-dependent ionic conductivities from nonequilibrium molecular dynamics simulations | Lesnicki, Dominika; Rotenberg, Benjamin; Limmer, David; Gao, Chloe | [1-5] We develop a formalism and a numerical approach to efficiently compute the electric field dependent conductivity of electrolytes. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1726 | Ion clustering and its impact on correlated transport and voltage stability in electrolytes | 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 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1727 | Salt Activity Coefficients, Chain Statistics, and Scattering Behaviors in Polymer Electrolytes | Wang, Rui; Fang, Chao; Loo, Whitney | We report the molecular dynamics studies of the mixtures of Poly(ethylene oxide) (PEO) and lithium bis(trifluoromethane) imidate (LiTFSI) in experimentally relevant salt concentration regime. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1728 | From atomistic understanding of correlation and transport to electrolyte design | Molinari, Nicola; Mailoa, Jonathan; Kozinsky, Boris | We adopt theoretical and molecular modeling techniques to shine light on transport properties and correlation effects in the electrolyte system. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1729 | Anharmonic phonons, superionic diffusion, and ultralow thermal conductivity in argyrodite Cu7PSe6 | Gupta, Mayanak; Ding, Jingxuan; Bansal, Dipanshu; Abernathy, Douglas; Ehlers, Georg; Osti, Naresh; Zierau, Wolfgang; Delaire, Olivier | We present a combined experimental and theoretical investigation of atomic dynamics in the superionic compound Cu 7PSe 6, rationalizing the atomistic diffusion mechanism and the impact of host lattice dynamics. | Session 123: Physics and Effects on Transport of Ion-Ion Correlation in Electrolyte Materials |
| 1730 | Anisotropic-exchange magnets: triangular and other cases | 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 124: Triangular Systems |
| 1731 | Constraining the parameter space of triangular lattice compound YbZnGaO4 | Steinhardt, William; Dissanayake, Sachith; Maksimov, Pavel; Shi, Zhenzhong; Baral, Raju; Butch, Nicholas; Graf, David; Podlesnyak, Andrey; Liu, Yaohua; Neuefeind, Joerg; Zhao, Yang; Xu, Guangyong; Lynn, Jeffrey; Marjerrison, Casey; Frandsen, Benjamin; Chernyshev, Alexander; Haravifard, Sara | In this talk we discuss further advances in determining the parameter space of YbZnGaO4, using a wide range of experimental techniques and comparisons to theory. | Session 124: Triangular Systems |
| 1732 | Neutron scattering investigation of proposed Kosterlitz-Thouless transitions in the triangular-lattice Ising antiferromagnet TmMgGaO4 | Dun, Zhiling; Daum, Marcus; Baral, Raju; Fischer, Henry; Cao, Huibo; Liu, Yaohua; Stone, Matthew; Rodriguez-Rivera, Jose; Choi, Eun Sang; Huang, Qing; Zhou, Haidong; Mourigal, Martin; Frandsen, Benjamin | Around 4 K, magnetic pair distribution function analysis provides evidence for the vortex anti-vortex pairs that characterize the proposed Kosterlitz-Thouless phase. | Session 124: Triangular Systems |
| 1733 | The investigation of frustrated magnetism in the triangular lattice ARESe2 single crystals | Xing, Jie; Sanjeewa, Liurukara; Taddei, Keith; Fishman, Randy; Daum, Marcus; Mourigal, Martin; Kim, Jungsoo; Stewart, Gregory; Du, Mao-Hua; Reboredo, Fernando; Dela Cruz, Clarina; Parker, David; Sales, Brian; Sefat, Athena | The investigation of frustrated magnetism in the triangular lattice ARESe2 single crystals | Session 124: Triangular Systems |
| 1734 | Crystal Growth and Characterization of Tb-Based Triangular Lattice Borate | Ennis, Matthew; Bag, Rabindranath; Dissanayake, Sachith; Shi, Zhenzhong; Kolesnikov, Alexander; Butch, Nicholas; Xu, Guangyong; Brown, Craig; Haravifard, Sara | In this talk, we will present the latest results of our experimental efforts obtained for Tb-based triangular lattice compound, Ba3Tb(BO3)3. | Session 124: Triangular Systems |
| 1735 | Avoided quasiparticle decay and highly-structured excitation continuum in the spin-1/2 near-Heisenberg triangular antiferromagnet Ba3CoSb2O9 | Macdougal, David; Williams, Stephanie; Prabhakaran, Dharmalingam; Bewley, Robert; Voneshen, David; Coldea, Radu | We report single-crystal time-of-flight inelastic neutron scattering measurements of the magnetic excitations in the pseudospin-1/2 triangular-lattice near-Heisenberg antiferromagnet Ba 3CoSb 2O 9. | Session 124: Triangular Systems |
| 1736 | Evolution of magnetic-field-induced magnetic ordering in the layered structure quantum Heisenberg triangular-lattice antiferromagnet Ba3CoSb2O9 | Fortune, Nathanael; Huang, Qing; Hong, Tao; Takano, Yasumasa; Hannahs, Scott; Choi, Eun Sang; Ma, Jie; Zhao, Zhiying; Li, N.; Zhou, Haidong | We have used specific heat, neutron diffraction, thermal conductivity, and magnetic torque measurements to map out the phase diagram of this system as a function of magnetic field intensity and orientation relative to the crystallographic ab plane. | Session 124: Triangular Systems |
| 1737 | Observation of high order multi-magnon (n = 4 and 6) bound states in the frustrated triangular antiferromagnetic lattice FeI2 | Legros, Anaelle; Zhang, Shang-Shun; Bai, Xiaojian; Zhang, Hao; Batista, Cristian; Mourigal, Martin; Armitage, Peter | Here we study the frustrated spin-1 triangular antiferromagnetic lattice FeI 2 [2] using time-domain terahertz spectroscopy. | Session 124: Triangular Systems |
| 1738 | Effects of dislocations in triangular antiferromagnet NiGa2S4 | Wang, Haoyu; Tchernyshyov, Oleg | We propose a different scenario based on a simple observation: the geometrical frustration of NiGa2S4 can be relieved by a lattice distortion similar to the case of the pyrochlore antiferromagnet [3]. | Session 124: Triangular Systems |
| 1739 | Magnetic excitations affected by spin-lattice coupling in the S=3/2 triangular lattice antiferromagnet Ag2CrO2 | Matsuda, Masaaki; Dissanayake, Sachith; Yoshida, Hiroyuki; Isobe, Masaaki; Stone, Matthew | The magnetic excitations below T N were reproduced reasonably well using a linear spin-wave model with further-neighbor interactions and easy-axis anisotropy, which are predicted to be due to a previously proposed spin-lattice coupling [2]. | Session 124: Triangular Systems |
| 1740 | Muon investigations of magnetsm in the frustrated material LiYbO2. | Kenney, Eric; Bordelon, Mitchell; Posthuma, Lorenzo; Wilson, Stephen; Graf, Michael | We performed µSR measurements and show that near 1 Kelvin the system transitions from a non-magnetic state to a strongly magnetic disordered state consistent with the unusual incommensurate order suggested by neutron diffraction. | Session 124: Triangular Systems |
| 1741 | Crystal Growth and Characterization of Yb – Based Triangular Lattice Borate | Bag, Rabindranath; Ennis, Matthew; Dissanayake, Sachith; Shi, Zhenzhong; Kolesnikov, Alexander; Rodriguez-Rivera, Jose; Wu, Hui; Brown, Craig; Haravifard, Sara | In this talk, I will share our latest experimental results. | Session 124: Triangular Systems |
| 1742 | High-field resonant torsion magnetometry as a probe of CEF Interactions and exchange in frustrated triangular lattice CsYbSe2 | Pocs, Christopher; Xing, Jie; Sefat, Athena; Lee, Minhyea | Our analysis of the high-field magnetotropic response of CsYbSe 2, across a wide range of temperatures, provides an unambiguous determination of the crystal-electric-field parameters as well as leading order exchange interactions in CsYbSe 2. | Session 124: Triangular Systems |
| 1743 | Direct Imaging of Orbitals in Quantum Materials: ground state and excited states | Tjeng, Liu; Leedahl, Brett; Amorese, Andrea; Sundermann, Martin; Yavas, Hasan; Gretarsson, Hlynur; Severing, Andrea; Haverkort, Maurits | Recently we have developed a new experimental method that can make a direct image of the ground state d-orbitals in transition metal compounds [1,2]. | Session 125: New Probes of Correlated Oxides |
| 1744 | Acoustic Magnon hybridized with Orbital on Multiferroics Ba2MnGe2O7 | Hasegawa, Shunsuke; Hayashida, Shohei; Asai, Shinichiro; Matsuura, Masato; Masuda, Takatsugu | Here we demonstrate that the acoustic magnon in multiferroics Ba 2MnGe 2O 7 [1-3] is hybridized with orbitals by measuring the temperature variations of magnetization curves and neutron scattering spectra. | Session 125: New Probes of Correlated Oxides |
| 1745 | Imaging the impact of atomic-scale disorder and temperature fluctuations on antiferromagnetic ordering in iridates | Zeljkovic, Ilija | We use spin-polarized scanning tunneling microscopy (SP-STM) to visualize spin-resolved modulations arising from the antiferromagnetic (AF) order in doped Mott insulators Sr 2IrO 4 and Sr 3Ir 2O 7. | Session 125: New Probes of Correlated Oxides |
| 1746 | Onset of two-dimensional Stoner magnetism in cobalt arsenides | Ueland, Benjamin; Li, Bing; Pakhira, Santanu; Sapkota, Aashish; Nediadath Sathyanadhan, Sangeetha; Perring, Toby; Johnston, David; McQueeney, Robert | We find diffuse spin fluctuations giving rise to walls of magnetic scattering with similar anisotropy to that found for x = 0, however, the fluctuating moment is extremely weak. | Session 125: New Probes of Correlated Oxides |
| 1747 | Strong fluctuations and itinerant magnetic frustration in a multiorbital model for SrCo2As2 | Nedic, Ana-Marija; Christensen, Morten Holm; Lee, Yongbin; Fernandes, Rafael; McQueeney, Robert; Ke, Liqin; Orth, Peter | To understand these puzzling observations, we investigate a realistic interacting multi-orbital model for SrCo2As2 that takes both Co d-orbitals and As p-orbitals into account. | Session 125: New Probes of Correlated Oxides |
| 1748 | Coherent spin dynamic of strongly correlated defects in spin chains. | Bertaina, Sylvain; Soriano, Loic; zeisner, julian; kataev, Vladislav; Vezin, Hervé; Fourmigué, Marc; Orio, Maylis | We propose a new paradigm: a non-magnetic defect, like a break in the translational symmetry of Heisenberg’s spin chain, polarized many spins around it. | Session 125: New Probes of Correlated Oxides |
| 1749 | Ultrafast Mid Infrared Pump-Optical Kerr Probe of Correlated Mott-Hubbard Antiferromagnets | Ali, Mustafa G; Kaj, Kelson; Ramaprasad, Varun; Zhang, Gufeng; Chen, Xiang; Seifert, Urban; Zhang, Jingdi; Cremin, Kevin; Balents, Leon; Wilson, Stephen; Averitt, Richard | We utilize intense ultrafast mid-infrared (mid-IR) circularly polarized pump pulses to preferentially excite spin degrees of freedom through coherent two-magnon excitation as measured via the magneto-optic Kerr effect using 800 nm pulses. | Session 125: New Probes of Correlated Oxides |
| 1750 | Time-Domain THz studies of antiferromagnetic Bi2CuO4 | Bhandia, Rishi; Berry, Tanya; Phelan, William; McQueen, Tyrel; Armitage, Peter | We present the results of time-domain THz studies of single crystals of Bi2CuO4 grown via the traveling solvent technique in a laser floating zone furnace . | Session 125: New Probes of Correlated Oxides |
| 1751 | High-resolution AC Calorimetry Measurement of Honeycomb magnet Na2Co2TeO6 | Hu, Zhenhai; Li, Yuan; Lin, Xi | We find an unexpected small heat-capacity peak at low temperature and in zero magnetic field. | Session 125: New Probes of Correlated Oxides |
| 1752 | Magnetoelastic standing waves induced in UO2 by microsecond magnetic field pulses | Jaime, Marcelo; Schoenemann, Rico; Rodriguez, George; Rickel, Dwight; Balakirev, Fedor; McDonald, Ross; Evans, Jordan; Maiorov, Boris; Paillard, Charles; Bellaiche, Laurent; Salamon, Myron; Gofryk, Krzysztof | We performed magnetoelastic measurements of the piezomagnetic antiferromagnet UO 2 via the Fiber Bragg Grating method in pulsed magnetic fields up to 150 T generated by a single-turn coil setup. | Session 125: New Probes of Correlated Oxides |
| 1753 | High-resolution angle-resolved photomission study of CeSb2 | Wang, Xiaoxiao; Chen, Xiaoyang; Fang, Yifei; Jin, Xiaobo; Xu, Haichao; Peng, Rui; Feng, Donglai | Here, we performed the angular-resolved photomission spectroscopy (ARPES) of CeSb 2 and obtained the 3D electronic structure of CeSb 2 for the first time by applying the changeable photon energy. | Session 125: New Probes of Correlated Oxides |
| 1754 | Coherent X-ray Scattering at Ultrafast Timescales | Turner, Joshua | In this talk, I will describe recent results on the measurement of fluctuations in a skyrmion system, complex magnetic textures which are slated to be the next technological breakthrough in computer and sensor technology. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1755 | Exploring photoinduced transitions and lattice dynamics in strongly correlated systems | Zhu, Yimei | Combining accurate measurements of photoinduced lattice distortions via structural refinement and DFT calculations we reveal in the photoinduced transient state how the gap is closed in the presence of strong spin-orbit coupling and the origins of the two timescales of the relaxation dynamics. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1756 | Far-Subwavelength Spatial Resolution Using Relative Motion and Structured Illumination | Raghuram, Vivek; Hastings, Ryan; Webb, Kevin J. | We describe an approach for achieving far-subwavelength resolution that uses relative motion between an object and a structured coherent background field. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1757 | Probing Free Carrier Plasmons in Doped Semiconductors using Spatially Resolved Electron Energy Loss Spectroscopy | Yang, Hongbin; Garfunkel, Eric; Batson, Philip | Here, we demonstrate the possibility of measuring free carrier plasmons in a spatially resolved way by kV electrons. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1758 | Membrane-based calorimetry with Coulomb blockade thermometry | Cole, Mari; Topping, Craig; Gauss, Andreas; Kuehn, Maximilian; Reindl, Thomas; Waizmann, Ulrike; Weis, J.; Rost, Andreas | Nanofabrication techniques were used to fabricate Al/AlO 3/Al tunnel junctions on SiN membranes. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1759 | Nanoscale quantum sensing of quantum materials through a single spin magnetometer | Du, Chunhui | Exploiting this cutting-edge quantum sensing platform, we demonstrate non-invasive measurement of spin transport and dynamic properties of magnetic insulators. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1760 | Ultrafast long-range energy transport via light-matter coupling in organic semiconductors | Pandya, Raj; Rao, Akshay | Here, we show this can be achieved at room temperature in a range of chemically diverse, organic semiconductor thin films through strong light-matter coupling to form exciton-polaritons, despite the absence of an external cavity. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1761 | Search of phase transitions using a helical cavity susceptometer | Lapa, Pavel; Kassabian, George; Vargas, Nicolas; Schuller, Ivan | We designed and built an inexpensive apparatus which enables detecting PTs of different types: normal-superconductor, metal-insulator, para-ferromagnet. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1762 | X-ray Transient Absorption Studies of Exciton Self-Trapping | Turner, Nathan; Mance, Jason; Adams, Bernhard; Zhang, Xiaoyi; Attenkofer, Klaus; Dexheimer, Susan | We present optical pump / X-ray probe studies to probe changes in electronic distribution and local structure upon formation of a self-trapped exciton. | Session 126: Tools for Exploring Materials Physics at the Frontier of Time and Length Scales |
| 1763 | New material platform for superconducting transmon qubits with coherence times exceeding 0.3 milliseconds | Houck, Andrew | We will present a materials-based approach to reliably reproduce long coherence times by using tantalum-based devices, and present detailed characterization of devices to understand remaining sources of decoherence. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1764 | A density-functional theory study of the Al/AlOx/Al tunnel junction | Kim, Changeun; Ray, Keith; Lordi, Vincenzo | Our ab-initio atomistic analysis presents an approach to predict the performance of superconducting quantum tunnel junction and assess novel materials. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1765 | Cooperative Photon Emission from Indistinguishable Quantum Dots in Free Space | Koong, ZheXian; Scerri, Eleanor; Santana, Ted; Cygorek, Moritz; Ma, Yong; Park, Suk-In; Song, Jin Dong; Gauger, Erik; Gerardot, Brian | By measuring photon correlations with Hanbury-Brown and Twiss and Hong-Ou-Mandel interferometers, we fully map the quantum optical signatures of super-radiant photon emission for resonant driving and incoherent pumping as a function of detuning. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1766 | Traveling Wave Parametric Amplification without Dispersion Engineering | Kow, Chung; Brown, Tristan; Podolskiy, Viktor; Kamal, Archana | Here we propose a new system that can realize large broadband gain without employing any dispersion engineering. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1767 | Robust Performance of Superconducting Nanowire Single Photon Detectors under High Magnetic Fields | Marvinney, Claire; Pai, Yun-Yi; Lerner, Brian; Feldman, Matthew; Zhang, Jie; Miller, Aaron; Lawrie, Benjamin | Here, we explore the magnetic field dependence of amorphous SNSPDs, determining they are robust up to ±6T with a negligible dark count rate and unchanged quantum efficiency at operation bias currents. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1768 | Control of spin relaxation in GaAs nanowires with electric bias and nanowires aspect ratio | You, ChanJu (Zoe); Castelletto, Stefania; Isakovic, Abdel F. | We modeled these spectra using a modified spectral response function, and we propose this secondary peak appears due to a transition between two modes of spin transport within nanowires. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1769 | Modulation Doping of Template-Defined InGaAs Nanowires | Cerveny, Kristopher; Friedl, Martin; Samani, Mohammad; Dede, Didem; Huang, Chunyi; Lauhon, Lincoln; Zumbuhl, Dominik; Fontcuberta i Morral, Anna | Here, we report recent results on InGaAs nanowires with remote doping in the GaAs nanomembrane template grown via molecular beam epitaxy in a selective area growth approach [2]. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1770 | The impact of using palladium gates for silicon quantum dot fabrication: defect densities and strain | Stein, Ryan; Stewart, Michael | Here, we present measurements of oxide defect densities (fixed charge and interface trap density) as a function of forming gas anneal temperature for three different gate metals: Al, Ti/Pd, and Ti/Pt. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1771 | Creation of dark exciton states in a semiconductor quantum dot by a light field with a strong longitudinal component | Quinteiro, Guillermo; Reiter, Doris; Holtkemper, Matthias; Kuhn, Tilmann | Here we predict the formation of ground-state dark excitons in QDs excited by light having a strong longitudinal component, e. g. a radially polarized beam. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1772 | Closing the loop on valley splitting in 28Si/SiGe: atom probe tomography, tightbinding, and cryomultiplexing | Paquelet Wuetz, Brian; Losert, Merritt; Koelling, Sebastian; Zwerver, Anne-Marije; Stehouwer, Lucas; Samkharadze, Nodar; Philips, Stephan; Madzik, Mateusz; Zheng, Guoji; Xue, Xiao; Amitonov, Sergei; Lodari, Mario; Sammak, Amir; Coppersmith, Susan; Vandersypen, Lieven; Moutanabbir, Oussama; Friesen, Mark; Scappucci, Giordano | Here we study 28Si/SiGe heterostructures with varying roughness of the critical Si/SiGe interfaces to understand the energy splitting of the lowest lying conduction valleys (valley splitting). | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1773 | Gate-defined quantum dots in monolayer and bilayer WSe2: Part I, Fabrication | Stacy, Jeb; Davari Dolatabadi, Shiva; Mercado, Alejandro; Tull, Jeremy; Basnet, Rabindra; Pandey, Krishna; Nabi, Md Rafique Un; Watanabe, Kenji; Taniguchi, Takashi; Hu, Jin; Churchill, Hugh | In this presentation, we discuss design considerations and implementations for the fabrication of ~100 nm diameter gate-defined, p-type quantum dots in monolayer and bilayer WSe 2. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1774 | Gate-defined quantum dots in monolayer and bilayer WSe2: Part II, Measurement | Davari Dolatabadi, Shiva; Stacy, Jeb; Mercado, Alejandro; Tull, Jeremy; Basnet, Rabindra; Pandey, Krishna; Nabi, Md Rafique Un; Watanabe, Kenji; Taniguchi, Takashi; Hu, Jin; Churchill, Hugh | We have observed the Coulomb blockade effects at temperatures as low as 30 mK in our p-type quantum dots where we were able to estimate the gate-tunable size of the quantum dot. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1775 | Improvement in Superconducting Resonator Quality Factor Through Surface Passivation | Berk, Cassidy; Banerjee, Archan; HAJR, AHMED; Kreikebaum, John Mark; Altoe, Virginia; Santiago, David; Ogletree, D. Frank; Siddiqi, Irfan | In this study, we characterize the effect of these loss mechanisms for Nb co-planar resonators with and without a TiN capping layer by correlating materials analysis (XPS,TEM) and low temperature electrical measurements. | Session 127: Materials for Quantum Information Science-2 (Superconducting and Semiconducting Materials) |
| 1776 | First-Principles Theory for Understanding Excitons in Stacked Organic Assemblies | Sharifzadeh, Sahar | Here, we utilize first-principles theory to investigate the excitonic properties of stacks of functionalized PTCDI DNA base surrogates as a model system to study inter- and intra-molecular interactions. | Session 128: Organic Electronics |
| 1777 | Porous, aligned polymer films for improved organic electrochemical transistors | Flagg, Lucas; DeLongchamp, Dean; Richter, Lee | We study the role of porosity and molecular order on the performance of poly(3-hexylthiophene-2,5-diyl) (P3HT) based organic electrochemical transistors (OECTs). | Session 128: Organic Electronics |
| 1778 | Directing Organic Semiconductor Crystal Orientation and Shape using Nanoconfining Scaffolds | Alaei, Aida; Zong, Kai; Asawa, Kaustubh; Chou, Tseng-Ming; Briseño, Alejandro L.; Choi, Chang-Hwan; Lee, Stephanie S. | Here we demonstrate a method to dictate crystal orientation by (mis)matching the crystal dimensionality with the geometry of the nanoconfining scaffolds. | Session 128: Organic Electronics |
| 1779 | Phase Separation Dynamics in an Annealed Polymer:Fullerene Blend Analyzed using the Critical Point Model of the Permittivity | Shikler, Rafi; Hai, Netaniel | In this work we show for the first time how spectroscopic ellipsometry can be used to analyze the dynamics of morphological changes that take place during the annealing of a film of two bench-mark materials used for organic solar cells that are the most reported on in the literature, poly(3-hexyl-thiophene 2.5-diyl) (P3HT) and [6,6] phenyl C61 Butyric acid methyl ester (PCBM). | Session 128: Organic Electronics |
| 1780 | Marangoni-Coupled Alignment in a Semiconductor-Elastomer Blend for Stretchable Electronics | Dudenas, Peter; Gann, Eliot; Richter, Lee; DeLongchamp, Dean | Here, we report on a long-wavelength Marangoni instability in the coating process that leads to significant variation in the local semiconducting polymer fibril alignment. | Session 128: Organic Electronics |
| 1781 | The Impact of Illumination on the Photoluminescence and Depth Profile of MEH-PPV/dPS Thin Films | Moncada, Joshua; Terlier, Tanguy; Ivanov, Ilia; Verduzco, Rafael; Dadmun, Mark | This study examines the changes in photoluminescence and film structure due to white light exposure during annealing of conjugated polymer blend thin films. | Session 128: Organic Electronics |
| 1782 | Relationship between Charge-transfer State Electroluminescence and the Degradation of Organic Photovoltaics | Arneson, Claire; Huang, Xinjing; Huang, Xiaheng; Fan, Dejiu; Li, Yongxi; Gao, Mengyuan; Ye, Long; Ade, Harald; Forrest, Stephen | We modify this theory by distinguishing between electroluminescent external quantum efficiency and external charge transfer emission efficiency, and use it to quantify the degradation of archetype vacuum- and solution-processed devices. | Session 128: Organic Electronics |
| 1783 | Resonant Tender X-ray Diffraction for Disclosing the Molecular Packing of Paracrystalline Conjugated Polymer Films | McNeill, Christopher; Freychet, Guillaume; Gann, Eliot; Jiao, Xuechen; Thomsen, Lars; Feng, Guitao; Li, Weiwei | In this presentation it will be shown that resonant diffraction (also known as anomalous diffraction) is able to provide new molecular packing information about conjugated polymer films. | Session 128: Organic Electronics |
| 1784 | Impact of the primary structure of organic semiconductors on amorphous topology and crystal morphology | Snyder, Chad | In this presentation, we show how much of the above can be influenced and quantified through the primary structure of the organic semiconductors, i.e., molar mass, molar mass distribution, and comonomers/defects. | Session 128: Organic Electronics |
| 1785 | Morphology-performance Correlation in Near-Infrared Organic Solar Cells with Efficiency Exceeding 9% | Alqahtani, Obaid; Collins, Brian; Grabner, Devin; Murcia, Victor; Kan, Zhipping; Xu, Tongle; Duan, Tainan | Here, we utilized X-ray techniques to probe their morphology. | Session 128: Organic Electronics |
| 1786 | Real-time analysis of mixed ion and electron transfer in a conjugated polymer during the doping and de-doping | THAKUR, RATUL MITRA; Easley, Alexandra; Wang, Shaoyang; Zhang, Yiren; Ober, Christopher; Lutkenhaus, Jodie | In this talk, the mechanism of mixed ion-electron transfer studied using electrochemical quartz crystal microbalance with dissipation monitoring is discussed. | Session 128: Organic Electronics |
| 1787 | Multiscale approach to compute donor-acceptor interchain couplings for realistic interfacial geometries | Agarwala, Puja; Milner, Scott; Gomez, Enrique | In this way, we obtain the histogram of interchain couplings, which exhibit a long tail of rare but strong couplings above 100 meV. | Session 128: Organic Electronics |
| 1788 | Field-Induced Spectral Shift in Organic Charge-Transfer State Luminescence | Concannon, Nolan; Holmes, Russell | Here we employ excited states formed across electron donor-acceptor heterojunctions, called charge-transfer (CT) states, as a field-responsive electro-optical medium. | Session 128: Organic Electronics |
| 1789 | Understanding organic materials formation using in situ transient absorption spectroscopy | Wong, Cathy | In this work, a single-shot transient absorption spectroscopy technique is used that can measure transient spectra with up to a 60 ps pump-probe time delay in mere seconds. | Session 128: Organic Electronics |
| 1790 | Effect of dipole orientational order on charge transfer exciton states in a donor-acceptor single crystal | Macdonald, Josh; Piana, Giacomo; Comin, Massimiliano; Von Hauff, Elizabeth; Kociok-Köhn, Gabriele; Bowen, Chris; Lagoudakis, Pavlos; D’Avino, Gabriele; Da Como, Enrico | We find that the absorption band consists of three separate CT exciton states in the disordered phase – a novel finding in donor-acceptor co-crystals. | Session 128: Organic Electronics |
| 1791 | Dynamics of Triplet-Triplet Formation Versus Yield of Free Triplets in Intramolecular Singlet Fission | Chesler, Moshe; Khan, Souratosh; Mazumdar, Sumitendra | We report many-body calculations of excited states, including TT, in 2 hypothetical phenylene-linked anthracene dimers. | Session 128: Organic Electronics |
| 1792 | Universal Dependence of Carrier Mobility on Polymer Chain Length in n-Type Semiconducting Polymers | Tran, Duyen; Robitaille, Amélie; Hai, I Jo; Chiu, Yu-Cheng; Leclerc, Mario; Jenekhe, Samson | Universal Dependence of Carrier Mobility on Polymer Chain Length in n-Type Semiconducting Polymers | Session 128: Organic Electronics |
| 1793 | Effects of concentration on charge trapping in polymer electrets with aryl-amine donors. | Plunkett, Evan; Zhang, Qingyang; Katz, Howard; Reich, Daniel | We use aryl-amines in thin film polystyrene dielectrics to modify electron and hole trap states and densities. | Session 128: Organic Electronics |
| 1794 | Model for the Electro-mechanical Behavior of Elastic Organic Transistors | Reynolds, Veronica; Oh, Saejin; Xie, Renxuan; Chabinyc, Michael | We describe the application of mechanical models of the elasticity of polymers to predict the electrical characteristics of elastic TFTs. | Session 128: Organic Electronics |
| 1795 | Steady-State and Transient Behavior of Ionic Liquid Crystal Elastomers Based Organic Electrochemical Transistors | Rajapaksha, Chathuranga Prageeth; Paudel, Pushpa; Kodikara, P M Sineth; Dahal, Drona; Feng, Chenrun; Kaphle, Vikash; Lussem, Bjorn; Jakli, Antal | Here, we report a novel flexible OECT based on iLCE solid electrolyte. | Session 128: Organic Electronics |
| 1796 | Self-Healable Ultra-Stretchable Organic Electronics for Wearable Strain Sensors | Wujcik, Evan; Lu, Yang; Jeon, Ju-Won | Self-Healable Ultra-Stretchable Organic Electronics for Wearable Strain Sensors | Session 128: Organic Electronics |
| 1797 | Spin-triplet exciton impact on electrical devices | Bittle, Emily; Engmann, Sebastian; Richter, Lee; Gundlach, David; Hallani, Rawad; Holland, Emma; Anthony, John | In this talk, we present results which show singlet fission and triplet fusion processes though the observation of MEL and MPC signals from organic light emitting diodes and organic transistors. | Session 128: Organic Electronics |
| 1798 | 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 128: Organic Electronics |
| 1799 | Effects of Lateral Ion Currents in Organic Electrochemical Transistors | Paudel, Pushpa; Kaphle, Vikash; Dahal, Drona; Radha Krishnan, Raj Kishen; Lussem, Bjorn | We discuss the experimental results with the help of simulation results using 2D model [1] correctly accounting for lateral drift and diffusion of ions inside polymer channel, resulting in a better understanding of the working mechanisms of OECTs in general and more specifically a better understanding of the scaling laws of this new technology [2]. | Session 128: Organic Electronics |
| 1800 | Spin-polarised current manipulation of Bloch points | Beg, Marijan; Lang, Martin; Fangohr, Hans | In this work, using micromagnetic simulations, we explore if those magnetisation states can be manipulated using spin-polarised currents. | Session 129: Spin and Heat Transports |
| 1801 | Dynamic nuclear spin polarization by the Edelstein effect at Bi(111) surfaces | Jiang, Zijian; Soghomonian, Victoria; Heremans, Jean | Dynamic nuclear spin polarization by the Edelstein effect at Bi(111) surfaces | Session 129: Spin and Heat Transports |
| 1802 | Enhancement of nuclear spin-spin interactions by collective electronic modes | Carr, Stephen; Barrett, Eric; Snider, Charles; Feldman, Dmitri; Ramanathan, Chandrasekhar; Marston, Brad; Mitrovic, Vesna | We propose how electronic phases can also introduce feedback loops to nuclear spin behavior. | Session 129: Spin and Heat Transports |
| 1803 | Angular momentum and pseudo angular momentum in magnetic materials | Streib, Simon | Based on Noether’s theorem, I demonstrate that the recently discussed orbital angular momenta of phonons [1,2] and magnons [3,4] are pseudo angular momenta. | Session 129: Spin and Heat Transports |
| 1804 | Measurement of Phonon Angular Momentum via the Einstein-de Haas Effect, Fiber-Optic Interferometry, and a High-Q Oscillator | Sadam, Akhil; Dwyer, Matthew; Shoemaker, Devan; Passement, Raul; Hussain, Syed; Markert, John | We report initial design and use of capacitive and fiber-optic-interferometer systems to measure the predicted [1] macroscopic phonon angular momentum. | Session 129: Spin and Heat Transports |
| 1805 | Effects of CoFe Alloy Composition on Non-Electronic Thermal Transport | Mohan, Ramya; Ortiz, Victor; Zhao, Ji-Cheng; Coh, Sinisa; Wilson, Richard | In this talk, I investigate the effect of composition on thermal transport. | Session 129: Spin and Heat Transports |
| 1806 | Anomalous heat and spin transport induced by in-plane DM interaction in magnetic insulators | Park, Sungjoon; Nagaosa, Naoto; Yang, Bohm-Jung | We discuss anomalous heat and spin transport induced by in-plane Dzyaloshinskii-Moriya interaction (DMI) in two-dimensional magnetic insulators with collinear out-of-plane magnetic order. | Session 129: Spin and Heat Transports |
| 1807 | Interplay of Magnetism and Phonons in Ultrafast Dynamics of Magnetic Topological Insulator MnBi2Te4 | Kim, Peter; Poore, Maxwell; Padmanabhan, Hari; Stoica, Vladimir; Lee, Seng Huat; Mao, Zhiqiang; Gopalan, Venkatraman; Averitt, Richard | We investigate the ultrafast dynamics of the antiferromagnetic topological insulator MnBi 2Te 4 using a combination of high-sensitivity transient reflectivity and time-resolved magneto-optical measurements. | Session 129: Spin and Heat Transports |
| 1808 | Influence of Thermal Noise on the Frequency Resolution of a Sweep-Tuned Spectrum Analyzer | Elphick, Peter; Louis, Steven; Tyberkevych, Vasyl; Slavin, Andrei | Influence of Thermal Noise on the Frequency Resolution of a Sweep-Tuned Spectrum Analyzer | Session 129: Spin and Heat Transports |
| 1809 | Quantitative temperature dependence of the Spin Seebeck effect in a mixed valent manganite | De, Avirup; Ghosh, Arup; MANDAL, RAJESH; Ogale, Satishchandra; Nair, Sunil | Here, we report on the temperature dependence of the longitudinal spin Seebeck effect (LSSE) in the mixed valent manganite La 0.7Ca 0.3MnO 3. | Session 129: Spin and Heat Transports |
| 1810 | Coherent spin-phonon oscillations and demagnetization dynamics in the van der Waals ferromagnet CrI3 | Padmanabhan, Prashant; Buessen, Finn; Tutchton, Roxanne; Kwock, Kevin; Gilinsky, Samuel; Lee, Min-Cheol; McGuire, Michael; Singamaneni, Srinivasa; Yarotski, Dmitry; Paramekanti, Arun; Zhu, Jian-Xin; Prasankumar, Rohit | Here, we report on the non-equilibrium lattice and spin dynamics in CrI 3 across the magnetic phase transition. | Session 129: Spin and Heat Transports |
| 1811 | Spin-dependent Seebeck and Nernst effects in a skyrmion ideal gas | Zadorozhnyi, Andrei; Dahnovsky, Yuri | From the numerical solution of the matrix Boltzmann equation for a nonequilibrium distribution function and the Lippmann-Schwinger equation for a T-matrix we find the strong nonlinear behaviors in the thermoelectric coefficients depending on skyrmion/vortex diameters and electron concentrations. | Session 129: Spin and Heat Transports |
| 1812 | Thermal transport in yttrium iron garnet at very high magnetic fields | Ratkovski, Danilo; Balicas, Luis; Bangura, Alimami; Machado, Fernando; Rezende, Sergio | Here, we report measurements of the thermal conductivity in YIG under magnetic fields up to 31.4 T to increase the magnon energy gap, to suppress the magnon contribution and isolate that of the phonons relative to their behavior at zero-field. | Session 129: Spin and Heat Transports |
| 1813 | Large zero-field Hall & Nernst effects and AMR in aligned MnBi / Bi composites | Wooten, Brandi; Vandaele, Koen; Boona, Steve; Heremans, Joseph P | Large zero-field Hall & Nernst effects and AMR in aligned MnBi / Bi composites | Session 129: Spin and Heat Transports |
| 1814 | Spin current transport in EuIG thin films grown by pulsed laser deposition | Yuan, Wei; Liu, Haoyu; Ortiz, Victor; Shi, Jing | In this work, we investigate the spin transport in europium iron garnet (EuIG) thin films using spin Seebeck effect (SSE) and nonlocal transport. | Session 129: Spin and Heat Transports |
| 1815 | Operating ferrimagnet as terahertz antiferromagnetic spin-torque oscillator | Zhang, Hantao; Guo, Mingda; Cheng, Ran | We find that anti-damping torques can trigger spontaneous oscillation of the exchange mode in FIMs, resembling the terahertz AFM spin dynamics. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1816 | Terahertz spin-to-charge conversion by interfacial skew scattering in magnetic metal bilayers | Gueckstock, Oliver; Nadvornik, Lukas; Gradhand, Martin; Seifert, Tom; Bierhance, Genaro; Wolf, Martin; Vafaee, Mehran; Cramer, Joel; Woltersdorf, Georg; Mertig, Ingrid; Jakob, Gerhard; Klaeui, Mathias; Kampfrath, Tobias | Here, we study ultrafast S2C at interfaces by terahertz (THz) emission spectroscopy [3-4] in a model system: F|N bilayers consisting of thin metal films of a ferromagnetic layer F and nonmagnetic layer N with strong and weak spin-orbit coupling (SOC). | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1817 | Terahertz spin dynamics in antiferromagnetic Mn2Au | Behovits, Yannic; Chekhov, Alexander; Bodnar, Stanislav; Jourdan, Martin; Klaeui, Mathias; Kampfrath, Tobias | Here, we employ a THz-pump optical-probe setup to investigate spin dynamics in Mn 2Au thin films in the small-perturbation regime. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1818 | Terahertz Magnon Polaritons in YFeO3 in Pulsed High Magnetic Fields | Baydin, Andrey; Hayashida, Kenji; Marquez Peraca, Nicolas; Makihara, Takuma; Tay, Fuyang; Li, Xinwei; Ma, Xiaoxuan; Jin, Zuanming; Ren, Wei; Ma, Guohong; Noe, Gary; Katayama, Ikufumi; Takeda, Jun; Nojiri, Hiroyuki; Turchinovich, Dmitry; Cao, Shixun; Bamba, Motoaki; Kono, Junichiro | We developed a microscopic theoretical model that explains the data without any fitting parameters. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1819 | Same driving force for laser-induced ultrafast demagnetization and THz spin transport | Rouzegar, Reza; Brandt, Liane; Nadvornik, Lukas; Chekhov, Alexander; Reiss, David; Gueckstock, Oliver; Wolf, Martin; Seifert, Tom; brouwer, Piet; Woltersdorf, Georg; Kampfrath, Tobias | We investigate the driving force of two phenomena that follow femtosecond laser excitation: ultrafast magnetization quenching and spin transport. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1820 | Ultrafast demagnetization of ferromagnetic iron following optical vs terahertz excitation | Chekhov, Alexander; Behovits, Yannic; Heitz, Julius; Denker, Christian; Reiß, David; Wolf, Martin; Weinelt, Martin; brouwer, Piet; Muenzenberg, Markus; Kampfrath, Tobias | To tackle this issue, we perform a direct comparison of magnetization dynamics of an iron thin film triggered by an ultrashort optical pump pulse (photon energy 3 eV, strongly nonthermal perturbation) and a terahertz pump pulse (4 meV, quasi-thermal perturbation) [2]. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1821 | Ultrafast demagnetization times in ferromagnetic alloys | Zhang, Guoping; Bai, Yihua; George, Thomas | In this presentation, we take L10-FeNi as an example and employ the time-dependent Liouville density-matrix functional theory to compute laser-induced ultrafast demagnetization. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1822 | Effect of demagnetization factors on spin current transport | WU, PO-HSUN; Chan, Ying-Ting; Hung, Tzu-Chao; Zhang, Yi-Hui; Qu, Danru; Chuang, Tien-Ming; Chien, C. L.; Huang, Ssu Yen | In this work [1], we demonstrated the strong influence of the demagnetizing field on the spin current transports, including the spin Seebeck effect, spin Hall magnetoresistance, and planar Hall resistance, in Pt/YIG. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1823 | Terahertz photoconductivity and photocarrier dynamics in graphene–mesoporous silicon nanocomposites | Jubgang Fandio, Defi Junior | We investigate the photocarrier and charge transport dynamics in graphene-mesoporous silicon nanocomposites using optical pump-terahertz probe technique. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1824 | Spin-current across the metamagnetic transition in FeRh films as measured with THz emission spectroscopy | Lv, Yinchuan; Saglam, Hilal; shim, Soho; Gibbons, Jonathan; Hoffmann, Axel; Mason, Nadya; Mahmood, Fahad | Here we perform THz emission spectroscopy on thin films of FeRh, which is well known to undergo an antiferromagnetic to ferromagnetic phase transition around room temperature. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1825 | Terahertz Emission from Inverse Spin Hall Effect in β-W | Romero, Ralph; Budhani, Ramesh; Armitage, Norman | Here we demonstrate THz emission from a magnetic/heavy metal bilayer of CoFe/β-W deposited on a magnetic spinel MgAl 2O 4 substrate. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1826 | Electrically detected spin currents generated by sub-terahertz microwaves | Shi, Jing; Li, Junxue; Wilson, C; Lohmann, Mark; Cheng, Ran; Kavand, Marzieh; Yuan, Wei; Aldosary, Mohammed; Agladze, Nikolay; Wei, Peng | At the AFM resonance, we observed a sign change in the ISHE voltage at ~45 K as the temperature is varied. | Session 130: Terahertz Spintronics and Demagnetization Dynamics |
| 1827 | Reservoir Computing with Frustrated Nanomagnet Arrays | Edwards, Alexander; Zhou, Peng; Bhattacharya, Dhritiman; McDonald, Nathan; Garcia-Sanchez, Felipe; Loomis, Lisa; Thiem, Clare; Atulasimha, Jayasimha; Friedman, Joseph | We propose a novel reservoir comprising a planar arrangement of nanomagnets each having perpendicular magnetic anisotropy (PMA) [2]. | Session 131: Spin Ice |
| 1828 | Chiral switching and relaxation dynamics in artificial square ice | Leo, Naëmi; Koraltan, Sabri; Pancaldi, Matteo; Villalba González, Pedroáá; Abert, Claas; Vogler, Christoph; Hofhuis, Kevin; Slanovc, Florian; Bruckner, Florian; Heistracher, Paul; Menniti, Mattoe; Suess, Dieter; Vavassori, Paolo | In this work, we consider how the switching behaviour of a nanomagnet in archetypical artificial square ice is modified by the interaction with its six nearest neighbours, and find that barrier energies for clockwise and counter-clockwise rotation can differ significantly. | Session 131: Spin Ice |
| 1829 | Emergent Strings in Santa Fe Artificial Spin Ice | Zhang, Xiaoyu; Duzgun, Ayhan; Lao, Yuyang; Bingham, Nicholas; Sklenar, Joseph; Saglam, Hilal; Chopdekar, Rajesh; Subzwari, Shayaan; Batley, Joseph; Watts, Justin; Bromley, Daniel; Leighton, Chris; O’Brien, Liam; Nisoli, Cristiano; Schiffer, Peter | Here we report a study on the Santa Fe Ice (SFI) system, which has an intrinsic population of excited vertices built into the geometry. | Session 131: Spin Ice |
| 1830 | Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice | Goryca, Mateusz; Zhang, Xiaoyu; Li, Jing; Balk, Andrew; Watts, Justin; Leighton, Chris; Nisoli, Cristiano; Schiffer, Peter; Crooker, Scott | Here we demonstrate that the archetypal square ASI lattice can host, in specific regions of its magnetic phase diagram, plasma-like regimes containing a high density of mobile magnetic monopoles. | Session 131: Spin Ice |
| 1831 | Complex Collective Effects in Vertex Frustrated Artificial Spin Ice | Schiffer, Peter | This research has been performed with many collaborators, including: Alan Albrecht, Joseph T. Batley, Nicholas S. Bingham, Daniel Bromley, Francesco Caravelli, Isaac Carrasquillo, Gia-Wei Chern, Rajesh Chopdekar, Karin Dahmen, Ayhan Duzgun, Daniel Gardeazabal, Ian Gilbert, Yuyang Lao, Brian Le, Chris Leighton, Michael Manno, Cristiano Nisoli, Liam O’Brien, Jungsik Park, Hilal Saglam, Andreas Scholl, Mohammed Sheikh, Joseph Sklenar, Shayaan Subzwari, Justin D. Watts, and Xiaoyu Zhang. | Session 131: Spin Ice |
| 1832 | A Magnon Approach to Thermal Fluctuations in Mesospins | Sloetjes, Sam; Hjörvarsson, Björgvin; Kapaklis, Vassilios | Here, we address thermal fluctuations of mesospins by means of characterizing the spectrum of thermally excited magnons, and build a framework to study these excitations based on numerical simulations. | Session 131: Spin Ice |
| 1833 | Avalanches from the ground state in artificial square ice | Bingham, Nicholas; Park, Jungsik; Simon, Alejandro; Zhu, William; Watts, Justin; Zhang, Xiaoyu; Batley, Joseph; Dahmen, Karin; Leighton, Chris; Schiffer, Peter | In this work, we utilize the customizable nature of artificial spin ice to examine avalanche processes under well-controlled circumstances. | Session 131: Spin Ice |
| 1834 | Field-tunable correlations in perpendicular artificial spin ice arrays | Kempinger, Susan; Huang, Yu-Sheng; Lammert, Paul; Vogel, Michael; Pearson, John; Hoffmann, Axel; Crespi, Vincent; Schiffer, Peter; Samarth, Nitin | We have overcome this limitation by fabricating perpendicular ASI systems from Pt/Co islands on a soft-magnetic Ni80Fe20 (Py) underlayer to increase interactions. | Session 131: Spin Ice |
| 1835 | Magnetic Monopole Noise on Octahedral Spin Ice | Nilsson Hallén, Jonathan; Moessner, Roderich; Castelnovo, Claudio | Here we consider a frustrated spin ice-like system , which we call octahedral spin ice (OSI), consisting of antiferromagnetically interacting Ising spins forming corner sharing octahedra. | Session 131: Spin Ice |
| 1836 | Proposal for Observing Magnetic Monopoles in Spin Ice via Electron Holography | Dhar, Ankur; Jaubert, Ludovic; Shintake, Tsumoru; Shannon, Nicholas | We explore the possibility of imaging monopoles via electron holography through experimental measurements of monopole and spin ice analogs, and computational simulation of how monopoles would appear in a pyrochlore spin ice thin film [4]. | Session 131: Spin Ice |
| 1837 | Ground state transitions in Tetris artificial spin ice | Saglam, Hilal; Zhang, Xiaoyu; Duzgun, Ayhan; Bingham, Nicholas; Lao, Yuyang; Kargioti, Aikaterini; Sklenar, Joseph; Gilbert, Ian; Nisoli, Cristiano | We have studied the dynamics of Tetris ice, which can be decomposed into so-called staircase and backbone bands. | Session 131: Spin Ice |
| 1838 | Influence of dipolar interaction on the spin-wave mode propagation in artificial spin ice | Arora, Nimisha; Das, Pintu | We have thus performed a detailed analysis of the role of dipolar interaction on the sw dynamics and propagation in square artificial spin ice (S-ASI). | Session 131: Spin Ice |
| 1839 | Monopole density and antiferromagnetic domains in spin-ice iridates | Castelnovo, Claudio; Szabo, Attila; Pearce, Matthew; Goetze, Kathrin; Sikkenk, Tycho; Lees, Martin; Boothroyd, Andrew; Dharmalingam, Prabhakaran; 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 131: Spin Ice |
| 1840 | Large and local magnetoresistance in a state-of-the-art perpendicular magnetic medium | Williamson, Morgan; Wang, Cheng; Huang, Pin-Wei; Ju, Ganping; Tsoi, Maxim | Large and local magnetoresistance in a state-of-the-art perpendicular magnetic medium | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1841 | Longitudinal and transverse unidirectional magnetoresistances driven by interfacial spin-orbital scattering | Mehraeen, M.; Shen, Pengtao; Zhang, Shulei | The recent observation of the unidirectional spin Hall magnetoresistance (USMR) — a longitudinal magnetoresistance that changes sign with the reversal of either the in-plane electric field or the magnetization — in ferromagnetic and heavy metal bilayers has led to increased interest in the study of nonlinear magnetotransport effects. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1842 | Linear and Nonlinear Two-Terminal Spin-Valve Effect from Chirality-Induced Spin Selectivity | Liu, Tianhan; Wang, Xiaolei; Wang, Hailong; Lochner, Eric; Schlottmann, Pedro; Von Molnar, Stephan; Zhao, Jianhua; Xiong, Peng | Here, we report definitive observation of CISS-induced magnetoconductance in vertical heterojunctions of (Ga,Mn)As/AHPA-L molecules/Au, directly verifying spin filtering by the AHPA-L molecules via spin detection by the (Ga,Mn)As. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1843 | Electrical Switching of Antiferromagnetic FexNbS2 driven by the collective dynamics of a coexisting spin glass | Maniv, Eran; Nair, Nityan; Haley, Shannon; Doyle, Spencer; John, Caolan; Cabrini, Stefano; Maniv, Ariel; Ramakrishna, Sanath; Tang, Yun-Long; Ercius, Peter; Ramesh, Ramamoorthy; Tserkovnyak, Yaroslav; Reyes, Arneil; Analytis, James | In this talk, I will show that the coexistence of spin glass and antiferromagnetic order allows a novel mechanism to facilitate the switching of the intercalated transition metal dichalcogenide Fe 1/3±δNbS 2, which is rooted in the electrically stimulated collective winding of the spin glass. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1844 | Evidence for ideal memristive functionality in ferromagnet/antiferromagnet nanostructures revealed by spin Hall effect-driven harmonic measurements | Ivanov, Sergei; Urazhdin, Sergei | We study thin-film Pt/Permalloy(Py)/CoO nanostrips to demonstrate the possibility to drive viscous magnetization dynamics of Permalloy by the current-driven spin Hall effect in Pt and the Oersted field and detect it using the anisotropic magnetoresistance. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1845 | Observation of magnetoelastic Gilbert damping in highly magnetostrictive Fe0.7Ga0.3 thin films | Peria, William; Yu, Heshan; Lee, Seunghun; Takeuchi, Ichiro; Crowell, Paul | Here we report a large magnetoelastic contribution to the Gilbert damping in highly magnetostrictive Fe 0.7Ga 0.3 thin films, which grows to as large as 6 times greater than the intrinsic damping at 50 K. To show this, we present the orientational and temperature dependence of the Gilbert damping. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1846 | Chirality induced spin selectivity through time-reversal symmetric helical molecular junctions | Utsumi, Yasuhiro; Entin-Wohlman, Ora; Aharony, Amnon | Chirality induced spin selectivity through time-reversal symmetric helical molecular junctions | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1847 | Non-charge-carrier-mediated spin-transport in an organic semiconductor | Popli, Henna; Wang, Jingying; Liu, Xiaojie; Lafalce, Evan; Tennahewa, Taniya; Malissa, Hans; Vardeny, Valy; Boehme, Christoph | We report experiments scrutinizing existing theoretical pictures of spin-transport in organic thin films, based on the idea that this is due to the same mechanisms as charge transport [1, 2], as it is the case for many inorganic materials. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1848 | Substrate Effects on Spin Lattice Relaxation in the Molecular Qubit CuPc | Mullin, Kathleen; Rondinelli, James | To address this challenge, we performed electronic structure calculations on a substrate-supported molecular magnet system, comprising copper(II) phthalocyanine(CuPc) on graphene, and examined changes in relaxation times using a spin lifetime proxy. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1849 | Temperature dependence of shot noise in double barrier magnetic tunnel junctions | Niu, Jiasen; Liu, Liang; Feng, Jiafeng; Han, Xiufeng; Coey, J M; Zhang, Xiaoguang; Wei, Jian | We report measurement of shot noise in CoFeB/MgO/CoFeB/MgO/CoFeB double barrier magnetic tunnel junctions, which shows a strong temperature dependence. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1850 | ac Hanle effect in spin valves | Bazaliy, Yaroslaw | We study the combination of the two effects: an ac Hanle effect in spin valves and find that it results in new types of signatures in the non-local voltage dependencies. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1851 | Magnetic and Electron-Transport Properties of Co2Si Nanomagnets | Pahari, Rabindra; Balasubramanian, Balamurugan; George, Tom; Manchanda, Priyanka; Ullah, Ahsan; Skomski, Ralph; Sellmyer, David | In this work, we investigate ferromagnetism and magnetotransport in thin films of Co2Si nanoclusters experimentally and theoretically. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1852 | Current-induced unidirectional magnetoresistance in Pt/FeRh bilayers | Shim, Julie; Saglam, Hilal; Gibbons, Jonathan; Oh, Junseok; Li, Yi; Zhang, Wei; Zhang, Shulei; Hoffmann, Axel; Sklenar, Joseph; Mason, Nadya | In this work, we report a UMR effect in the antiferromagnetic phase of a Pt/FeRh bilayer. | Session 132: Magneto-Transports and Magnetic Interfaces |
| 1853 | Scanning Tunneling Microscopy and Spectroscopy of MnBi2Te4 | Plumadore, Ryan; Zhu, Yanglin; Guan, Yingdong; Lee, Seng Huat; Mao, Zhiqiang; Luican-Mayer, Adina | In this talk we discuss low-temperature scanning tunneling microscopy and spectroscopy measurements of MnBi 2Te 4. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1854 | Characterization of the Layered Antiferromagnetic Topological Insulator MnBi2Se4 Using Scanning Tunneling Microscopy | Walko, Robert; Zhu, Tiancong; Bishop, Alexander; Kawakami, Roland; Gupta, Jay | We used scanning tunneling microscopy to study a 20 SL MBS film grown using molecular beam epitaxy and observed two distinct surface terminations, Se and Bi, which we characterized with scanning tunneling spectroscopy (STS) and differential conductance mapping. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1855 | Realisation of Wide Bandgap Quantum Anomalous Hall Insulator in Ultra-thin MnBi2Te4 and Bi2Te3 Heterostructures | Li, Qile; Trang, Chi Xuan; Wu, Weikang; Hwang, Jinwoong; Mo, Sung-Kwan; Medhekar, Nikhil; Yang, Shengyuan; Edmonds, Mark | 2 Here we demonstrate the growth of 1SL MnBi 2Te 4 and 4QL Bi 2Te 3 heterostructures via MBE, and probe the electronic structure using angle resolved photoelectron spectroscopy. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1856 | Ferromagnetism and anomalous Hall effect in MnBi6Te10 | Zhu, Yanglin; Mao, Zhiqiang | In this talk, we report the successful growth of FM Mn(Bi 1-xSb x) 6Te 10 ( x = 0, 0.08, 0.12, 0.3) crystals. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1857 | Realizing gapped surface states in the magnetic topological insulator MnBi2-xSbxTe4 | Ko, Wonhee; Kolmer, Marek; Yan, Jiaqiang; Pham, Anh; Fu, Mingming; Luepke, Felix; Okamoto, Satoshi; Ganesh, Panchapakesan; Gai, Zheng; Li, An-Ping | By shifting the Fermi level into the bulk band gap, we access the surface states and show a band gap of 50 meV at the Dirac point from quasiparticle interference measured by scanning tunneling microscopy (STM). | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1858 | Spin waves in the antiferromagnetic topological insulators MnBi2Te4 and MnBi4Te7 | Li, Bing; Ke, Liqin; Riberolles, Simon; Pajerowski, Daniel; Kreyssig, Andreas; Ueland, Benjamin G.; Yan, Jiaqiang; McQueeney, Robert J. | Here we present our inelastic neutron scattering (INS) study on single crystals MnBi 2Te 4 and MnBi 4Te 7. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1859 | Layer-dependent phonons in the magnetic topological insulator MnBi2Te4 | Choe, Jeongheon; Lujan, David; Rodriguez-vega, Martin; Ye, Zhipeng; Quan, Jiamin; Leonardo, Aritz; Nunley, Timothy; Yan, Jiaqiang; Fiete, Gregory; He, Rui; Li, Xiaoqin (Elaine) | We applied Raman spectroscopy to investigate lattice vibrational modes in the magnetic topological insulator MnBi 2Te 4 with thicknesses ranging from 1 to 5 septuple layers. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1860 | Competing magnetic interactions in MnBi4Te7 | Guan, Yingdong; Ning, Wei; Lee, Seng Huat; Mao, Zhiqiang | In this talk, we will show a ferromagnetic (FM) phase with T C~14 K can be realized with a small concentration substitution of Sb for Bi in Mn(Bi,Sb) 4Te 7. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1861 | Probing magnetic orders in atomically thin Chern insulator MnBi2Te4 | Lin, Zhong; Ovchinnikov, Dmitry; Huang, Xiong; Fei, Zaiyao; Cai, Jiaqi; Song, Tiancheng; He, Minhao; Jiang, Qianni; Wang, Chong; Li, Hao; Wang, Yayu; Wu, Yang; Xiao, Di; Chu, Jiun-Haw; Yan, Jiaqiang; Chang, Cui-Zu; Cui, Yongtao; Xu, Xiaodong | In this work, we probe the intrinsic magnetism of atomically thin MnBi 2Te 4 samples by reflective magnetic circular dichroism (RMCD), and correlate their magnetic order with transport measurements. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1862 | The induced axion-phason field in Weyl semimetals | Schmeltzer, David; Saxena, Avadh | This theory, for a Weyl semimetal with two nodes in the direction of the magnetic field, gives rise to a one-dimensional sliding charge-density-wave (CDW) when the chemical potential is above the highest occupied Landau level (in the insulating phase), and is absent in the metallicphase. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1863 | Axion insulator and helical Chern insulator phases in MnBi2Te4 | Wang, Yayu | In this talk, we report transport studies of exfoliated MnBi 2Te 4 flakes with varied layer structure and magnetic fields. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1864 | Quantum Transport on MnBi2Te4 Thin Films Grown on Sapphire | Akhgar, Golrokh; Liu, Chang; Li, Qile; Fuhrer, Michael; Edmonds, Mark | 1 Here, we report the growth of ultra-thin MnBi 2Te 4 on sapphire by molecular beam epitaxy. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1865 | Magnetic Phase Transitions and the Origin of Anomalous Hall Effect on MnBi2Te4 Grown by MBE | Bac, Seul-Ki; Riney, Logan; Wang, Jiashu; Koller, Kerrie; Liu, Xinyu; Zhukovskyi, Maksym; Orlova, Tatyana; Dobrowolska, Malgorzata; Furdyna, J; Assaf, Badih | Here we report on the magnetic properties of MnBi 2Te 4 grown by MBE with various thicknesses. | Session 133: Magnetic Topological Materials 1: Mn-Bi-Te |
| 1866 | Materials for nanoscale spatial control of ferromagnetic phase transitions | Fallarino, Lorenzo | Multilayer structures have revealed an impressive variety of collective properties, and they represent an established approach to materials design with widespread applications [1]. | Session 134: Nanoscale Designed Magnetic Films |
| 1867 | Controlling magnetic configuration in the soft/hard bilayers probed by PNR | Tang, Nan; Gilbert, Dustin; Kirby, Brian | Here, we present polarized neutron reflectometry (PNR) to experimentally study magnetic configurations in hard/soft bilayers. | Session 134: Nanoscale Designed Magnetic Films |
| 1868 | Magnetic Modulation In Ferrimagnetic Fe1-XGdx Thin Film Multilayer Structures By Variation of Compensation Temperature | Shoup, Jenae; Kirby, Brian; Arena, Dario | The magnetic interface of such structures is undetermined and we will use polarized neutron reflectometry (PNR) to examine spin ordering in the interfacial region as a function of field and temperature. | Session 134: Nanoscale Designed Magnetic Films |
| 1869 | In-Depth Structural and Magnetic Characterizations of Fe and CrN Bilayer System | Alam, Khan; Smith, Arthur; Sun, Kai; Foley, Andrew | In this project, we grow high quality epitaxial Fe/CrN bilayer thin films on MgO(001) by molecular beam epitaxy. | Session 134: Nanoscale Designed Magnetic Films |
| 1870 | Magneto-ionic Enhancement of Exchange Bias in MnN/CoFe | Jensen, Christopher; Quintana, Alberto; Quarterman, Patrick; Grutter, Alexander; Liu, Kai | 2 We have investigated nitrogen-ion induced exchange bias effects in MnN/CoFe films grown on a Ta seed layer. | Session 134: Nanoscale Designed Magnetic Films |
| 1871 | Nanoscale manipulation of magnetic domains by strain-induced proximity | Batlle, Xavier; Valmianski, Ilya; Fraile Rodríguez, Arantxa; Rodriguez Alvarez, Javier; Garcia del Muro, Montserrat; Wolowiec, Christian; Kronast, Florian; Ramirez, Juan; Schuller, Ivan; Labarta, Amílcar | By synchrotron-based X-ray microscopy we show a reconfiguration of the FM domain pattern across the V 2O 3 SPT. | Session 134: Nanoscale Designed Magnetic Films |
| 1872 | Observations of Exchange Bias in Patterned Bilayers using Three-Axis Torque Magnetometry. | Thibault, John; Fast, Katryna; Sauer, Vince; Dunsmore, Michael; Losby, Joe; Diao, Zhu; Luber, Eric; Belov, Miro; Freeman, Mark | We report studies of exchange bias in circular disk bilayers of 20nm Permalloy/20nm cobalt oxide, lithographically patterned on nanomechanical resonators. | Session 134: Nanoscale Designed Magnetic Films |
| 1873 | First-principles calculations of spin-orbit torques in a Mn2Au/HM bilayer | Fang, Wuzhang; Belashchenko, Kirill | In this work, by using first-principles calculations, we calculate the SOTs of a Mn 2Au/HM bilayer, where HM is W or Pt. | Session 134: Nanoscale Designed Magnetic Films |
| 1874 | Spin-reorientation transition in an Fe double-layer on W(110) induced by Dzyaloshinsky-Moriya interaction | Nagyfalusi, Balázs; Udvardi, László; Szunyogh, László; Rozsa, Levente | In this talk present a study of the temperature-driven spin reorientation transition in two atomic layers of Fe on W(110) using well-tempered metadynamics simulations based on a spin model parametrized by ab initio calculations. | Session 134: Nanoscale Designed Magnetic Films |
| 1875 | Structural and Magnetotransport Properties of Epitaxial Ferrimagnetic Mn4N Thin Films on GaN by Plasma-assisted Molecular Beam Epitaxy | Zhang, Zexuan; Cho, Yongjin; Chang, Celesta; Gong, Mingli; Ho, Shaoting; Singhal, Jashan; Xing, Huili; Jena, Debdeep | Here we report integration of Mn 4N on GaN with smooth surface by plasma assisted molecular beam epitaxy. | Session 134: Nanoscale Designed Magnetic Films |
| 1876 | Temperature-dependent magnetic transitions in CoCrPt-Ru-CoCrPt synthetic ferrimagnets (SFM) | Beauchamp, Bradlee; Marinero, Ernesto | In this work we expand the framework to include synthetic ferrimagnets (SFMs) comprising higher perpendicular magnetic anisotropy materials and large (4X) interlayer exchange coupling energies which are promising for the development of ultrafast (ps) magnetic switching free layers in MTJ structures. | Session 134: Nanoscale Designed Magnetic Films |
| 1877 | Electric-field control of ferromagnetic regions to form intrinsic tunnel junctions in dynamically phase separated manganites | Shakya, Ambika; Biswas, Amlan | We have observed tunneling magnetoresistance (TMR) behavior in the magnetic easy as well as hard axis directions of LPCMO. | Session 134: Nanoscale Designed Magnetic Films |
| 1878 | Site preference and magnetic properties of Mn substituted M-type strontium hexaferrite | Lamichhane, Bipin; Thapa, Dinesh; Nandadasa, Chandani; Choi, Minyeong; Hong, Yang-Ki | In this work, we use Mn to substitute Fe for possible technical applications. | Session 134: Nanoscale Designed Magnetic Films |
| 1879 | Perpendicular magnetic anisotropy and low magnetic damping in epitaxial Li0.5Al1.0Fe1.5O4 thin films | Zheng, Xin Yu; Channa, Sanyum; Galazka, Zbigniew; Suzuki, Yuri | In this talk, we present our preliminary results on simultaneously achieving PMA and low damping in spinel oxide Li 0.5Al 1.0Fe 1.5O 4 (LAFO) films grown on (001) oriented MgGa 2O 4. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1880 | Spin-current generation and Spin-Orbit Torque switching in Perpendicularly Magnetized Insulating Ni0.65Zn0.35Fe1.2Al0.8O4 films | Channa, Sanyum; Galazka, Zbigniew; Emori, Satoru; Gray, Matthew; Suzuki, Yuri | In this talk, we demonstrate PMA as well as low damping in spinel ferrite Ni 0.65Zn 0.35Fe 1.2Al 0.8O 4 (NZAFO) films grown on (001)-oriented MgGa 2O 4 (MGO) substrates under tensile strain. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1881 | Magnon transport in three-terminal YIG/Pt nanostructures studied by dc and ac detection techniques | Gückelhorn, Janine; Wimmer, Tobias; Geprägs, Stephan; Huebl, Hans; Gross, Rudolf; Althammer, Matthias | We demonstrate that both techniques are well suited to investigate incoherent magnon transport in these three-terminal devices. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1882 | Coherent ac spin current transmission across an antiferromagnetic CoO insulator | Li, Qian; Yang, Mengmeng; Klewe, Christoph; Shafer, Padraic; N’Diaye, Alpha; Hou, Dazhi; Wang, Tianye; Gao, Nan; Saitoh, Eiji; Hwang, Chanyong; Hicken, Robert; Li, Jia; Arenholz, Elke; Qiu, Ziqiang | Utilizing element- and time-resolved x-ray pump-probe measurements on Py/Ag/CoO/Ag/ Fe 75Co 25/MgO(001) heterostructures, here we demonstrate that a coherent GHz ac spin current pumped by the Py ferromagnetic resonance can transmit coherently across an antiferromagnetic CoO insulating layer to drive a coherent spin precession of the Fe 75Co 25 layer. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1883 | Observation of Antiferromagnetic Magnon Pseudospin Dynamics and the Hanle effect | Wimmer, Tobias; Kamra, Akashdeep; Gückelhorn, Janine; Opel, Matthias; Geprägs, Stephan; Gross, Rudolf; Huebl, Hans; Althammer, Matthias | We observe an oscillation in polarity of the magnon spin signal at the detector as a function of the externally applied magnetic field. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1884 | Novel spin-orbit torque generation at room temperature in an all-oxide epitaxial La0.7Sr0.3MnO3/SrIrO3 system | Huang, Xiaoxi; Sayed, Shehrin; Mittelstaedt, Joseph; Susarla, Sandhya; Karimeddiny, Saba; Caretta, Lucas; Zhang, Hongrui; Gosavi, Tanay; Mahfouzi, Farzad; Sun, Qilong; Ercius, Peter; Kioussis, Nicholas; Salahuddin, Sayeef; Ralph, Daniel; Ramesh, Ramamoorthy | We use spin-torque ferromagnetic resonance to probe the effective magnetization and the SOT efficiency in LSMO/SIO heterostructures grown on STO substrates. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1885 | Optical Measurements of Epitaxially Grown Ferrimagnetic Insulator Thin Films | Nunley, Timothy; Chang, Liang; Guo, Side; Lujan, David; Lee, Shang-Fan; Yang, Fengyuan; Li, Xiaoqin (Elaine) | We investigate Tm 3Fe 5O 12 thin films with atomically sharp interfaces and properties tunable via eptaxial strain. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1886 | Spin Hall magnetoresistance in Pt/hexagonal rare-earth ferrite heterostructures | Li, Jing; Yun, Yu; Xu, Xiaoshan | We report measurements of field-dependent and angle-dependent magnetoresistance from Pt/h-RFeO 3 heterostructures at various temperatures. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1887 | Towards skyrmionic spin textures combined with SrTiO3 two-dimensional electron gases | Moreno, Luis; Mallik, Srijani; Bouzehouane, Karim; Valencia, Sergio; Reyren, Nicolas; Barthélémy, Agnès; Bibes, Manuel | In this presentation we will show that the metal oxide (e.g. AlOx) thus formed can be combined with ferromagnetic and heavy-metal-based ultrathin films to generate various types of magnetization configurations with in-plane or out-of-plane anisotropy, depending on their relative thicknesses. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1888 | Zero-bias Giant Rashba Spin-Orbit Coupling Controlled by Carrier Modulation Layer | Omar, Ganesh Ji; Ariando, Ariando | We use an entirely new model to provide evidence of generating Rashba SOC. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1889 | 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 135: Oxide Thin Films for Spintronics and Magnonics |
| 1890 | High-quality single-crystalline Europium iron garnet films with perpendicular magnetic anisotropy by sputtering | Guo, Meng-Xin; Liu, Y.C.; Wu, Chi-Nan; Cheng, C. K.; Chen, W. N.; Chen, Tian-Yue; Zhou, S.Q.; Pai, Chi-Feng; Lee, Shang-Fan; Hong, Minghwei; Kwo, Jueinai | We demonstrate the high-quality europium iron garnet (EuIG) thin films with strain-induced perpendicular magnetic anisotropy (PMA) grown on GGG (001) using an off-axis sputtering technique. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1891 | SrTiO3-based 2-dimensional electron gases for ultralow power spintronics | Bibes, Manuel | I will present results from both spin-charge conversion where spins are injected by spin pumping in a FMR cavity and detected as a transverse voltage 1, and from charge-spin conversion probed through the bilinear magnetoresistance (BMR) effect. | Session 135: Oxide Thin Films for Spintronics and Magnonics |
| 1892 | Thickness-dependent perovskite octahedral distortions at heterointerfaces | Fowlie, Jennifer; Lichtensteiger, Céline; Gibert, Marta; Meley, Hugo; Willmott, Philip; Triscone, Jean-Marc | Here we have demonstrated that the synchrotron x-ray diffraction approach successfully developed to extract the oxygen positions from half-order Bragg peaks [2] can be applied to films as thin as 2 nm [3]. | Session 136: Nickelates and Manganites |
| 1893 | Mapping electronic phase coexistence in nickelate superlattices by STEM-EELS | Mundet, Bernat; Alexander, Duncan; Dominguez Ordonez, Claribel; Fowlie, Jennifer; Gibert, Marta; Triscone, Jean-Marc | Here, we show that scanning transmission electron microscopy in combination with electron energy-loss spectroscopy (STEM-EELS) can be used to map electronic phase coexistence in rare-earth nickelate materials. | Session 136: Nickelates and Manganites |
| 1894 | Fundamental difference in the electronic reconstruction of infinite-layer vs. perovskite neodymium 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) ( n = 2,3) by performing first-principles calculations including a Coulomb repulsion term [2]. | Session 136: Nickelates and Manganites |
| 1895 | The role of the interface in La0.67Sr0.33MnO3/YBa2Cu3O7-δ heterostructures probed by polarized neutron reflectometry | Wisser, Jacob; Grutter, Alexander; Quarterman, Patrick; Balakrishnan, Purnima; Kirby, Brian; Suzuki, Yuri | To further explore this role, we have studied magnetotransport in YBa 2Cu 3O 7-δ (YBCO)/La 0.67Sr 0.33MnO 3 (LSMO) heterostructures fabricated via pulsed laser deposition on (LaAlO 3) 0.3(Sr 2TaAlO 6) 0.7 (LSAT) (001) substrates. | Session 136: Nickelates and Manganites |
| 1896 | Tuning the Charge Distribution via Strain Engineering in Manganite-Cuprate Heterostructures | Wu, Yu-Mi; Kim, Gideok; Cristiani, Georg; Logvenov, Gennady; Suyolcu, Y. Eren; Keimer, Bernhard; van Aken, Peter A. | Here, we reveal the local charge distribution in manganese oxides by means of high spatial and energy resolution scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS). | Session 136: Nickelates and Manganites |
| 1897 | Spontaneous Phase Segregation of Sr2NiO3 and SrNi2O3 during SrNiO3 Heteroepitaxy | Wang, Le; Yang, Zhenzhong; Yin, Xinmao; Zhou, Hua; Chambers, Scott; Du, Yingge | Here, we show that spontaneous phase segregation occurs while depositing SrNiO 3 thin films on perovskite oxide substrates by molecular beam epitaxy. | Session 136: Nickelates and Manganites |
| 1898 | Probing the electronic ground states of thin film Ruddlesden-Popper (Rn+1NinO3n+1) nickelates | Pan, Grace; Song, Qi; Ferenc Segedin, Dan; Doyle, Spencer; LaBollita, Harrison; Paik, Hanjong; Brooks, Charles; Sanchez Botana, Antia; 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 136: Nickelates and Manganites |
| 1899 | 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 136: Nickelates and Manganites |
| 1900 | Charge Engineering of RNiO3-based Mott Transistors with a Ferroelectric Gate | 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 136: Nickelates and Manganites |
| 1901 | Physics of Star Wars | Johnson, Patrick | As an adult, he wrote a book that tries to explain different theories as to how scenes and devices in the Star Wars universe work. | Session 137: Physics for Everyone |
| 1902 | Science and Cooking: Making Physics Fun (and Tasty!) | Weitz, David | This talk will describe the experiences of a physics course for non-scientists that makes physics fun. | Session 137: Physics for Everyone |
| 1903 | Using Superheroes to Engage the Public | Kakalios, James | I will describe examples of using superheroes in science communication, such as how the Black Panther’s vibranium suit relates to the principle of conservation of energy, while the Infinity Stones (the MacGuffin of the last 22 Marvel Cinematic Universe films) can be connected to Emmy Noether and her theory relating conservation principles and symmetries in the laws of physics. | Session 137: Physics for Everyone |
| 1904 | The Physics of NASCAR: Using Motorsports to Introduce Materials Physics and Physicists | Leslie-Pelecky, Diandra | I’ve used NASCAR to talk about everything from Kevlar and Nomex to the Second Law of Thermodynamics. | Session 137: Physics for Everyone |
| 1905 | Bringing Science to the Public Using Popular Culture | Ramirez, Ainissa | This talk describes the use of popular culture as a way to bring scientific ideas to life. | Session 137: Physics for Everyone |
| 1906 | Microwave and spin transfer torque driven coherent control in ferromagnets | Brik, Marina; Bernstein, Nirel; Capua, Amir | This technique is interesting in the context of ferromagnetic materials because of the ability to combine it with spintronics for the purpose of fundamental spin transport research, low-power information processing, and potentially future quantum bit (Qubit) applications. | Session 138: Spin Transfer and Spin Torques |
| 1907 | Temperature-dependent spin-transport and current-induced torques in superconductor/ferromagnet heterostructures | Müller, Manuel; Liensberger, Lukas; Flacke, Luis; Huebl, Hans; Kamra, Akashdeep; Belzig, Wolfgang; Gross, Rudolf; Weiler, Mathias; Althammer, Matthias | We investigate the injection of quasiparticle spin currents in a NbN/Permalloy (Py) heterostructures with a Pt spin sink layer. | Session 138: Spin Transfer and Spin Torques |
| 1908 | Magnetic Droplet Solitons from Unconventional Out-of-Plane Spin Orbit Torques | Klause, Robin; Hoffmann, Axel | Towards this end, we investigated with micromagnetic simulations if these unconventional OOP SOTs can generate droplet solitons in rectangular geometries. | Session 138: Spin Transfer and Spin Torques |
| 1909 | Origin of Nonlinear Damping due to Mode Coupling in Auto-Oscillatory Modes Strongly Driven by Spin-Orbit Torque | Lee, Inhee; Zhang, Chi; Singh, Simranjeet; McCullian, Brendan; Hammel, P Chris | We investigate the physical origin of nonlinear damping due to mode-mode coupling between several auto-oscillatory modes driven by spin-orbit torque in constricted Py/Pt heterostructures by examining the dependence of auto-oscillation on temperature and applied field angle. | Session 138: Spin Transfer and Spin Torques |
| 1910 | Controlling itinerant spin dynamics for enhanced spin transfer torque | Semenov, Yuriy; Xu, Xinyi; Kim, Ki | In this work, we reexamine the STT process by explicitly considering the dephasing between the injected electron spins. | Session 138: Spin Transfer and Spin Torques |
| 1911 | Anomalous spin Hall and inverse spin Hall effects in magnetic systems | Wang, Xiang Rong | We predict anomalous spin-Hall effects (SHEs) and anomalous inverse SHEs in magnetic systems. | Session 138: Spin Transfer and Spin Torques |
| 1912 | Interfacial crystal Hall effect reversible by ferroelectric polarization | Shao, Ding-Fu; Ding, Jun; Gurung, Gautam; Zhang, Shuhui; Tsymbal, Evgeny | Here, we predict the appearance of the CHE in heterostructures composed of compensated antiferromagnetic metals and non-magnetic insulators due to reduced symmetry at the interface. | Session 138: Spin Transfer and Spin Torques |
| 1913 | Gate-tunable spin torque and edge current in magnetized graphene nanoribbons caused by spin-orbit coupling | Martins de Sousa, Matheus; Chen, Wei | Motivated by recent experiments that demonstrate gate-tunable spin-orbit coupling (SOC) in graphene heterostructures, we investigate the effect of SOC on the magnetic response of graphene. | Session 138: Spin Transfer and Spin Torques |
| 1914 | Magnetic skyrmions probed by SP-STM: topology imprinted on the charge current and spin transfer torque | Palotas, Krisztian; Rozsa, Levente; Szunyogh, László | Our work contributes to this understanding by a theoretical investigation of the tunneling electron charge and spin transport probing magnetic skyrmions. | Session 138: Spin Transfer and Spin Torques |
| 1915 | Magnetization control by angular momentum transfer from surface acoustic wave to ferromagnetic spin moments | Sasaki, Ryo; Nii, Yoichi; Onose, Yoshinori | Here we demonstrate that the phonon angular momentum of surface acoustic wave can control the magnetization of a ferromagnetic Ni film by means of the phononic-to-electronic conversion of angular momentum in a Ni/LiNbO 3 hybrid device. | Session 138: Spin Transfer and Spin Torques |
| 1916 | Energy and momentum conservation in spin transfer | Mitrofanov, Alexander; Urazhdin, Sergei | We use fully quantum simulations of scattering of spin-polarized electron wavepacket by a ferromagnet modelled as a 1d spin-1/2 chain, to show that energy and momentum conservation laws impose strong restrictions on the characteristics of magnetic excitations generated by spin transfer. | Session 138: Spin Transfer and Spin Torques |
| 1917 | Ballistic-to-diffusive transition in spin chains with broken integrability | Ferreira, João; Filippone, Michele | We study the ballistic-to-diffusive transition induced by the weak breaking of integrability in a boundary-driven XXZ spin-chain. | Session 138: Spin Transfer and Spin Torques |
| 1918 | Spin current driven Rabi oscillations in a ferromagnetic film | Bernstein, Nirel; Brik, Marina; Assouline, Benjamin; Yang, See-Hun; Capua, Amir | In this work we take the non-adiabatic interaction in a magnetic medium a step further by replacing the microwave electromagnetic field with an oscillatory spin current that is generated by the spin Hall effect. | Session 138: Spin Transfer and Spin Torques |
| 1919 | Spin transfer torque driven by interfacial roughness and spin-orbital scattering | Shen, Pengtao; Mehraeen, M.; Zhang, Shulei | In this work, we theoretically investigate a spin-transfer torque effect in a ferromagnetic metal layer emanating from surface roughness and Rashba spin-orbit scattering in the presence of an in-plane charge current. | Session 138: Spin Transfer and Spin Torques |
| 1920 | Planar Hall Driven Torque in a Ferromagnet/Nonmagnet/Ferromagnet System | Safranski, Christopher; XU, Jun-Wen; Kent, Andrew; Sun, Jonathan | We find the strength of this effect to be comparable to that of the spin Hall effect. | Session 138: Spin Transfer and Spin Torques |
| 1921 | Multi-domain memristive magnetization switching in [Co/Ni]X/PtMn heterostructures | Krishnaswamy, Gunasheel Kauwtilyaa; Kurenkov, Alexander; Sala, Giacomo; Baumgartner, Manuel; Krizakova, Viola; Nistor, Corneliu; Maccherozzi, Francesco; Dhesi, Sarnjeet; Fukami, Shunsuke; Ohno, Hideo; Gambardella, Pietro | We use x-ray photoemission electron microscopy to image the FM and AFM domains of [Co/Ni] X/PtMn layers at intermediate switching states as a function of injected currents. | Session 139: Spin Transport and Spintronics |
| 1922 | Magnetic domain-wall inverter and diode | Luo, Zhaochu; Stefan, Schären; Hrabec, Aleš; Dao, Phuong; Sala, Giacomo; Finizio, Simone; Feng, Junxiao; Mayr, Sina; Raabe, Jörg; Gambardella, Pietro; Heyderman, Laura | We will show that such a device can work as a DW diode, thus extending the operation of DW logic to the AC signal regime. | Session 139: Spin Transport and Spintronics |
| 1923 | The impact of morphology and hybridization on the Dzyaloshinskii-Moryia Interaction | Nembach, Hans | We introduced a Cu dusting layer at a CoFeB/Pt interface to modify the Heisenberg exchange locally. | Session 139: Spin Transport and Spintronics |
| 1924 | Spin Orbit Torque Domain Wall-Magnetic Tunnel Junction Devices and Circuits for In-Memory and Neuromorphic Computing | Alamdar, Mahshid; Leonard, Thomas; Cui, Can; Rimal, Bishweshwor P.; Xue, Lin; Akinola, Otitoaleke; Xiao, Tianyao Patrick; Friedman, Joseph; Bennet, Christopher; Marinella, Matthew; Incorvia, Jean Anne | We propose three-terminal DW-MTJ in-memory computing devices that resolve challenges with traditional DW-MTJs by using perpendicular magnetic anisotropy (PMA) with more robustness to thermal fluctuations than in-plane magnetic anisotropy, spin-orbit torque switching that requires less switching current than spin transfer torque, and an optimized lithography process to produce average device tunnel magnetoresistance TMR = 164%, close to the expected highest TMR seen in PMA MTJs, and resistance-area product RA = 31 Ω.μm 2 , close to the RA of the unpatterned film. | Session 139: Spin Transport and Spintronics |
| 1925 | A Low Energy-Barrier Magnet based Analog Stochastic Neuron | Ganguly, Samiran; Ghosh, Avik | In this work, we propose a compact energy-efficient Analog Stochastic Neuron device built from a low energy-barrier magnetic tunnel junction and a few silicon transistors that can function as a compact drop-in replacement for stochastic sigmoidal neurons in a “software” model of a neural network (NN), allowing building of large scale NN circuits where neurons are first class objects. | Session 139: Spin Transport and Spintronics |
| 1926 | Controlling magnon interaction by a nanoscale dipole switch | Etesamirad, Arezoo; Rodriguez, Rodolfo; Ivanov, Boris; Katine, Jordan; Krivorotov, Ilya; V. Verba, Roman; Tyberkevych, Vasyl; Barsukov, Igor | Here, we propose an approach for controlling magnon scattering by a nanoscale dipole switch. | Session 139: Spin Transport and Spintronics |
| 1927 | Energy dissipation in macroscopic tunnel junctions | Rios E, Leonardo; Patino, Edgar; Govind Kelkar, Neelima | In this work, we show an I-V characterization of a macroscopical high quality tunnel junction of the form Al/Al2O3/Al and its deviation with the theoretical Simmons model for certain voltages. | Session 139: Spin Transport and Spintronics |
| 1928 | Highly efficient spin-orbit torque switching of perpendicular magnetization using topological insulators with a high thermal stability | Pan, Quanjun; Liu, Yuting; Wu, Hao; Zhang, Peng; Huang, Hanshen; Che, Xiaoyu; Wu, Yingying; Dai, Bingqian; Shao, Qiming; Wang, Kang-Lung | In this talk, we will demonstrate the high-quality integration of perpendicularly magnetized FM with TI through a light metal insertion layer and achieved efficient magnetization switching at ambient temperature. | Session 139: Spin Transport and Spintronics |
| 1929 | Resonance-enhanced exchange coupling for voltage-controlled magnetic switching in the scaled magnetic memory device | Sayed, Shehrin; Hsu, Cheng-Hsiang; Roschewsky, Niklas; Yang, See-Hun; Salahuddin, Sayeef | We will discuss a voltage-controlled magnetic tunnel junction that uses a resonant tunneling barrier instead of a single oxide barrier. | Session 139: Spin Transport and Spintronics |
| 1930 | Manipulating Berry curvature of SrRuO3 thin films via epitaxial strain | Liu, Zhiwei; Chen, Hanghui; Tian, Di; Shen, Shengchun; Zhou, Yu; Yu, Pu | In this work, we carry out systemic transport studies and first-principles calculations to investigate the change in AHC of SrRuO3 thin films both under compressive and tensile strains. | Session 139: Spin Transport and Spintronics |
| 1931 | Ultrafast spintronics with terahertz radiation | Kampfrath, Tobias | Ultrafast spintronics with terahertz radiation | Session 139: Spin Transport and Spintronics |
| 1932 | Anomalous normal fluid response in chiral spin-triplet superconductor UTe2 | Bae, Seokjin; Kim, Hyunsoo; Eo, Yun Suk; Ran, Sheng; Liu, I-Lin; Fuhrman, Wesley; Paglione, Johnpierre; Butch, Nicholas; Anlage, Steven | We report evidence of significant surface normal fluid response from a chiral spin-triplet pairing state of UTe 2. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1933 | UTe2: a nearly insulating half-filled j=5/2, 5f3 heavy fermion metal. | Shick, Alexander; Fujimori, Shin-ichi; Pickett, Warren | Correlated band theory implemented as a combination of density functional theory with exact diagonalization of the Anderson impurity model [DFT+U(ED)] is applied to UTe 2. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1934 | Spontaneous Nernst effect in the iron-based superconductor Fe1+yTe1-xSex | Chen, Lu; Xiang, Ziji; Tinsman, Colin; Lei, Bin; Chen, Xianhui; Gu, Genda; Li, Lu | We present a study of the Nernst effect in an iron-based superconductor with a nontrivial band topology Fe 1+yTe 1-xSe x . | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1935 | Yu-Shiba-Rusinov states and chiral Majorana modes on an iron-based superconductor with a surface Dirac cone | Chiu, Ching-Kai; Wang, Ziqiang | To establish the connection between Shiba and Majorana physics, we study the low-energy physics of the magnetic impurities on the surface of FeTexSe1−x with a Dirac cone. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1936 | Topological transitions in a model for proximity-induced superconductivity | Batra, Navketan; Nayak, Swagatam; Kumar, Sanjeev | Using a prototype model for proximity-induced superconductivity on a bilayer square lattice, we show that interlayer tunneling can drive change in topology of the Bogoliubov quasiparticle bands. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1937 | Variation in LDOS for the Dirac surface states due to Se/Te composition fluctuations in FeTe0.55Se0.45 | Barik, Tamoghna; Sau, Jay | With a minimal model for 3D strong TI, we tune the parameters to match the ARPES band structure and introduce disorder in the topology controlling parameter with correlation length of Te/Se density in-homogeneity. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1938 | Observation of magnetic adatom-induced Majorana vortex and its fusion with field-induced Majorana vortex in an iron-based superconductor | Fan, Peng; Yang, Fazhi; Qian, Guojian; Chen, Hui; Zhang, Yu-Yang; Li, Geng; Huang, Zihao; Xing, Yuqing; Kong, Lingyuan; Liu, Wenyao; Jiang, Kun; Shen, Chengmin; Du, Shixuan; Schneeloch, John; Zhong, Ruidan; Gu, Genda; Wang, Ziqiang; Ding, Hong; Gao, Hongjun | Here we report the observation of the proposed quantum anomalous vortex with integer quantized vortex core states and Majorana zero mode induced by magnetic Fe adatoms deposited on the surface and the realization of its fusion with a nearby field-induced Majorana vortex in iron-based superconductor FeTe 0.55Se 0.45. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1939 | Local imaging of Thermal, magnetic and superconducting signals in FeTe1-xSex | Frenkel, Yiftach; Zhang, Charles; Tschirhart, Charles; Gray, Mason; Potts, Alex; Cohen, Liam; Young, Andrea | Here we present local images of the magnetic and superconducting landscapes of a thin superconducting FTS flake. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1940 | Boundary-Obstructed Topological High-Tc Superconductivity in Iron Pnictides | Liu, Chaoxing; Wu, Xianxin; Benalcazar, Wladimir; Li, Yinxiang; Thomale, Ronny; Hu, Jiangping | In this work, we will describe an example of such system in iron-based superconductors. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1941 | Method for Readout of Majorana Parity in Topological Superconductors Using Magnetic Force Microscopy | November, Benjamin; Sau, Jay; Williams, James; Hoffman, Jenny | By applying a surface Fu-Kane model, we numerically calculate the wavefunction solution to the Bogoliubov-de Gennes equation for both a pair of spatially separated single vortices and the double vortex limit of complete overlap. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1942 | Coexistence of high-temperature superconductivity and nontrivial topology in two-dimensional cobalt pnictide monolayers on SrTiO3 | Gao, Jiaqing; Ding, Wenjun; Zhang, Shunhong; Zhang, Zhenyu; Cui, Ping | More strikingly, our further analyses show that all these four Co X monolayers possess nontrivial topological properties characterized by band inversions, odd Z 2 invariants, and exhibition of topological edge states either in freestanding form or supported on SrTiO 3. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1943 | Magnetic, superconducting, and topological surface states on Fe1+yTe1−xSex | Li, Yangmu; Zaki, Nader; Fobes, David; Xu, Zhijun; Gu, Genda; Hu, Rongwei; Petrovic, Cedomir; Savici, Andrei; Garlea, Vasile; Johnson, Peter; Tranquada, John; Zaliznyak, Igor | Here, we combine neutron scattering, angle-resolved photoemission spectroscopy, and microprobe composition and resistivity measurements to characterize the electronic state of Fe 1+yTe 1−xSe x. | Session 140: Topological Superconductivity: Pnictides and Heavy Fermion Materials |
| 1944 | Ultrafast and non-linear optical studies of multiferroic BaTiO3-BiFeO3 and heterostructures based on ferroelectric Pb 0.52 Zr 0.48 TiO 3 | Herath Mudiyanselage, Rathsara; Magill, Brenden; Holleman, Jade; McGill, Stephen; Kang, Han-Byul; Kang, Min Gyu; Priya, Shashank; Stanton, Christopher; Khodaparast, Giti | In our work, we focused on probing ultrafast dynamics and nonlinear light-matter interactions in these structures. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1945 | Ferroelectric switching in the Aurivillius phase oxide SrBi2Ta2O9 from first principles | Pokhrel, Nabaraj; Nowadnick, Elizabeth | Here, we use density functional theory calculations and group theoretic analysis to explore symmetry-distinct intrinsic ferroelectric switching pathways of SrBi 2Ta 2O 9. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1946 | Giant Linear Magnetoelectric Effect at the Morphotropic Phase Boundary of Epitaxial Sr0.5Ba0.5MnO3 films | Bayaraa, Temuujin; Yang, Yurong; Ye, Meng; Bellaiche, Laurent | In this work, first-principles calculations are conducted to compute linear magnetoelectric coupling coefficients in epitaxial (001) Sr 0.5Ba 0.5MnO 3 films. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1947 | Pressure-induced metal-insulator transition in oxygen-deficient ferroelectrics | Xia, Chengliang; Chen, Yue; Chen, Hanghui | Our work shows that for LiNbO 3-type strong ferroelectrics, combining oxygen vacancies and pressure can lead to new phenomena and potential functions, in contrast to the harmful effects occurring to perovskite ferroelectric oxides such as BaTiO 3. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1948 | Optical and structural properties of type-II multiferroic candidates RbFe(AMO4)2 (A = Mo, Se, S) | Owen, Rachel; Drueke, Elizabeth; Albunio, Charlotte; Kaczmarek, Austin; Jin, Wencan; Obeysekera, Dimuthu; Cheong, Sang-Wook; Yang, Junjie; Cundiff, Steven; Zhao, Liuyan | Motivated by the search for type-II multiferroics, we present an optical study of a complex oxide family of type-II multiferroic candidates: RbFe(MoO 4) 2, RbFe(SeO 4) 2, and RbFe(SO 4) 2. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1949 | Magnetocapacitance Effect and Magnetoelectric Coupling in Type-II Multiferroic HoFeWO6 | Adnani Takantapeh, Moein; Gooch, Melissa; Deng, Liangzi; Agrestini, Stefano; Herrero-Martín, Javier; Wu, Hung-Cheng; Chang, Chung-Kai; Salavati-fard, Taha; Poudel, Narayan; García-Muñoz, José Luis; Daneshmandi, Samira; Wu, Zheng; Grabow, Lars; Lai, Yen-Chung; Yang, Hung-Duen; Pellegrin, Eric; Chu, Paul C. W. | We have studied the magnetocapacitance (MC) effect and magnetoelectric (ME) coupling in HoFeWO 6, a type-II multiferroic with an onset of electric polarization and an antiferromagnetic (AFM) ordering at the Neel temperature (T N) of 17.8 K. With a polar structure at room temperature, our X-ray diffraction measurements did not show any structural phase transition across T N, consistent with our density functional theory calculations. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1950 | Unconventional ferroelectricity from competing states in perovskites | Kotiuga, Michele | Using this methodology, I will briefly present a medium-throughput study of a number of perovskites. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1951 | Unique and unusual properties of layered ferrielectric CuInP2S6 – II. Experimental | Neumayer, Sabine; Tao, Lei; Brehm, John; O’Hara, Andrew; Si, Mengwei; Liao, Pai-Ying; Ye, Peide (Peter); McGuire, Michael; Susner, Michael; Pantelides, Sokrates; Maksymovych, Petro; Balke, Nina | Unique and unusual properties of layered ferrielectric CuInP2S6 – II. Experimental | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1952 | Unique and unusual properties of layered ferrielectric CuInP2S6 – I. Theory | Tao, Lei; Neumayer, Sabine; O’Hara, Andrew; Brehm, John; Maksymovych, Petro; Balke, Nina; Pantelides, Sokrates | By combining density-functional-theory calculations and piezoelectric-force-microscopy experiments (next abstract by S. Neumayer et al.), we demonstrate that CIPS features a quadruple-well potential with four polarization states, corresponing 1 to Cu atoms displacing within or just outside the CIPS layers. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1953 | Influence of Polarization, Strain, and Doping on the Magnetoelectric Properties of LSMO/PZT Interfaces: An Ab Initio Study | Acharya, Krishna; Vasiliev, Igor | We apply ab initio methods based on density functional theory to study the influence of polarization, strain, and doping on the magnetoelectric coupling at the (0,0,1) interface between PZT (PbZr0.2Ti0.8O3) and LSMO at three different doping levels (La0.8Sr0.2MnO3, La0.67Sr0.33MnO3, and La0.5Sr0.5MnO3). | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1954 | The Effect of Charge Doping on the Phase Stability and Polarization of Binary Oxide Ferroelectrics | Cao, Tengfei; Mishra, Rohan | We will present how the additional charges are accommodated in the structure, and their coupling with the polar and non-polar distortion modes. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1955 | Studying the Ferroelectric Domain Memory-Dependent Evolutions in Multiferroic BTO/CFO Janus Nanofibers Exploiting a Magnetic Field | Arash, Saba; Chavez, Bryan; Bauer, Matthew; Andrew, Jennifer; Crawford, Thomas; Wu, Yanwen | In this work to further explore this behavior, the ferroelectric domains are optically observed in BTO/CFO Janus nanofibers using magnetic polarization resolved second harmonic generation measurement technique. | Session 141: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 1 |
| 1956 | Reversal mechanisms in cylindrical magnetic nanowires | Stadler, Bethanie | Reversal mechanisms in cylindrical magnetic nanowires | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1957 | Strain Mediated Magneto-Electric Effects in coaxial nanofibers of Y or W type hexagonal ferrites and ferroelectric PZT or Barium Titanate | Liu, Ying; Zhang, Wei; Srinivasan, Gopalan | Strain Mediated Magneto-Electric Effects in coaxial nanofibers of Y or W type hexagonal ferrites and ferroelectric PZT or Barium Titanate | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1958 | Spin Distributions in Fe3O4@CoxZn1-xFe2O4 Core-Shell Nanoparticles | Kons, Corisa; Attanayake, Supun; Krycka, Kathryn; Borchers, Julie; Das, Raja; Phan, Manh-Huong; Srikanth, Hariharan; Arena, Dario | In this work, CS MNPS consisting of an Fe 3O 4 core and a Zn-doped CoFe 2O 4 shell are studied with polarization analyzed small angle neutron scattering (SANS) in order to explore magnetic properties and spin coupling as a function of doping concentration. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1959 | Disorder Dissipation in Superparamagnetic Nanoparticle Chains Assembled in a Rotating Magnetic Field | Robinson, Hans; He, Zhixing | Theories applicable to both limits qualitatively describe the observed chain length distribution, except that chains are significantly shorter than in either limit. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1960 | Exploiting Spin Interaction in Magnetic Nanoparticles to Improve Magnetic Thermosensitivity and AC Field Response | Biacchi, Adam; Bui, Thinh; De Lima Correa, Eduardo; Dennis, Cindi; Woods, Solomon; Hight Walker, Angela | The technique employs MNPs to measure and image temperature remotely with high spatial resolution throughout a 3D volume. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1961 | Magnetic Microparticle Transport on Disk Arrays in Time-Varying Magnetic Fields: Simulation and Experiment | Vieira, Gregory; Hoang, Chris; Howard, Eliza | Our model predicts limitations to particle speed due to phase-slipping motion, describes how transport depends on particle size, and suggests a means for estimating low-field magnetic susceptibilities of individual particles. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1962 | Magnetic Neutron Scattering of Nanoparticles: Failure of The Superspin Model | SINAGA, Evelyn; Vivas, Laura; Hasdeo, Eddwi; Bender, Philipp; Michels, Andreas | It is known that beyond a certain size magnetic nanoparticles exhibit a nonuniform internal spin structure.This feature, which is of relevance for many problems of practical interest (e.g., biomedical imaging and drug delivery), is commonly ignored when it comes to the analysis of magnetic neutron scattering data on nanoparticle ensembles.By means of numerical micromagnetic computations we study the transition from single-domain to multi-domain behavior in nanoparticles and its implications for the ensuing elastic magnetic small-angle neutron scattering (SANS) cross-section. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1963 | Emergence of Magnetic Field-Modulated Negative Magnetoresistance in Manganese Phosphide Nanorod Thin Films | Muchharla, Baleeswaraiah; Madhogaria, Richa; Hung, Chang-Ming; Duong, Anh; Pham, Huy; Witanachchi, Sarath; Phan, Manh-Huong | Here we report the temperature dependent charge and spin transport properties of a MnP nanorod thin film over a wide temperature range (2 K < T < 350 K). | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1964 | Effect of Demagnetization Technique on Remanence Measurements in Metallic Ferromagnets | Freedberg, Jennifer; Dahlberg, E. Dan | Effect of Demagnetization Technique on Remanence Measurements in Metallic Ferromagnets | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1965 | Structure and Magnetism of Fe/Fe3C Nanoparticles in Carbon Spheres | Gyulasaryan, Harutyun; Papadopoulou, Elisavet; Tetos, Nikolaos; Chilingaryan, Gayane; Spasova, Marina; Farle, Michael; Manukyan, Aram; Myrovali, Eirini; Angelakeris, Makis; Castillo, Kevin; Bernal, Oscar; Kocharian, Armen | Structure and Magnetism of Fe/Fe3C Nanoparticles in Carbon Spheres | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1966 | Altering Magnetic Properties of Iron Filament PLA Using Magnetic Field Assisted Additive Manufacturing Lauren Henderson1, Tanjina N. Ahmed2, Camila Belduque3, Jitendra Tate2,3, Maggie Chen2,4 and Wilhelmus J. Geerts1,2 1. Depart | Henderson, Lauren; Ahmed, Tanjina; Belduque, Maria Camila; Tate, Jitendra; Chen, Maggie; Geerts, Wilhelmus | In this research, the magnetic properties of 3D samples printed in a magnetic field were explored, referred to as Magnetic Field Assisted Additive Manufacturing (MFAAM), where a magnetic field is applied to a material during printing. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1967 | Demonstration of additively manufactured NdFeB PPS Halbach magnets to generate variable magnetic fields for neutron reflectometry | Lamichhane, Tej; Charlton, Timothy; Andrews, Brian; Pathak, Arjun; Doucet, M.; Lauter, Valeria; Katsaras, John; Post, Brian; Paranthaman, Mariappan | We utilized the fused deposition modeling-based Big Area Additive Manufacturing technology to print customized, compensated concentric Halbach array discs, using polyphenylene sulfide -bonded NdFeB permanent magnets for polarized neutron reflectometry. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1968 | Torque measurements of Strontium Ferrite/PA12 composite filaments and 3D printed samples printed in a magnetic field | Ahmed, Tanjina Nasreen; Belduque, Maria Camila; Tate, Jitendra; Geerts, Wilhelmus | In this study, magnetic filaments are made by adding 5wt% and 26wt% of SrO(Fe 2O 3) 6 powders into Nylon-12 using a co-rotating twin-screw extruder. | Session 142: Magnetic Structures: Nanowires, Nanoparticles & Additive Manufacturing |
| 1969 | Spin Echo and Coherence Time of Cr7Mn Nanomagnet | Chen, Guanchu; Joshi, Gajadhar; Logan, James; Sava, Daniel; Timco, Grigore; Winpenny, Richard; Friedman, Jonathan | We measured T 2 and observed it to peak around zero field. | Session 143: Molecular Magnets |
| 1970 | Magneto-elastic coupling in multiferroic metal-organic framework [(CH3)2NH2]Co(HCOO)3 | Thirunavukkuarasu, Komalavalli; Richardson, Rachael; Lu, Zhengguang; Combs, Nicholas; Huang, Nan; Pokharel, Ganesh; Smirnov, Dmitry; Mandrus, David | In the infrared studies under applied magnetic fields, it was concluded that Co complex adopts a different mechanism for facilitating saturation of magnetic states by involving formate stretching distortions unlike other complexes in the family that use the formate bending mode [Inorg. | Session 143: Molecular Magnets |
| 1971 | Molecular Approaches to Magnetic Relaxation in Noisy, Magnetic Environments | Zadrozny, Joseph | In this talk, I will discuss our lab’s recent results in studying the environmental sensitivity of electron and nuclear spin dynamics in magnetic molecules. | Session 143: Molecular Magnets |
| 1972 | Information and decoherence in muon-fluorine coupled systems | Blundell, Stephen; Wilkinson, John | We have developed a method [1] to model this problem and account for our experimental data in a variety of fluorides without resorting to phenomenological stretched exponential functions that have been used in most previous treatments. | Session 143: Molecular Magnets |
| 1973 | Topologically protected ground state degeneracies in an interacting two-spin system | Frank, György; Palyi, Andras; Scherübl, Zoltán; Csonka, Szabolcs; Zaránd, Gergely | We theoretically study geometrical and topological aspects of a simple, yet experimentally relevant quantum magnet: two localized interacting electrons subject to spin-orbit coupling [1]. | Session 143: Molecular Magnets |
| 1974 | Coherence Time Enhancement in the [VO(TPP)] Molecular Nanomagnet | Sheehan, Brendan; Santanni, Fabio; Chen, Guanchu; Joshi, Gajadhar; Sorace, Lorenzo; Sessoli, Roberta; Friedman, Jonathan | 1 Here, we investigate its behavior in the microwave regime with continuous wave (cw) and pulsed electron-spin resonance (ESR) techniques, using a homebuilt ESR spectrometer. | Session 143: Molecular Magnets |
| 1975 | A Fast, Clock-Transition-Protected CNOT Gate with Molecular Nanomagnet Dimers | Gardner, Alexander; Collett, Charles | In this research, the scheme is purely active, the transition coming from a single RF pulse and so will be significantly faster. | Session 143: Molecular Magnets |
| 1976 | Jahn-Teller Solid, Liquid and Gas spin Spin-crossover System Mn(taa) | Yu, Jie-Xiang; Chen, Dian-Teng; Gu, Jie; Chen, Jia; Jiang, Jun; Zhang, Long; Yu, Yue; Zhang, Xiaoguang; Zapf, Vivien; Cheng, Hai-Ping | Here, we investigated the microscopic origin of the phase transition and magnetoelectric coupling in spin-crossover system Mn(taa) via first-principles and Monte Carlo simulation. | Session 143: Molecular Magnets |
| 1977 | Molecular approaches to next-generation magnetic materials at the nanoscale | Christou, George | This talk will describe the synthesis and structures of this class of new molecular metal oxide systems, together with an analysis of their magnetic properties by a variety of physical and spectroscopic methods. | Session 143: Molecular Magnets |
| 1978 | Accessing the effect of support on the electronic structure of Fe[qsal(2,4-diterbutyl)]2 Spin crossover molecule: A First-Principles Study | Jiang, Tao; Le, Duy; Rahman, Talat | Applying density functional theory calculations to the SCO molecule Fe[qsal(2,4-diterbutyl)] 2 adsorbed on Au(111), graphene, and hexagonal boron nitride ( h-BN), we showed a contrast in the influence of the substrate on electronic structure and magnetic properties of the molecule. | Session 143: Molecular Magnets |
| 1979 | Sum-frequency excitation of coherent magnons | Wang, Derek; Juraschek, Dominik; Narang, Prineha | Here, we describe mechanisms by which the sum-frequency components of the driving field can be used. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1980 | Impact of intrinsic defects on ferroelectric polarization in YFeO3 | Klyukin, Konstantin; Ning, Shuai; Ross, Caroline; Yildiz, Bilge | In this work, we investigate a variety of intrinsic defects in YFO by means of DFT calculations and the Berry phase approach. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1981 | Origin of antiferroelectricity in NaNbO3 | Hadaeghi, Niloofar; Zhang, Hongbin | To figure out the origin of antiferroelectricity in NaNbO 3, we performed in-depth investigation combining symmetry analysis and density functional theory (DFT) calculation. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1982 | Prediction of exotic magnetic states in quasi-one-dimensional iron selenide compound Na2FeSe2 | pandey, bradraj; Lin, Ling-Fang; Soni, Rahul; Kaushal, Nitin; Herbrych, Jacek; Alvarez, Gonzalo; Dagotto, Elbio | Motivated by recent progress in preparing alkali-metal compounds, we present the magnetic and electronic phase diagram of the quasi-one-dimensional alkali metal iron selenide Na 2FeSe 2 . | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1983 | Phonon Anharmonicity in Tunable Quantum Paraelectrics | He, Xing; Bansal, Dipanshu; Abernathy, Douglas; Winn, Barry; Chi, Songxue; Boatner, Lynn; Delaire, Olivier | We used inelastic neutron scattering and first-principle simulations to probe the temperature, electric field, and doping effects on phonons in SrTiO3 and KTaO3. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1984 | Amorphous to crystal phase transition for organic ferroelectrics revealed by in situ hysteresis loop measurements. | Yuan, Yifan; Xu, Xiaoshan | Amorphous to crystal phase transition for organic ferroelectrics revealed by in situ hysteresis loop measurements. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1985 | Domain fluctuations in a ferroelectric low-strain BaTiO3 thin film | Li, Jianheng; Zhong, Louie; Jangid, Rahul; Meera, FNU; Rippy, Geoffery; Ainslie, Kenneth; Kohne, Chris; Everhardt, Arnoud; Noheda, Beatriz; Zhang, Yugang; Fluerasu, Andrei; Matzen, Sylvia; Kukreja, Roopali | In this study, we utilized X-ray photon correlation spectroscopy to probe ordered a/c domain dynamics and fluctuations across a/b to a/c domain transformation and Curie temperature. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1986 | Designing layered two dimensional Van der Waals multiferroics and polar metals | M. J., Swamynadhan; Ghosh, Saurabh | We have employed first-principles density functional theory calculations to investigate the electric, magnetic and electronic properties of ABP 2S 6 (A = Cu, Ni; B = Cr, Mn) two dimensional (2D) transition metal phosphorous chalcogenides (TMPC). | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1987 | Hexagonal ABC polar metals from first principles | Genser, Konrad; Rabe, Karin | In this work, we study the structural energetics and band structures of real and hypothetical hexagonal ABC intermetallic phases, using first principles calculations to determine the structural parameters and the bands in each phase. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1988 | Role of structure, energetics, and electronic structure in determining the pressure response of octahedral rotations in Ruddlesden-Popper layered perovskites | Poyyapakkam Ramkumar, Sriram; Nowadnick, Elizabeth | In this work, we use a combination of group theoretic analysis, density functional theory calculations, and Landau free energy expansions to explore how octahedral rotations in a family of A 3B 2O 7 RP materials respond to applied pressure. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1989 | Thermal expansion in Ruddlesden-Popper and perovskite sulfides | Koocher, Nathan; Rondinelli, James | Here, we analyze structural lattice dynamical, and thermodynamic properties of d 0 Ruddlesden-Popper and perovskite sulfides using the self-consistent quasi-harmonic approximation with density functional theory. | Session 144: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics – 2 |
| 1990 | Topological phase transition in polar skyrmions: a perspective from second principles simulations | Gonçalves, Mauro; Gómez-Ortiz, Fernando; Garcia-Fernandez, Pablo; Iniguez, Jorge; Junquera, Javier | We show a reversible phase transition from the skyrmion state to a trivial uniform ferroelectric state, accompanied by large tunability of the dielectric permittivity 5. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1991 | Emergent topological phase transition dynamics of polar skyrmions | Donoway, Elizabeth; Shao, Yu-Tsun; Das, Sujit; hong, zijian; Caretta, Lucas; McCarter, Margaret; Muller, David; Ramesh, Ramamoorthy | I will discuss several emerging techniques we have employed to examine the interplay between emergent phenomena—namely topology, ordering, and chirality—and extrinsic parameters, to describe the topological phase diagram and phenomenology of polar oxide superlattices. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1992 | Chiral polar textures probed with resonant X-ray diffraction | McCarter, Margaret; Klewe, Christoph; Donoway, Elizabeth; Das, Sujit; Stoica, Vladimir; Lee, Dong Ryeol; Freeland, John; Shafer, Padraic; Van der Laan, Gerrit; Ramesh, Ramamoorthy | I will discuss the non-uniform polar vortices and skyrmions that occur in (PbTiO3)/(SrTiO3) heterostructures, and how scattering studies at the Ti L-edges can be used to understand their 3-dimensional, chiral structures. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1993 | Optical creation of a supercrystal with nanoscale periodicity | Gopalan, Venkatraman; Stoica, Vladimir; Laanait, Nouamane; dai, cheng; hong, zijian; yuan, yakun; Martin, Lane; Ramesh, Ramamoorthy; Chen, Long-Qing; Wen, Haidan; Freeland, John | By adjusting only dielectric properties, the phase-field model describes this emergent phase as a photo-induced charge-stabilized supercrystal formed from a two-phase equilibrium state. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1994 | Polar distortions and electron states in Sc-doped ZnSnO3 from first principles | Wang, Limin; Rabe, Karin | Using first-principles methods, we investigate the crystal structure and electron states in ZnSnO3 and Sc-doped ZnSnO3 to explore the effects of Sc doping, with a focus on the change in polar distortion and the predicted conductivity of the doped polar system. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1995 | Reversal of Tunneling Electroresistance in Ferroelectric Tunnel Junctions by Interface Engineering | Li, Ming; Tao, Lingling; Tsymbal, Evgeny | Using density functional theory calculations, we demonstrate that the sign of TER in a La 1-xSr xMnO 3/BaTiO 3/Pt FTJ depends on the interface termination, either La 1-xSr xO/TiO 2 or MnO 2/BaO. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1996 | Topological Order Parameters in Oxides | Griffin, Sinead | In this talk, I will discuss how the conventional order parameters in oxides such as ferroelectric mode distortions and octahedral rotations can be used tune topological order. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1997 | Lattice Modes and Polarization Switching in Charge-Order-Driven Ferroelectrics | Qi, Yubo; Rabe, Karin | In this work, we use first-principles methods to investigate the ferroelectricity in SrVO 3-LaVO 3 superlattices, and demonstrate that the coupling of the charge order to the lattice has a crucial influence on the stabilities of various polar and nonpolar charge-ordered states. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1998 | Emergent Z2 topological phases in (001) oxide superlattices | Liu, Hongquan; Ma, Jiaji; Li, Gang; Chen, Hanghui | In this work, we combine first-principle calculations and model analysis to show that, in a number of (001) ( ABO 3) 1/( AB’O 3) 1 oxide superlattices, a proper band alignment can induce a parity inversion between B- d and B’- d states. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 1999 | Ferroelectric domain studies in free-standing PbZr0.2Ti0.8O3 membranes | Wu, Qiuchen; Wang, Kun; Li, Dawei; Hong, Xia | We report a comprehensive ferroelectric domain study of free-standing PbZr 0.2Ti 0.8O 3 (PZT) and PZT/(La,Sr)MnO 3 (LSMO) membranes. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 2000 | Berezinskii– Kosterlitz–Thouless phase transitions in PbTiO$_3$/SrTiO$_3$ superlattices | Gómez-Ortiz, Fernando; Garcia-Fernandez, Pablo; Junquera, Javier | Using second-principles methods as implemented in the SCALE-UP code [4] we study the possibility of finding these type of transitions in PbTiO$_3$/SrTiO$_3$ superlattices when the order parameter is allowed to escape to the third dimension forming vortices in the polar structures [5]. | Session 145: Topological Phenomena and Ferroelectric Oxide Interfaces |
| 2001 | Probing ultrahigh magneto-optical properties and time-resolved spin dynamics in InAsP ternary alloys | Thapa, Sunil; Stanton, Christopher; Magill, Brenden; Herath Mudiyanselage, Rathsara; Khodaparast, Giti; Matsuda, Yasuhiro; Yang, Zhuo; Kohama, Yoshimitsu; Choi, Sukgeun; Palmstrom, Chris | We present a room temperature cyclotron resonance (CR) study of n-type InAs xP 1−x (x=0.07,0.34) films in ultrahigh magnetic fields in the Faraday’s geometry. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2002 | Ultrafast Spin-Lasers | Jung, Natalie; Lindemann, Markus; Pusch, Tobias; Michalzik, Rainer; Hofmann, Martin; Gerhardt, Nils | Here, we review recent results on ultrafast spin-lasers for the next generation of optical communication systems. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2003 | Birefringent Spin-Lasers | Cao, David; 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[4]. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2004 | Spin lasers as coupled harmonic oscillators | Labinac, Velimir; Xu, Gaofeng; Cao, David; Zutic, Igor | By linearizing these equations and using a small signal analysis we find that the modulation of the intensity or polarization of the emitted light can be effectively represented by the two weakly-coupled harmonic oscillators of different resonant frequencies. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2005 | Rate-equations description of spin lasers | Patel, Krish; Xu, Gaofeng; Zutic, Igor | We apply a nonlinear gain model based on accurate electronic structure calculations to develop a more general description of spin lasers and reveal the effects of such a nonlinear gain model on the dynamics of spin lasers. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2006 | Electronic transport in quantum InSb nanowire spin-valve devices | Yang, Zedong; Heischmidt, Brett; Gazibegovic, Sasa; Badawy, Ghada; Car, Diana; Crowell, Paul; Bakkers, Erik; Pribiag, Vlad | We find that the transport is phase-coherent and, for contact spacings of a few hundred nanometers, also quasi-ballistic 1. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2007 | Electric field control of photoluminescence polarization in Ge/SiGe quantum wells | Rossi, Simone; Talamas Simola, Enrico; Isella, Giovanni; Pezzoli, Fabio | In this work we present a polarization-resolved photoluminescence study in a cylindrical p-i-n diode where the intrinsic region of the device consists of Ge QWs in Si 0.15Ge 0.85 barriers. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2008 | Magneto-optical investigation of spin and carrier kinetics in Ge1-xSnx/Ge heterostructures | Vitiello, Elisa; Rossi, Simone; Broderick, Christopher; Gravina, Giorgio; Balocchi, Andrea; Marie, Xavier; O’Reilly, Eoin; Myronov, Maksym; Pezzoli, Fabio | We specifically apply optical spin orientation combined with a magneto-optical analysis of the radiative emission to demonstrate coherent spin dynamics through quantum beat spectroscopy 2 and sub-ns carrier kinetics through the Hanle effect 3. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2009 | Optical injection of spin current in direct bandgap group IV semiconductors | Fettu, Gabriel; Sipe, John; Moutanabbir, Oussama | Here we exploit recent progress in group IV bandgap engineering to investigate the optical processes of spin current injection in a silicon-compatible platform. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2010 | Magneto-Optical and Magneto-Transport Studies 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, Yasuhiro; Yang, Zhuo; Kohama, Yoshimitsu | In this talk, we present a combined magneto-optical, magneto-transport, and theoretical approach to study the band structure of these QWs. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2011 | Dynamic Nuclear Polarization and Nuclear-Induced Frequency Focusing in Gallium Arsenide under periodic optical electron spin pumping | Dominguez, Michael; Iafrate, Joseph; Sih, Vanessa | The observation of nuclear-induced frequency focusing and its dependence on pump wavelength is corroborated by numerical calculations using a model incorporating optical orientation and the optical Stark effect (Phys. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2012 | Observation of carrier concentration dependent spintronic terahertz emission from n-GaN/NiFe heterostructures | Vetter, Eric; Biliroglu, Melike; Seyitliyev, Dovletgeldi; Reddy, Pramod; Kirste, Ronny; Sitar, Zlatko; Collazo, Ramon; Gundogdu, Kenan; Sun, Dali | We found that the amplitude of THz emission strongly depends on the carrier concentration of the semiconductor layer, which could be attributed to the tunable Rashba state occurring at the n-GaN/ferromagnet interface. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2013 | SiGe Spintronic Devices with High-k Dielectric Gates | DeMell, Jennifer; Stephen, Gregory; Gaspe, Chomani; Richardson, Christopher; Friedman, Adam | We present magnetotransport results for both the charge- and spin-based devices from 3 K – 300 K at fields up to 2.5 T and compare these results for multiple samples. | Session 146: Semiconductor Spintronics: Optics and Devices |
| 2014 | Non-collinear magnetism and zero-field skyrmions in all-light-metal multilayers | Lo Conte, Roberto; Nandy, Ashis; Chen, Gong; Cauduro, Andre; Maity, Ajanta; Ophus, Colin; Chen, Zhijie; N’Diaye, Alpha; Yang, Hongxin; Liu, Kai; Schmid, Andreas; Wiesendanger, Roland | Subsequently, I will discuss how such systems can be employed for the stabilization of isolated magnetic skyrmions at room temperature and zero magnetic field via interlayer exchange coupling (IEC) [4,5]. | Session 147: Skyrmions in Two Dimensional Systems |
| 2015 | Isolated zero-field magnetic skyrmions in heterogeneous multilayer films stabilized by interlayer exchange coupling | Chen, Xiaoye; Tai, Tommy; Tan, Hui Ru; Tan, Hang Khume; Cheng, Xuan Min; Ho, Pin; Soumyanarayanan, Anjan | In this work, we design heterogeneous multilayers with two adjoining functional stacks with tunable interlayer exchange coupling (IEC) 4,5. | Session 147: Skyrmions in Two Dimensional Systems |
| 2016 | Properties of skyrmions in Co/Pt-based multilayers from theory | Jia, Hongying; Hoffmann, Markus; Bihlmayer, Gustav; Bluegel, Stefan | We investigate the prospects for stable, compact 10 nm sized skyrmions in ferromagneically and antiferromagneticially coupled Co/Pt-based multilayers from first-principles calculation of the spin-stiffness, the Dzyaloshinskii-Moriya interaction (DMI), magnetic anisotropy and the interlayer coupling. | Session 147: Skyrmions in Two Dimensional Systems |
| 2017 | Tunable Dzyaloshinskii-Moriya Interaction in Ferrimagnetic GdCo alloy through Interface Engineering | Morshed, Md Golam; Khoo, Khoong Hong; Quessab, Yassine; XU, Jun-Wen; Laskowski, Robert; Balachandran, Prasanna; Kent, Andrew; Ghosh, Avik | We present a systematic analysis of the DMI variation in ferrimagnetic Pt/GdCo/Pt 1-xW x multilayer as a function of Tungsten (W) composition (x) using Density Functional Theory (DFT). | Session 147: Skyrmions in Two Dimensional Systems |
| 2018 | Topological magnetic states of Fe3GeTe2 from first-principles-based effective Hamitonian | Xu, Changsong; Li, Xueyang; Chen, Peng; Zhang, Yun; Xiang, Hongjun; Bellaiche, Laurent; Hu, Jin; Churchill, Hugh; Li, Yue; Phatak, Charudatta | Here we perform theoretical studies and report our newly developed first-principles-based effective Hamiltonian, which not only reproduces the complex topological states in Fe 3GeTe 2, but also sheds light on the elusive topics. | Session 147: Skyrmions in Two Dimensional Systems |
| 2019 | Meron-Like Topological Spin Defects in Monolayer CrCl3 | Lu, Xiaobo; Fei, Ruixiang; Zhu, Linghan; Yang, Li | Employing first-principles and Monte Carlo simulations, we propose that monolayer CrCl 3, can be a promising candidate for observing the vortex/antivortex types of topological defects, so-called merons. | Session 147: Skyrmions in Two Dimensional Systems |
| 2020 | Skyrmions in twisted van der Waals magnets | Akram, Muhammad; Erten, Onur | We find a large region of skyrmion crystal phase when the length scales of the moire periodicity and skyrmions are compatible. | Session 147: Skyrmions in Two Dimensional Systems |
| 2021 | In Pursuit of Antiskyrmions and the Anisotropic Dzyaloshinskii-Moriya Interaction: Structural and Magnetic Characterization of Uniaxial Pt/Co-based C2v Thin Films | Kitcher, Michael D; Mewes, Claudia; Mewes, Tim; De Graef, Marc; Sokalski, Vincent | This work presents C2 v Ag/Pt/Co-based films as potential antiskyrmion hosts. | Session 147: Skyrmions in Two Dimensional Systems |
| 2022 | Ferroelectric control of magnetic skyrmions in two-dimensional van der Waals heterostructures | Huang, Kai; Shao, Ding-Fu; Tsymbal, Evgeny | Here, we predict that the DMI and the related skyrmion behaviors in a Fe 3GeTe 2 monolayer can be controlled by ferroelectric polarization of an adjacent ferroelectric 2D van der Waals In 2Se 3 monolayer. | Session 147: Skyrmions in Two Dimensional Systems |
| 2023 | Emergence of Magnetic Skyrmions in Ferromagnetic Transition Metal Chalcogenides | Ou, Yunbo; Chi, Hang; Nemes, Norbert; Martinez, Jose; Rocci, Mirko; Akey, Austin; Ge, Wenbo; Suri, Dhavala; Wang, Yiping; Burch, Kenneth; Bell, David; Wu, Weida; Moodera, Jagadeesh | Here we report the realization of quasi-2D TMC Cr 2Te 3 down to 1 ML on SrTiO 3 (111) by molecular beam epitaxy (MBE). | Session 147: Skyrmions in Two Dimensional Systems |
| 2024 | Spin filtering and spin separation in 2D materials by topological spin Hall effect | Zadorozhnyi, Andrei; Dahnovsky, Yuri | We propose to study new physical effects based on electron scattering on magnetic skyrmions and vortexes distributed in a 2D ferromagnetic material. | Session 147: Skyrmions in Two Dimensional Systems |
| 2025 | Temperature evolution of skyrmion stability and formation mechanism in chiral multilayers | Chue, Edwin; Chen, Xiaoye; Tan, Hui Ru; Lin, Ming; Kong, Jian Feng; Tan, Hang Khume; Soumyanarayanan, Anjan | In this work, we investigate Ir/Fe/Co/Pt multilayers [2] over temperatures of 100 – 350K using first order reversal curve (FORC) magnetometry [3] and Lorentz transmission electron microscopy (LTEM). | Session 147: Skyrmions in Two Dimensional Systems |
| 2026 | Current-Controlled Nonequilibrium State via Current-tuned Lattice in Calcium Ruthenate | Zhao, Hengdi; Hu, Bing; Ye, Feng; Hoffmann, Christina; Kimchi, Itamar; Cao, Gang | Studying the spin-orbit-coupled antiferromagnet Ca 2RuO 4, and its derivatives with Mn-, Fe-, Rh- and Ir-doping, we find that a small applied electrical current couples to the lattice by significantly reducing its orthorhombicity and octahedral rotations, which in turn concurrently diminishes the 125 K- antiferromagnetic transition and induces a new, orbital order below 80 K. | Session 148: Ruthenates |
| 2027 | Square to trigonal symmetry and itinerant to localized magnetism in ultra-thin SrRuO3 films | Siwakoti, Prahald; Saghayezhian, Mohammad; Wang, Zhen; Howe, David; Ali, Zeeshan; Zhu, Yimei; Zhang, Jiandi | In this work, thin films of SrRuO 3 (SRO) are grown in [001] and [111] direction and their electronic and magnetic properties are investigated as a function of film thickness. | Session 148: Ruthenates |
| 2028 | Mean-field analysis of collective-mode excitations in excitonic magnet Ca2RuO4 | Yamamoto, Shunsuke; Sugimoto, Koudai; Ohta, Yukinori | In the present study, we applied the mean-field and random phase approximations to analyze the collective-mode excitations in the two-dimensional three-orbital Hubbard model for Ca 2RuO 4 derived from ab-initio calculations. | Session 148: Ruthenates |
| 2029 | Understanding the non equilibrium phase transition in Ca2RuO4: heating and Peltier effects | Chiriaco, Giuliano | We investigate the effects of an electric current in a system containing interfaces between metallic and insulating phases using a general model. | Session 148: Ruthenates |
| 2030 | Properties of Quasi-Two-Dimensional Ba7Ru4Cl2O15 and Ba7Ru4Br2O15 | Zheng, Hao; Zhao, Hengdi; Zhang, Yu; Hu, Bing; Schlottmann, Pedro; Cao, Gang | We have systematically studied newly synthesized quasi-two-dimensional Ba 7Ru 4Cl 2O 15 and Ba 7Ru 4Br 2O 15 in single-crystal form. | Session 148: Ruthenates |
| 2031 | Exploring novel states in Ca3Ru2O7 under pressure and strain. | Leon, Andrea; Rosner, Helge | Here, we explore the electronic properties of Ca 3Ru 2O 7 under pressure and strain using density functional theory (DFT). | Session 148: Ruthenates |
| 2032 | Electronic and structural optimisation of compressed Ca2RuO4 | Keen, Harry; Julian, Stephen; Hermann, Andreas | Here, we present a study of the pressure-induced structural and electronic evolution of Ca2RuO4 using DFT+U calculations, which marks the first reported attempt at a fully self-consistent optimisation of Ca2RuO4. | Session 148: Ruthenates |
| 2033 | Negative charge-transfer gap and even parity superconductivity in Sr2RuO4. | Mazumdar, Sumitendra | A comprehensive theory of superconductivity (SC) in Sr2RuO4 must simultaneously explain experiments that suggest even parity superconducting order and others that claim broken time reversal symmetry. | Session 148: Ruthenates |
| 2034 | Controlling electronic and magnetic properties in ruthenate and iridate thin films and heterostructures. | Shen, Kyle | We report our efforts in employing epitaxial strain to manipulate the Fermi surface topology and superconducting transition temperature of the unconventional superconductor Sr2RuO4. | Session 148: Ruthenates |
| 2035 | Critical magnetic fluctuations in the layered ruthenates Ca2RuO4 and Ca3Ru2O7 studied by neutron spectroscopy | Trepka, Heiko; Keller, Thomas; Krautloher, Maximilian; Bertinshaw, Joel; Porras, Juan; Xu, Jianhui; Habicht, Klaus; Boehm, Martin; Schmalzl, Karin; Keimer, Bernhard; Hepting, Matthias | Here we report on high-resolution neutron triple-axis spectroscopy measurements of critical AFM fluctuations in proximity to the Néel temperatures of Ca 2RuO 4, Ca 3Ru 2O 7, and 1% Ti-doped Ca 3Ru 2O 7. | Session 148: Ruthenates |
| 2036 | Berry phase engineering at oxide interfaces | Groenendijk, Dirk; Autieri, Carmine; van Thiel, Thierry; Brzezicki, Wojciech; Hortensius, Jorrit; Afanasiev, Dmytro; Gauquelin, Nicolas; Barone, Paolo; van den Bos, K.W.H.; van Aert, Sandra; Verbeeck, Johan; Filippetti, Alessio; Picozzi, Silvia; Cuoco, Mario; Caviglia, Andrea | Here we show that ultrathin SrRuO3 exhibits spin-polarized topologically nontrivial bands at the Fermi energy. | Session 148: Ruthenates |
| 2037 | Pressure induced insulator to metal crossover in van der Waals ferromagnet CrGeTe3 | Bhoi, Dilip; Zhang, Yufeng; Gouchi, Jun; Hasegawa, Takumi; Ogita, Norio; Kim, Kee Hoon; Uwatoko, Yoshiya | In this work, we have constructed a pressure-temperature electronic phase diagram of CrGeTe 3 based on the magnetic susceptibility, χab, resistivity ρab, and Raman spectroscopy data. | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2038 | Evolution of Structural, Magnetic and Electronic Properties with Pressure in TMPX3 van-der-Waals Compounds | Deng, Shiyu; Artacho, Emilio; Coak, Matthew; Jarvis, David; Hamidov, Hayrullo; Liu, Cheng; Haines, Charles; Pickard, Chris; Wildes, Andrew; Saxena, Siddharth | Our recent studies[1-3] have reported dimensionality crossover related pressure-induced insulator-to-metal transitions and novel magnetic phases. | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2039 | Tuning magnetic and electronic properties in exotic silver(II) fluorides using external pressure and eitaxial strain | Grochala, Wojciech; Grzelak, Adam; Gawraczynski, Jakub; Derzsi, Mariana; Lorenzana, Josee; Yang, Xiaoping; Kurzydlowski, Dominik; Su, Haibin; Struzhkin, Viktor; Prakapenka, Vitali; Mazej, Zoran | Tuning magnetic and electronic properties in exotic silver(II) fluorides using external pressure and eitaxial strain | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2040 | Tuning dimensionality, magnetism and conduction in van-der-Waals Mott insulators | Jarvis, David; Coak, Matthew; Hamidov, Hayrullo; Wildes, Andrew; Paddison, Joseph; Liu, Cheng; Haines, Charles; Deng, Shiyu; Klotz, Stefan; Hansen, Thomas; Kozlenko, Denis; Park, Je-Geun; Saxena, Siddharth | We will present magnetic, structural and electrical transport results and compare the behaviour of Fe-, V-, Mn- and NiPS 3 as we tune them towards 3D structures – and Mott transitions from insulator to metal. | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2041 | 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, including new developments in instrumentation and pressure devices. | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2042 | Hot Hydride Superconductivity above 550 K | Grockowiak, Audrey; Ahart, Muhtar; Helm, Toni; Garbarino, Gaston; Glazyrin, Konstantin; Coniglio, William; kumar, ravhi; Somayazulu, Maddury; Meng, Yue; Oliff, Morgan; Williams, Vaughan; Ashcroft, Neil; Hemley, Russell; Tozer, Stanley | We successfully synthesized a metallic La based superhydride from La metal and NH 3BH 3, and find an initial multi-step transition with a T c of 294K for the highest onset, in line with previous work[1],[2]. | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2043 | Theoretical Predictions of Ternary Hydrides Under Pressure | Geng, Nisha; Wang, Xiaoyu; Bi, Tiange; Redington, Morgan; Zurek, Eva | Inspired by the discovery of high temperature superconductivity in binary hydrides of sulphur and calcium, we considered a number of ternary systems containing these elements. | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2044 | High-pressure phase diagram of ferromagnetic superconductor Eu(Fe0.75Ru0.75)2As2 | Nix, Zachary; Zhao, Jiyong; Alp, Esen; Hu, Michael; Cao, Guang-Han; Bi, Wenli | High-pressure phase diagram of ferromagnetic superconductor Eu(Fe0.75Ru0.75)2As2 | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2045 | Superconductivity in elemental yttrium and yttrium superhydride bulk and film at high pressures | Buhot, Jonathan; Moulding, Owen; Muramatsu, Takaki; Osmond, Israel; Cross, Sam; Lord, Oliver; Friedemann, Sven | Here we demonstrate a new approach to synthesize YH x from an elemental yttrium film directly evaporated on the diamond anvil [1]. | Session 149: Matter in Extreme Environments: Quantum Materials |
| 2046 | Understanding Matter at Superdense and Warm 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 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2047 | Prediction of a temperature-induced phase transition in Mg2GeO4 by first principles | Umemoto, Koichiro; Wentzcovitch, Renata | Here we present a first principles prediction of a temperature-induced phase transition in I-42d-type Mg 2GeO 4, a low-pressure analog [1] of ultrahigh pressure phase of Mg 2SiO 4 [2]. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2048 | Dense and metallic nitric sulfur hydrides | Li, Xiaofeng; Conway, Lewis; Miao, Maosheng; Hermann, Andreas | We identify four stable compositions, two of which, (H 2S)(NH 3) and (H 2S)(NH 3) 4, are stable in a sequence of structures to the Mbar regime. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2049 | Prediction of crystal structures and motifs in the Fe-Mg-O system under Earth’s core pressures | Wang, Renhai; Sun, Yang; Zheng, Feng; Fang, Yimei; Zhang, Feng; Wu, Shunqing; Lin, Zijing; Wang, Cai-Zhuang; Wentzcovitch, Renata; Ho, Kai-Ming | Here, we use the adaptive genetic algorithms (AGA) to search for and study the crystal structure of Fe xMg yO z phases in a wide range of stoichiometries at 200 GPa and 350 GPa. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2050 | Comparison of DFT-based methods for electronic stopping in warm dense aluminum | Kononov, Alina; Hentschel, Thomas; Cangi, Attila; Baczewski, Andrew; Hansen, Stephanie | In this talk, we benchmark AA against TDDFT for the case of electronic stopping of protons in aluminum at solid density and temperatures ranging from 100 K to 10 eV/k B. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2051 | Phase relations in iron monoxides from LDA + Usc calculations | Sun, Yang; Cococcioni, Matteo; Wentzcovitch, Renata | Using the LDA+U sc method, we present calculation phase relations of iron monoxides involving five polytypes in multiple spin-state configurations. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2052 | On High Pressure Ammonium Fluoride, Its Ice Analogues, Hydrates and Hydrides. | Conway, Lewis; Brown, Katherine; Hermann, Andreas; Loveday, John | We therefore explore NH 4F up to 300 GPa by structure searching to compare how far the analogy holds, and report new close packed high-pressure phases of NH 4F that become stable above 80 GPa. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2053 | Spin state and structural stability of ferropericlase up to 3 Mbar | Wan, Tianqi; Sun, Yang; Wentzcovitch, Renata | Here, we present an LDA+U sc study of Fp’s structure and spin state from 200 GPa to 3 TPa and iron concentrations, x Fe, varying from ~3% to ~12%. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2054 | Iron oxide motifs and structures from 0.1 to 3 TPa | Zheng, Feng; Sun, Yang; Wang, Renhai; Fang, Yimei; Zhang, Feng; Wu, Shunqing; Wang, Cai-Zhuang; Wentzcovitch, Renata; Ho, Kai-Ming | In this study, we use the adaptive genetic algorithm (AGA) to investigate the structure of iron oxides throughout a wide range of stoichiometries (0.25 < x O < 0.8) and pressures (P = 0.1, 1.0, and 3.0 TPa). | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2055 | Anharmonic thermodynamic properties of cubic CaSiO3 perovskite from phonon quasiparticles | Zhang, Zhen; Wentzcovitch, Renata | Here we present an ab initio study of the thermodynamic properties of cCaPv over the pressure and temperature range of the lower mantle. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2056 | Prediction of Fe-Mg and Fe-Mg-O compounds at exoplanetary interior pressures | Fang, Yimei; Sun, Yang; Wang, Renhai; Zheng, Feng; Zhang, Feng; Wu, Shunqing; Wang, Cai-Zhuang; Wentzcovitch, Renata; Ho, Kai-Ming | Here, we use the adaptive genetic algorithm (AGA) to predict several unreported stable crystalline phases in the binary Fe-Mg and ternary Fe-Mg-O systems up to pressures at 1 TPa and 3 TPa. | Session 150: Matter in Extreme Environments: Planetary and Geological Materials |
| 2057 | Josephson Junctions in Topological Crystalline Insulators | Williams, James | In this talk I will report on the properties of Josephson junctions fabricated with weak links of the topological crystalline insulator SnTe. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2058 | Searching for ideal topological crystalline insulators and topological superconductors in Pb-Sn-In-Te system | Gu, Genda; Zhong, Ruidan; Schneeloch, John; Li, Qiang; Li, Yangmu; Valla, Tonica; Johnson, Peter; Tranquada, John | We have studied the effect of crystal growth condition, impurity and composition on the bulk electrical conductivity of these single crystals. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2059 | Segmented Fermi surfaces: discovery and applications | Papaj, Michal | In this talk I will discuss the recent discovery of such segmented Fermi surface in Bi 2Te 3 thin films proximitized by the superconductor NbSe 2[1]. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2060 | Quantifying superconducting proximity pairing in topological (Bi1-xSbx)2Te3 films on niobium substrates | Hlevyack, Joseph; Najafzadeh, Sahand; Lin, Meng-Kai; Hashimoto, Takahiro; Nagashima, Tsubaki; Tsuzuki, Akihiro; Fukushima, Akiko; Bareille, Cédric; Tsui, Yen-Chen; Guan, Syu-You; Chen, Wen-Yu; Bai, Yang; Chen, Peng; Liu, Ro-Ya; Li, Yao; Floetotto, David; Avila, José; Mo, Sung-Kwan; Eckstein, James; Chuang, Tien-Ming; Shin, Shik; Okazaki, Kozo; Chiang, Tai-Chang | By employing a novel cleavage-based “flip-chip” technique, we report the fabrication of single-crystalline (Bi 1-xSb x) 2Te 3 thin films ( x = 0 to 1) with predetermined layer thicknesses (2-10 layers) on superconducting Nb. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2061 | Tunneling spectroscopy on Pb thin films on topological insulator Bi2Se3 | Machida, Tadashi; Sugawara, Katsuaki; Kohsaka, Yuhki; Sato, Takafumi; Sasagawa, Takao; Hanaguri, Tetsuo | Here, we performed tunneling spectroscopy on Pb nanoislands grown on Bi 2Se 3 substrates with several doping levels, using a dilution-refrigerator STM [2]. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2062 | A two-dimensional analog of a doped Weyl superconductor | Lo, Chiu Fan Bowen; Po, Hoi Chun; Nevidomskyy, Andriy | Here, we proposed a more general framework for relating the nontrivial band topology of the normal state Hamiltonian with the resulting superconductor within the weak-coupling mean-field description, which encompasses both the nodal and gapped topological cases. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2063 | Three-dimensional time-reversal invariant topological superconductivity in doped chiral topological semimetals | Huang, Yingyi; Jian, Shao-Kai | In this paper, we suggest the recently discovered chiral topological semimetals in space group P2 13 (No. 198), parts of which are superconducting upon doping, can be new candidates of time-reversal-invariant topological superconductors. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2064 | Proximity Effect at the Superconductor-Topological Insulator Interface from First Principles | Park, Kyungwha; Csire, Gabor; Ujfalussy, Balazs | Here we present the proximity-induced SC gap features, quasiparticle spectra, and effective TI pairing potential as a function of film thickness and chemical potential for Bi 2Se 3 films on SC PdTe, by solving the Bogoliubov-de Gennes equations within the screened Korringa-Kohn-Rostoker method in the framework of density-functional theory. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2065 | Topological Monopole Superconductivity in Magnetically Doped Cd3As2 | Bobrow, Eric; Vanderbilt, David; Li, Yi | We explore the monopole superconductivity arising from the proximity induced Cooper pairing in magnetically doped Dirac semimetal Cd 3As 2. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2066 | Topological superconductivity in an interacting type-II Weyl model | Rosenberg, Peter; Manousakis, Efstratios | Our model describes a type-II Weyl system, inspired by the electronic structure of MoTe 2, and we observe that the presence of extended interactions can give rise to topological superconducting states. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2067 | Fermi arc Criterion for Surface Majorana Modes in Superconducting Time-Reversal Symmetric Weyl-semimetals | GIWA, RAUF; Hosur, Pavan | We analytically calculate ν within a perturbative scheme and provide numerical support with an orthorhombic lattice model. | Session 151: Topological Superconductivity: Topological Insulators and Semimetals |
| 2068 | Anomalous Nernst and Seebeck coefficients in epitaxial thin film Co2MnAlxSi1-x | Yu, Han; Breidenbach, Aaron; Peria, William; Peterson, Timothy; McFadden, Anthony; Palmstrom, Chris; Crowell, Paul | As a result of the high sensitivity to the Weyl points near the Fermi level, we propose α xyA as a helpful tool to capture Weyl points that are too far from the Fermi level to produce significant effect in the anomalous Hall conductivity. | Session 152: Magnetic Materials and Properties |
| 2069 | Epitaxial Cr: An Electrically Conductive Transverse-Spin-Current Reflector | Lim, Youngmin; Srivastava, Abhishek; Nepal, Bhuwan; Wu, Shuang; Smith, David; Jiang, Zijian; Klewe, Christoph; Shafer, Padraic; Li, Jie-Fang; Viehland, Dwight; Mewes, Claudia; Heremans, Jean; Mewes, Tim; Emori, Satoru | We report evidence of conductive epitaxial (epi-) Cr (resistivity ~ 30 µΩ*cm) acting as a reflector of transverse spin current. | Session 152: Magnetic Materials and Properties |
| 2070 | Chemical substitution induced half-metallicity in CrMnSb(1-x)Px | O’Leary, Evan; Ramker, Adam; VanBrogen, Devon; Dahal, Bishnu; Montgomery, Eric; Poddar, Shashi; Kharel, Parashu; Stollenwerk, Andrew; Lukashev, Pavel | We report results of a computational work on the half-Heusler compound CrMnSb (1-x)P x. | Session 152: Magnetic Materials and Properties |
| 2071 | Magnetic and Transport Properties of Mn1+xZn1-xSb (0 < x < 1) Md Rafique Un Nabi, Aaron Wegner, Rabindra Basnet, Krishna Pandey, Gokul Acharya, Jin Hu | Nabi, Md Rafique Un | Magnetic and Transport Properties of Mn1+xZn1-xSb (0 < x < 1) Md Rafique Un Nabi, Aaron Wegner, Rabindra Basnet, Krishna Pandey, Gokul Acharya, Jin Hu | Session 152: Magnetic Materials and Properties |
| 2072 | Lattice Softening in Metastable bcc CoxMn100-x(001) Ferromagnetic Layers for a Strain-Free Magnetic Tunnel Junction | Elphick, Kelvin; Yoshida, Kenta; Roy, Tufan; Ichinose, Tomohiro; Kunimatsu, Kazuma; Tsuchiya, Tomoki; Tsujikawa, Masahito; Nagai, Yasuyoshi; Mizukami, Shigemi; Shirai, Masafumi; Hirohata, Atsufumi | We have developed an almost strain-free magnetic tunnel junction (MTJ) using metastable bcc Co xMn 100-x (CoMn) ferromagnetic films to reveal the reason. | Session 152: Magnetic Materials and Properties |
| 2073 | Electronic structure and magnetic properties of Mn1+xPt1-xSb (0 ≤ x ≤ 0.5) | Maruf, Abdullah Al; Valloppilly, Shah; Shand, Paul; Lukashev, Pavel; Kharel, Parashu | In this presentation, we will discuss the results from our theoretical and experimental investigations including electronic band structure, structural and magnetic properties of Mn 1+xPt 1-xSb compounds. | Session 152: Magnetic Materials and Properties |
| 2074 | Anisotropic change in the crystal structure across the valence state transition in EuPd2Si2 | Mardani, Masoud; Sharma, Shivani; Nelson, William; Baumbach, Ryan; Siegrist, Theo | Anisotropic change in the crystal structure across the valence state transition in EuPd2Si2 | Session 152: Magnetic Materials and Properties |
| 2075 | Voltage-induced ferromagnetism in diamagnetic FeS2 | Walter, Jeff; Voigt, Bryan; Day-Roberts, Ezra; Heltemes, Kei; Fernandes, Rafael; Birol, Turan; Leighton, Chris | Here, we provide proof-of-principle that ferromagnetism can be voltage-induced even from a diamagnetic, i.e., zero-spin state, suggesting that useful magnetic phases could be electrically-induced in “non-magnetic” materials [1]. | Session 152: Magnetic Materials and Properties |
| 2076 | Evidence of multiple magnetic phases in the Van der Walls ferromagnet CrI3 | Meseguer-Sánchez, Jaume; Guguchia, Zurab; Navarro-Moratalla, Efren; Santos, Elton | Combining muon spin rotation (μSR) and superconducting quantum interference device (SQUID) measurements, we reveal the presence of multiple magnetic phase transitions of different nature, suggesting that the ferromagnetic transition transcends the classical concept of long-range order. | Session 152: Magnetic Materials and Properties |
| 2077 | Voltage Gated Toggling of Exchange Bias in GdCo/NiO Thin Film Heterostructures | Hasan, Muhammad Usama; Zehner, Jonas; Huang, Mantao; Leistner, Karin; Beach, Geoffrey | Here we show that, when a GdCo/NiO bilayer with out of plane magnetization is loaded/unloaded with hydrogen, the expected switching of the dominant sublattice in GdCo is accompanied by a flipping of the effective EB direction as well. | Session 152: Magnetic Materials and Properties |
| 2078 | Dynamic Phase Transitions in Ferromagnetic Thin Films with Different Curie Temperatures | Marin Ramirez, Juan; Campillo, Gloria; Osorio, Jaime; Arnache, Oscar; Berger, Andreas | Therefore, here we study experimentally the dynamic magnetic behavior for a suitable series of samples that have different T/T c ratios, to explore their role in the vicinity of the DPT by means of a magneto-optical Kerr effect based detection scheme. | Session 152: Magnetic Materials and Properties |
| 2079 | Novel Mn-based Magnetic Material with Strong Spin-Orbit Coupling | Dissanayaka Mudiyanselage, Ranuri; Gui, Xin; Kong, Tai; Xie, Weiwei | Novel Mn-based Magnetic Material with Strong Spin-Orbit Coupling | Session 152: Magnetic Materials and Properties |
| 2080 | Room-Temperature Magnetic Bistability in Epitaxial Fe0.52Rh0.48/MgO(001) Film Grown by Molecular Beam Epitaxy and Its Application in Rewritable Magnetic Patterning | Tang, Yongjian; Mei, Antonio; Gray, Isaiah; Fuchs, Gregory; Schlom, Darrell; Ralph, Daniel | By utilizing molecular beam epitaxy as a tool to controllably tune the chemical composition of Fe 1-xRh x thin films, we have systematically investigated the magnetic transition as a function of x. Rhodium deficient films have a lower transition temperature T c compared to stoichiometric film. | Session 152: Magnetic Materials and Properties |
| 2081 | Evidence of phase separation in a (La,Pr,Ca)MnO3 thin film by ferromagnetic resonance. | Carranza-Celis, Diego; Skoropata, Elizabeth; Biswas, Amlan; Fitzsimmons, Michael; Schuller, Ivan; Ramirez, Juan | Here we report ferromagnetic resonance (FMR) and transport measurements on a LPCMO thin film across the FPS to SPS transition. | Session 152: Magnetic Materials and Properties |
| 2082 | Non-collinear Effects and Substrate-mediated Magnetic Interactions in Mn trimers on the GaN (000-1) Surface | Hunt, Diego; Barral, Maria Andrea; Ferrari, Valeria; Smith, Arthur | We estimate the magnetic anisotropy energy (MAE), and we find that in the case of Mn dimers, the exchange magnetic coupling is the dominant interaction, and that the ground state has the Mn spins in-plane with the GaN(000-1) substrate. | Session 152: Magnetic Materials and Properties |
| 2083 | Cij: A Python code for thermoelasticity | Luo, Chenxing; Deng, Xin; Wang, Wenzhong; Wu, Zhongqing; Wentzcovitch, Renata | Here, we introduce the Cij package, a Python implementation of the SAM-Cij method. | Session 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2084 | Liquid liquid transitions and liquid electrides in the alkali metals | Naden Robinson, Victor; Scandolo, Sandro; Hermann, Andreas; Ackland, Graeme; Zong, Hongxiang; Ayrinhac, Simon; Antonangeli, Daniele; decremps, frederic | We have used atomistic simulations with both density functional theory and machine-learned potentials, as well as picosecond acoustic measurements. | Session 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2085 | pgm: A Python package for free energy calculation | Zhuang, Jingyi; Wang, Hongjin; Zhang, Qi; Zhang, Zhen; Wentzcovitch, Renata | Here we present a Python package, pgm, for free energy and thermodynamic property calculations. | Session 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2086 | Impact-induced chemistry and physics through high-energy ball milling | Dera, Przemyslaw | This presentation will discuss results of ball milling experiments with simple oxides such as GeO 2 and TiO 2, aimed at inducing structural phase changes, as well as mechanochemical solid state reactions leading to formation of olivine-type compounds. | Session 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2087 | 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 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2088 | 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 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2089 | Direct Measurement of bulk temperature of Laser-compressed matter using Inelastic X-ray Scattering at X-ray Free Electron Lasers | McBride, Emma | Here, we present the development of a platform using inelastic X-ray scattering in a Johann geometry to measure temperature by the use of the principle of detailed balance. | Session 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2090 | Thermal gradient effect on the helium and intrinsic defects transport properties in Tungsten | Martinez Saez, Enrique; Mathew, Nithin; Perez, Danny; Wirth, Brian; Maroudas, Dimitrios | In this work, we use nonequilibrium molecular dynamics simulations to study the transport properties of He, and self-interstitial atoms in the presence of thermal gradients in tungsten. | Session 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2091 | Express: nonstop calculations with Quantum ESPRESSO | Zhang, Qi; Wang, Hongjin; Zhuang, Jingyi; da Silveira, Pedro; Wentzcovitch, Renata | Here we introduce Express, a new generation of workflows designed to facilitate calculations of the thermodynamic properties of materials. | Session 153: Matter in Extreme Environments: Theoretical and Experimental Advances |
| 2092 | Recent Progress on 3D Chiral Mechanical Metamaterials | Wegener, Martin | Concerning the static regime, we will present novel architectures that allow for bringing the push-to-twist conversion effects previously reported by us to much larger absolute values at larger numbers of unit cells. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2093 | Chirality-induced Normal-Shear Coupling Effects of Auxetic Chiral Mechanical Metamaterial | Liu, Siyao; Li, Yaning | Chirality-induced Normal-Shear Coupling Effects of Auxetic Chiral Mechanical Metamaterial | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2094 | Reconfigurable Kirigami | Choi, Gary; Dudte, Levi; Mahadevan, L. | We depart from this simple paradigm by proposing a framework for the design of compact reconfigurable kirigami patterns, which can morph from a closed and compact configuration into a deployed state conforming to any prescribed target shape, and subsequently be contracted into a different closed and compact configuration. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2095 | Topology Restricts Quasidegeneracy in Sheared Square Colloidal Ice | Oguz, Erdal; Ortiz ambriz, Antonio; Shem-Tov, Hadas; Babia-Soler, Eric; Tierno, Pietro; Shokef, Yair | We combine experiments, theory, and numerical simulations to demonstrate that sheared square colloidal ice partially recovers the ground-state degeneracy for a wide range of field strengths and lattice shear angles. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2096 | Liquid-induced topological transformations of cellular microstructures | Deng, Bolei; Li, Shucong; Bertoldi, Katia; Aizenberg, Joanna | Here we introduce a two-tiered dynamic strategy to achieve systematic reversible transformations of the fundamental topology of cellular microstructures that can be applied to a wide range of material compositions and geometries. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2097 | Screening of topological defects in elastic metamaterials | Sokolov, Tal; Shapira, Bar; Bar-Sinai, Yohai; Moshe, Michael; Lahini, Yoav | Here we demonstrate experimentally, and describe analytically, an exotic mechanical response of two dimensional elastic metamaterials – screening of the long-range elastic fields induced by topological defects (disclinations). | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2098 | Systematic Exploration on the Effective Mechanical Properties of Three-Dimensional Chiral Auxetic Mechanical Metamaterials | Li, Tiantian; Li, Yaning | Based on a monoclinic anisotropic model, an integrated numerical-analytical method is developed to model the constitutive behavior of chiral mechanical metamaterials. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2099 | Oligomodal Mechanical Metamaterials | Dykstra, David; Bossart, Aleksi; van der Laan, Jop; Coulais, Corentin | Here, we introduce a novel class of oligomodal metamaterials that encode a few but fixed number of distinct properties that can be selectively controlled under uniaxial compression. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2100 | Totimorphs | Chaudhary, Gaurav; Prasath, S Ganga; Soucy, Edward; Mahadevan, L. | We describe a mechanism by which a unit of zero stiffness structure can be assembled to create objects that can morph into multiple arbitrarily complex target shapes. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2101 | Topological, reconfigurable load-bearing cellular origami | Pasini, Damiano; Jamalimehr, Amin; Mirzajanzadeh, Morad | Inspired by notions of origami and kirigami, we introduce here a class of reconfigurable load-bearing cellular materials that can be easily realized to reversibly fold into multiple states, lock sturdily to bear the applied loads, as well as display omnidirectional compressive stiffness. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2102 | A reprogrammable mechanical metamaterial with stable memory | Chen, Tian; Pauly, Mark; Reis, Pedro | Here, to overcome this challenge, we demonstrate a design framework for a tileable mechanical metamaterial with stable memory at the unit cell level. | Session 154: Mechanical Metamaterials I – Novel Mechanics and Shape Morphing |
| 2103 | Local structure changes in 1T-TaS2-2xSe2x systems | Philip, Sharon; Schneeloch, John; Louca, Despina | In this project, we investigate the CDW phases in 1T-TaX 2 (X=S, Se) class of TMDs. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2104 | Direct, in-situ spatial imaging of van der Waals heterostructures | Sushko, Andrey; De Greve, Kristiaan; Andersen, Trond; Scuri, Giovanni; Zhou, You; Watanabe, Kenji; Taniguchi, Takashi; Kim, Philip; Park, Hongkun; Lukin, Mikhail | We present a method to directly image the local stacking order in complete vdW devices, including hBN-encapsulation, top- and bottom- graphite gates, and standard Si-substrates. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2105 | In-situ TEM study of graphene-encapsulated thin CrCl3 | Tanaka, Koichi; Zhen, Belinda; Ophus, Colin; Ciston, Jim; Gonzalez, Carlos; Ge, Zhehao; Ramirez, Arthur; Lashley, Jason; Zettl, Alex; Velasco Jr., Jairo; Yan, Aiming | 1 ,2 In this study, we investigate the crystal structure evolution of thin CrCl 3 at different temperatures using in-situ transmission electron microscopy (TEM). | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2106 | Varying Anisotropy in Oxidation of Two-Dimensional Transition Metal Dichalcogenides | Song, Myeong In; Ryu, Sunmin | In this work, we studied how the structural anisotropy influences the thermal oxidation of single and few-layer transition metal dichalcogenides (TMDs) in the form of MX 2, where M = Mo and W; X = S and Se. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2107 | 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 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2108 | Nanoimaging of surface waves in 2D materials | Voronine, Dmitri | In this work, new nanoimaging schemes based on tip-enhanced photoluminescence (TEPL) and Kelvin-probe force microscopy (KPFM) are presented, revealing the optical and electric components of surface waves in 2D TMD heterostructures, respectively. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2109 | Preferential hole defect formation in monolayer WSe2 by electron-beam irradiation | Shin, Donghan; Wang, Gang; O’Hara, Andrew; Han, Mengjiao; Lin, Junhao; Pantelides, Sokrates | Here we demonstrate that, in WSe 2, an initial formation of particular multivacancy structures gradually leads to a high density of 10-, 12-, 14-, and 16-member-ring round holes. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2110 | Large-area single-crystal sheets of borophene on various metal surfaces | Wu, Rongting; Eltinge, Stephen; Drozdov, Ilya; Gozar, Adrian; Zahl, Percy; Sadowski, Jerzy; Ismail-Beigi, Sohrab; Bozovic, Ivan | We report the synthesis of borophene on various metal surfaces with micrometer-scale single-crystal domains. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2111 | Facile and Non-Destructive Probe of Hydrogen Content in Hydrogenated Graphene: A Neutron Scattering Study | Daykin, Alexander; Ravula, Sudhir; Kaiser, Helmut; Heitmann, Thomas; Mazza, Alessandro; Baker, Gary; Miceli, Paul | Our study demonstrates a simple, effective, and nondestructive method of characterizing H content in bulk graphene materials. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2112 | Moire engineering for grain boundary design in graphene | Annevelink, Emil; Wang, Zhu-Jun; Dong, Guocai; Johnson, Harley; Pochet, Pascal | We present an application of this technique to tailoring graphene grain boundaries during synthesis. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2113 | Probing Excitonic Resonances of Metal Films on Suspended 2D Membranes Using Electron Energy Loss Spectroscopy | Brintlinger, Todd; Vega, Jose; Culbertson, James; Zalalutdinov, Maxim; Stroud, Rhonda; Robinson, Jeremy | We characterize Oriented Porous mEtallic Networks (OPEN) using aberration-corrected scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS). | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2114 | Scanning Tunneling Microscopy Study of S Vacancy Defect-Defect Interactions in Monolayer WS2 | Holbrook, Madisen; Lei, Chao; Hsu, Wei-Ting; Lu, Li-Syuan; Chang, Wen-Hao; MacDonald, Allan; Giustino, Feliciano; Ebert, Philipp; Shih, Chih-Kang | Here we report the creation of a high concentration of S vacancy defects in WS 2 monolayers by vacuum annealing, and characterization of their electronic properties and structure using scanning tunneling microscopy and spectroscopy. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2115 | Revealing the nature of size and odd/even effect observed by NanoDSC in 2D organic metal chalcogenides: atomic resolution crystallography via diffraction and ab initio calculations | Zhao, Jie; Ye, Zichao; Kang, Kisung; Shao, Yu-Tsun; McCormack, Scott; Efremov, Mikhail; Schleife, Andre; Zuo, Jian-Min; Kriven, Waltraud; Allen, Leslie | In this work, we innovatively overcome this obstacle by combining synchrotron powder X-ray diffraction, nanobeam electron diffraction, and ab initio calculations. | Session 155: Measuring Structure of 2D Materials in Real and Reciprocal Space |
| 2116 | Defect-assisted nonradiative recombination in halide perovskites | Van de Walle, Chris | We have performed comprehensive studies for the prototypical hybrid perovskite MAPbI 3 [MA=(CH 3NH 3)], as well as for other halide perovskites. | Session 156: Perovskites and Oxide Semiconductors |
| 2117 | Deep levels in cesium lead bromide from native defects and hydrogen | Swift, Michael; Lyons, John | In this work, we reject the SDH for CsPbBr 3. | Session 156: Perovskites and Oxide Semiconductors |
| 2118 | The Defect Tolerance of Chalcogenide Perovskites BaZrS3 and Ba3Zr2S7 | Luo, Jiang; Zhao, Boyang; ZHANG, ZHAOHAN; Chen, Huandong; Thind, Arashdeep; Hartman, Steven; Sadtler, Bryce; Ravichandran, Jayakanth; Mishra, Rohan | We have used BaZrS 3 and Ba 3Zr 2S 7 as prototypical CPs and investigated their defect tolerance to intrinsic point defects using a combination of density-functional-theory calculations, spectroscopic and transport measurements. | Session 156: Perovskites and Oxide Semiconductors |
| 2119 | Persistent photoconductivity in barium titanate | Pansegrau, Christopher; McCluskey, Matthew | Persistent photoconductivity in barium titanate | Session 156: Perovskites and Oxide Semiconductors |
| 2120 | Role of defects in photocatalytic water splitting: Monodoped vs Codoped SrTiO3 | Kumar, Manish; Bhattacharya, Saswata | Here we have investigated the role of monodopants (nonmetals (N, S) and metals (Mn, Rh)) and codopants in SrTiO 3 to ameliorate the photocatalytic efficiency for water splitting by reducing its bandgap using hybrid density functional theory (HSE06), many-body perturbation theory approach (viz. | Session 156: Perovskites and Oxide Semiconductors |
| 2121 | Localized Phase Transition of TiO2 Thin Films Induced by Sub-bandgap Laser Irradiation | Ahmed, Syeed; Poole, Violet; Igo, John; Gu, Yi; McCluskey, Matthew | Laser-induced localized phase transitions of sputtered titanium dioxide (TiO 2) thin films are reported in this study. | Session 156: Perovskites and Oxide Semiconductors |
| 2122 | Epitaxial stabilization of rutile germanium oxide thin film by molecular beam epitaxy | Chae, Sieun; Paik, Hanjong; Vu, Nguyen; Kioupakis, Emmanouil; Heron, John | Here, we report the growth of single-crystalline r-GeO 2 thin films on R-plane sapphire substrates using molecular beam epitaxy. | Session 156: Perovskites and Oxide Semiconductors |
| 2123 | Thermal Annealing ZnO and ZnS Powders as an Alternative to Type II Heterostructure Synthesis | Kuhs, Christopher; Jacobson, Christian; Reish, Matthew; Simmons, Jay; Halas, N; Everitt, Henry | Here we explore a simple thermal annealing approach and examine the effect annealing has on the defect and band edge emissions of four samples: vacuum-annealed ZnO with and without sulfur, and ZnS annealed in vacuum and with oxygen. | Session 156: Perovskites and Oxide Semiconductors |
| 2124 | Multipole Clustering is Responsible for the Doping Bottleneck in Hematite | Urena Baltazar, Valentin; Smart, Tyler; Ping, Yuan | In this work, we investigated the underlying mechanism of low optimal doping concentration from first-principles calculations with group IV (Ti, Zr, Hf) and XIV (Si, Ge, Sn, Pb) doping. | Session 156: Perovskites and Oxide Semiconductors |
| 2125 | Finite-size corrections of defect energy levels involving ionic polarization | Falletta, Stefano; Wiktor, Julia; Pasquarello, Alfredo | We develop a scheme for finite-size corrections of vertical transition energies and single-particle energy levels involving defect states with built-in ionic polarization in supercell calculations. | Session 156: Perovskites and Oxide Semiconductors |
| 2126 | Donor doping of CsPbBr3 | Lyons, John | Here I examine how bismuth incorporates into CsPbBr 3 using first-principles hybrid density functional theory. | Session 156: Perovskites and Oxide Semiconductors |
| 2127 | First-principles calculations of native defects in beryllium oxide | CHEN, YUBI; Turiansky, Mark; Van de Walle, Chris | We examine the energetics and electronic structure, as well as the atomic geometries and spin properties of the native defects of BeO. | Session 156: Perovskites and Oxide Semiconductors |
| 2128 | Resolving the puzzle of solvated electrons’ location in alkali metal doped zeolites | Sarker, Debalaya; Troppenz, Maria; Rigamonti, Santiago; Draxl, Claudia; Levchenko, Sergey; Scheffler, Matthias | Combining a cluster-expansion model, parameterized with density-functional theory calculations, with ab initio atomistic thermodynamics, we address this issue. | Session 156: Perovskites and Oxide Semiconductors |
| 2129 | From magnetoelectric response to optical activity | Mahon, Perry; Sipe, John | We apply a microscopic theory of polarization and magnetization to crystalline insulators at zero temperature, and consider the orbital electronic contribution of the linear response to non-uniform and non-static electromagnetic fields. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2130 | Tunable, ferroelectricity-inducing, spin-spiral magnetic ordering in monolayer FeOCl | Bao, Deliang; O’Hara, Andrew; Pantelides, Sokrates | Using density functional theory, we demonstrate that SS ordering, found in bulk FeOCl, also exists in ML FeOCl whose synthesis was recently reported. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2131 | First experimental tests towards cavity-enhanced ferroelectricity | Korosec, Lukas; Fowlie, Jennifer; Mazza, Giacomo; Triscone, Jean-Marc | Our project aims to modify physical properties of functional materials using this phenomenon. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2132 | Band gap narrowing in ferroelastic twin walls at CaTiO3(001) surface | Barrett, Nicholas; Wu, Qiang; Martinotti, Dominique; Salje, Ekhard; Lubin, Christophe; Geneste, Gregory | Band gap narrowing in ferroelastic twin walls at CaTiO3(001) surface | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2133 | Photoinduced strain in ferroelectric-based cantilevers | Gable, Stéphane | In this work, the interplay between the electric polarization and the photoinduced strain is investigated in PZT epitaxial-based cantilevers. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2134 | Creation of a Monolayer Ferroelectric using Substitutional Impurities | Richardson, Nicholas; O’Hara, Andrew; Pantelides, Sokrates | We performed density-functional-theory calculations to explore inducing ferroelectricity through incorporation of isovalent substitutional impurities that are larger than the host atoms. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2135 | Low-Dimensional Noncollinear Ferroelectricity in Group-VI Oxyhalides | Lin, Ling-Fang; ZHANG, YANG; Moreo, Adriana; Dagotto, Elbio; Dong, Shuai | Low-Dimensional Noncollinear Ferroelectricity in Group-VI Oxyhalides | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2136 | Effects of ferroelectric displacement and octahedral rotations on the electronic structure of BiFeO3 | Laraib, Iflah; Carniero, Marciano; Janotti, Anderson | We find the band gap decreases from 3.4 eV for the R3c, to 2.9 eV for the R-3c, and to 1.6 eV for the cubic BiFeO 3, by significant lowering of the conduction band and slight raising of the valence band. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2137 | Circular photogalvanic effect in inversion symmetric crystal: the case of ferro-rotational order in Ta2NiSe5 | Jog, Harshvardhan; Harnagea, Luminita; Mele, Eugene; Agarwal, Ritesh | We use circular photogalvanic effect (CPGE), and by eliminating any lower-order contributions using symmetries of the system, show that ferro-rotational order can be directly probed. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2138 | Anisotropic and electric-field dependent heat conduction in CuO | Akopyan, Artem; Prasai, Narayan; Rebello, A.; Neumeier, John; Cohn, Joshua | b We will discuss the temperature and electric field dependent thermal conductivity (κ) measured on high-quality single crystals c along the principal crystallographic axes. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2139 | Phono-magnetic analogs to opto-magnetic effects | Juraschek, Dominik; Narang, Prineha; Spaldin, Nicola | Here, we theoretically describe phonon analogs of these effects, in which coherently excited infrared-active phonons replace photons in the scattering process, which is mediated through spin-phonon coupling. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2140 | A room-temperature ferroelectric semimetal | Sharma, Pankaj | Here, we provide evidence that native metallicity and ferroelectricity coexist in bulk crystalline van der Waals WTe2. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2141 | An investigation into the multiferroic properties of LuFe2O4 based systems under the influence of electron-hole doping | Das, Hena | We, therefore, have studied the bulk LuFe 2O 4 under the influence of electron-hole doping to gain further insight into the interesting quantum phenomena in these systems. | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2142 | Orbital Moment enhanced novel giant magnetoelectric of Fe2Mo3O8 | Zhang, Lunyong; Pascut, Gheorghe; Gao, Bin; Agrestini, Stefano; Valvidares, Manuel; hu, zhiwei; Cheong, Sang-Wook | To shed new light in this direction, we have investigated the electronic and magnetic properties of Fe 2Mo 3O 8 by element-selective X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism spectroscopy (XMCD). | Session 157: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -5 |
| 2143 | Deterministic Positioning of Defect Based Qubits using Ion Beam Implantation for Nanofabrication and Modification | Bielejec, Edward | We will present our results on ion beam implantation for nanofabricate and modifications down to single atom devices via direct write nanofabrication at Sandia National Laboratories’ Ion Beam Laboratory. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2144 | Defect Engineering Enables Site-Controlled Single-Photon Generation in Monolayer WSe2 up to 150 K | Parto, Kamyar; Banerjee, Kaustav; Moody, Galan | This work demonstrates a novel method of designing site-specific single-photon emitters in atomically thin WSe 2 with near-unity yield utilizing independent and simultaneous strain engineering via nanoscale stressors and defect engineering via electron-beam irradiation. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2145 | Laser writing with a solid immersion lens: towards optically coherent nitrogen-vacancy centers in microstructured diamond | Yurgens, Viktoria; Zuber, Josh; Flågan, Sigurd; De Luca, Marta; Shields, Brendan; Jakubczyk, Tomasz; Zardo, Ilaria; Maletinsky, Patrick; Warburton, Richard | We present NV arrays that have been created between 1 and 40 µm from a diamond surface, presenting optical linewidth distributions with means as low as 61.0 MHz, including spectral diffusion induced by off-resonant repump. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2146 | Optical properties of plasmonic metasurface with sub-nm gaps – Extremely large third-order nonlinear optical effects caused by electron transports – | Takeuchi, Takashi; Yabana, Kazuhiro | To take into account quantum mechanical effects, we employ time-dependent density functional theory(TDDFT) treating the constituent nano-particles by a jellium model. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2147 | Simulating STM Images for Atomic Precision Dopant Placement in Si | Wyrick, Jonathan; Wang, Xiqiao; Kashid, Ranjit; Namboodiri, Pradeep; Fei, Fan; Silver, Richard | We detail density functional theory calculations which simulate scanning tunneling microscopy (STM) images and enable in situ determination of species adsorbed at planned P adsites. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2148 | Electric-Field Control of Strain-Driven Tuning of FMR in the Low-Loss Ferrimagnetic Coordination Compound V[TCNE]x | Kurfman, Seth; Franson, Andrew; Shah, Piyush; Shi, Yueguang; Flatté, Michael; Srinivasan, Gopalan; Page, Michael; Johnston-Halperin, Ezekiel | To date, this work has exploited low-loss ferrite materials mechanically coupled to piezoelectric substrates. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2149 | Probing the Structure of V[TCNE]x via Electron Energy Loss Spectroscopy | Trout, Amanda; Kurfman, Seth; Chilcote, Michael; Johnston-Halperin, Ezekiel; McComb, David | We present scanning transmission electron microscopy (STEM) electron energy loss spectroscopy (EELS) of V[TCNE] x films using a vacuum transfer holder. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2150 | An in-situ single photon source detection platform for deterministic nanometer resolution ion implantation | Titze, Michael; Chandrasekaran, Vigneshwaran; Htoon, Han; Bielejec, Edward | We developed a platform for focused ion beam (FIB) implantation that allows control of positioning to <50 nm and implantation down to single impurity atoms using counted ion implantation. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2151 | Single crystal diamond membranes for quantum networking and sensing | Guo, Xinghan; Delegan, Nazar; Li, Zixi; Liu, Tianle; Butcher, Amy; Awschalom, David; Joseph, F.; High, Alexander | Herein we will present the fabrication steps in detail, including He + implantation, CVD overgrowth, membrane undercut and transfer, backside etching, and additional patterning. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2152 | High-Q Nanophotonic Resonators on Diamond Membranes using Atomic Layer Deposition TiO2 | Butcher, Amy; Guo, Xinghan; Shreiner, Robert; Delegan, Nazar; Hao, Kai; Duda, III, Peter; Awschalom, David; Joseph, F.; High, Alexander | In this work, we fabricated ring resonators and 1D photonic crystal cavities (PhCCs) with quality factors exceeding 10^4 and integrated high-Q PhCCs with diamond membranes. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2153 | First-principles study of negatively charged nitrogen vacancy and silicon vacancy in diamond in strained environments | Huang, Benchen; Ma, He; Jin, Yu; Hsieh, Satcher; Bhattacharyya, Prabudhya; Zu, Chong; Kobrin, Bryce; Yao, Norman; Galli, Giulia | First-principles study of negatively charged nitrogen vacancy and silicon vacancy in diamond in strained environments | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2154 | Molecular pathways and thermal stabilities of vacancy-complex formation in silicon carbide | Lee, Elizabeth; Yu, Alvin; De Pablo, Juan; Galli, Giulia | Here we investigate the dynamics of several vacancy defects in SiC using molecular dynamics simulations. | Session 158: Materials for Quantum Information Science-1 (Materials Engineering) |
| 2155 | Perturbative approach to electrocaloric effects | Graf, Monica; Iniguez, Jorge | In this work we show that, by expressing EC temperature and entropy changes as Taylor series of the applied electric field, one can qualitatively predict and explain all EC effects observed in ferroelectric and antiferroelectric materials. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2156 | Deep Learning of Accurate Force Field of Ferroelectric HfO2 | Wu, Jing; Zhang, Yuzhi; Zhang, Linfeng; Liu, Shi | We developed a deep neural network-based interatomic force field of HfO2, enabling molecular dynamics simulations of this silicon-compitable ferroelectrics at large time and length scales. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2157 | Electron-electron correlations and Higher Harmonic generation in perovskite BaTiO3 | Alam, Didarul; Ud, Naseem; Gholam Mirzaeimoghadar, Shima; Chini, Michael; Turkowski, Volodymyr | We apply the Dynamical Mean-Field Theory+Time-Dependent Density-Functional Theory (DMFT+TDDFT) approach to study the role of strong electron-electron correlations in the high-order harmonic (HH) spectra in perovskite BaTiO 3. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2158 | Methods of Manipulating and Dynamics of Ferroic Order in BiFeO3 | Parsonnet, Eric; Caretta, Lucas; Qualls, Alexander; Gosavi, Tanay; Nikonov, Dmitri; Lin, Chia-Ching; Young, Ian; Bokor, Jeffrey; Martin, Lane; Ramesh, Ramamoorthy | Here we explore the switching dynamics of various ferroic orders in BiFeO3 and coupled BiFeO3/Ferromagnetic heterostructures as well as investigate ways to excite and manipulate low-energy excitations of ferroic order. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2159 | Reversible Redox Properties of Multiferroic Sr1-xBaxMn1-yTiyO2+d | Krivyakina, Elena; Kolesnik, Stanislaw; Li, Cheng; Dabrowski, Bogdan; Rosenkranz, Stephan; Chmaissem, Omar | We report the phase transformations under various conditions of manganese-based multiferroic perovskite materials with 6% titanium-doping at the magnetic B site in Sr 1-xBa xMn 1-yTi yO 2+ d (with d ~ 0.4 – 1). | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2160 | Switchable photovoltaic properties in PZT epitaxial thin films | Rani, Komalika | In this work, a careful study of the switchability of the PV properties of epitaxial lead zirconate titanate thin films has been conducted in order to investigate the role played by the ferroelectric polarization. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2161 | Enhanced Tunneling Electroresistance in MoS2-Hf0.5Zr0.5O2-W Heterojunctions | Chaudhary, Pradeep; Buragohain, Pratyush; Chouprik, Anastasia; Lipatov, Alexey; Sinitskii, Alexander; Zekenvich, Andrei; Gruverman, Alexei | Here, we report the polarization-controlled TER of up to 10 5 % in Hf 0. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2162 | Multiscale Electric Field Imaging in Ferroelectric Vortices | Addiego, Christopher; Gao, Wenpei; Pan, Xiaoqing | Using a highly convergent electron probe in a scanning transmission electron microscope with sub-Å resolution, we have studied the electric field at the scale of individual atoms and unit cells, revealing a different pattern in the local electric field than what is observed when using a nanometer scale probe. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2163 | Band-Mott mixing hybridizes the gap in Fe2Mo3O8 | Park, Kiman; Pascut, Gheorghe; Khanal, Ghanashyam; Yokosuk, Michael; Xu, Xianghan; Gao, Bin; Gutmann, Matthias; Litvinchuk, Alexander; Kiryukhin, Valery; Cheong, Sang-Wook; Vanderbilt, David; Haule, Kristjan; Musfeldt, Janice | We combine optical spectroscopy and first-principles electronic structure calculations to reveal the microscopic character of the charge gap in polar magnet Fe 2Mo 3O 8. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2164 | Theoretical investigation of ferroelectric switching in La-doped BiFeO3 | Fedorova, Natalya; Nikonov, Dmitri; Young, Ian; Iniguez, Jorge | We combine phenomenological Landau-Devonshire (LD) theory and density functional theory (DFT) to investigate the effect of La doping on the structural and dynamic properties of La xBi 1-xFeO 3 (LBFO). | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2165 | Optimization of artificial antiferroelectrics from second-principles simulations | Aramberri, Hugo; Fedorova, Natalya; Iniguez, Jorge | In this talk I will summarize our most recent findings. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2166 | Atomistic calculations of elastocaloric effects in ferroelectric materials | Murillo Navarro, Diana Elisa; Graf, Mónica; Iniguez, Jorge | Here we introduce a theoretical approach to compute and analyze the elastocaloric response from atomistic simulations and present our results for PbTiO 3. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2167 | Polarized Raman spectroscopy on epitaxial barium titanate thin films on silicon | Schmitt, Sebastian; Olaniyan, Israel Ibukun; Magen, Cesar; Schamm-Chardon, Sylvie; Dubourdieu, Catherine | Here we show, how a proper alignment of sample axis, polarizers and analyzers permits to fully suppress Raman scattering from the Si substrate and enables the recording of polarized Raman spectra from thin BTO films on Si. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2168 | Atomic and Electronic Structure Changes Underlying Votex Polarization Domains in Hexagonal RMnO3 | Tyson, Trevor; Liu, Sizhan; Sadowski, Jerzy; Newville, Matthew; Lanzirotti, Antonio; Cheong, Sang-Wook | Atomic and Electronic Structure Changes Underlying Votex Polarization Domains in Hexagonal RMnO3 | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2169 | Angular Dependence of Surface Energy with Crystal Directions of LiNbO3 (110) for Nano-BondingTM to Si and α-quartz SiO2 | Elison, Abbie; Sahal, Mohammed; Prakash, Shefali; Swaminathan, Srivatsan; Rane, Riley; Baker, Brian; Narayan, Saaketh; Kintz, Jacob; Yano, Aliya; Brimhall, Alex; Puglisi, Lauren; Culbertson, Robert; Herbots, Nicole | Instead, this work uses Nano-Bonding TM, 1 (NB) and Surface Energy Engineering to modify surface energies into ‘far-from-equilibrium’ states so that when nano-contacted, a 2D-precursor phase forms to catalyze bonding. | Session 159: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -4 |
| 2170 | Spin State Relaxation in Spin Crossover Molecules | Park, Haechan; Chen, Jia; Cheng, Hai-Ping | In this study, we aim to build a model in a simple and straightforward manner and solve a master equation within the reduced density matrix (RDM) formalism and the golden rule expression. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2171 | Modeling Harmonic and Anharmonic Spin-Vibron Coupling in the Fe3+ Molecular Magnetic | Dema, Karma; Pederson, Mark | We have performed frozen phonon calculations on the chiral Fe 3O(NC 5H 5) 3(O 2CC 6H 5) 6 molecular cation and determined magnetic changes as a function of phonon displacement. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2172 | Spin-crossover in Molecules and Solids with a Low-cost, Well-behaved meta-GGA Density Functional | Trickey, Samuel; Mejia-Rodriguez, Daniel; Albavera Mata, Angel | Spin-crossover in Molecules and Solids with a Low-cost, Well-behaved meta-GGA Density Functional | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2173 | Electric field control of spins in piezoelectrics, ferroelectrics, molecules, and on surfaces | Ardavan, Arzhang | Electric field control of spins in piezoelectrics, ferroelectrics, molecules, and on surfaces | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2174 | Magnetic Properties of Frustrated Triangular Copper Based Qubits | Reyes, Ian; Hooshmand, Zahra; Pederson, Mark | Here we focus on the search for appropriate qubits, polymeric building blocks for quantum computers, that can effectively be implemented into such electronic systems. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2175 | Competing Exchange Interactions and Multiferroic Behavior of a Molecule-Based Magnet | Fishman, Randy; Bai, Xiaojian; Garlea, Vasile; Hong, Tao; Fernandez-Baca, Jaime; Cao, Huibo; Tian, Wei; Lee, Minseong; Zapf, Vivien; Lee, Junhee; Clune, Amanda; Hughey, Kendall; Musfeldt, Janice | We evaluate the magnetic interactions in the low-field multiferroic phase by comparing inelastic neutron scattering spectra of a single crystal with a simple Heisenberg model containing five exchange interactions mediated by intermolecular hydrogen and halogen bonds. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2176 | An umbrella for electron rain: Dependence of magnetization on the direction of alkane bridge | Hooshmand, Zahra; Johnson, Alexander; Dema, Karma; Pederson, Mark | Here, we present calculated results based on density functional theory for switching the magnetism of the Fe 3-graphene system by controlling the orientation of a mechanical charge-transfer bridge,CH 4 . | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2177 | Electric field control of single spins in oxide ferroelectric hosts | Leclerc, Nima; Inzani, Katherine; Das, Sujit; Laguta, Valentin; Ardavan, Arzhang; Pokhrel, Nabaraj; Nowadnick, Elizabeth; Ramesh, Ramamoorthy; Griffin, Sinead | Despite the successful scaling of CMOS transistor gate lengths below 10 nm, there has been a corresponding increase in losses as we approach the Boltzmann limit of current control. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2178 | Magnetoelectric effect arising from a field-induced pseudo Jahn-Teller distortion in a rare-earth magnet | Lee, Minseong; Chen, Qiang; Choi, Eun Sang; Huang, Qing; Wang, Zhe; Ling, Langsheng; Qu, Zhe; Wang, Guohua; Ma, Jie; Aczel, Adam; Zhou, Haidong | In sharp contrast, here we identify CsEr(MoO4)2 as a magnetoelectric material without magnetic transition metal ions, thus ensuring that the Er ions play a key role in achieving this interesting property. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2179 | Pressure-induced ferroelectric reentrance in a molecular magnet | Wu, Yan; Ding, Lei; Su, Na; Cheng, Yongqiang; Chakoumakos, Bryan; Tian, Wei; Sun, Young; Cheng, Jinguang; Cao, Huibo | The interplay of spin, charge and lattice under pressure in this molecular magnet system brings new insights into the study of multiferroics and new routes in designing multi-functional materials. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2180 | Methodological Choices for the Spin-Crossover Energy: Mn(taa) as an Example | Albavera Mata, Angel; Mejia-Rodriguez, Daniel; Fonseca, Eric; Cheng, Dianteng; Cheng, H-P.; Trickey, Samuel; Hennig, Richard | With Mn(taa) as the example, we discuss the effects of DFA choice, dispersion corrections, whether and how to use Hubbard U corrections, and technical and procedural sensitivities and subtleties. | Session 160: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics -3 |
| 2181 | Canted Spin Texture and Quantum Spin Hall Effect in WTe2 | Garcia Aguilar, José; Vila, Marc; Hsu, Chuang-Han; Waintal, Xavier; Pereira, Vitor; Roche, Stephan | We report an unconventional quantum spin Hall phase in the monolayer Td-WTe 2, which exhibits hitherto unknown features in other topological materials. | Session 161: Novel Topological and Magnetic Materials |
| 2182 | Phononic control of magnetism in a topological insulator | Padmanabhan, Hari; Koocher, Nathan; Kim, Peter; Poore, Maxwell; Stoica, Vladimir; Puggioni, Danilo; Wang, Huaiyu; Lee, Seng Huat; Wetherington, Maxwell; Schaller, Richard; Averitt, Richard; Rondinelli, James; Gopalan, Venkatraman | In this work, we demonstrate for the first time, the optical control of magnetism in a topological insulator. | Session 161: Novel Topological and Magnetic Materials |
| 2183 | Anomalous Hall effect in ferromagnetic semiconductors: the case of Ga1-xMnxAs1-yPy | Liu, Xinyu; Riney, Logan; Wang, Jiashu; Dong, Sining; Guo, Lei; Zheng, Ren-Kui; Li, Xiang; Bac, Seul-Ki; Kossut, Jacek; Dobrowolska, Malgorzata; Furdyna, J; Hsu, Yi-Ting; Assaf, Badih | By applying a modified Brillouin-Weiss model for the magnetization, we decompose the AHE into an “extrinsic” contribution (due to scattering) and a dominating “intrinsic” contribution (due to the Berry curvature). | Session 161: Novel Topological and Magnetic Materials |
| 2184 | Orbital hybridization in the spin-glass state of Mn-doped ZnTe | Alcantara, Alexandria; Barrett, Steven; Matev, Dina; Miotkowski, Ireneusz; Ramdas, Anant; Pekarek, Thomas; Haraldsen, Jason | From our analysis of the electronic structure evolution with doping and onsite potential, we confirm the semiconducting state of the material as well as show that Te-Mn pd-orbital hybridization is activated with the Mn doping above 25%, which is around the doping when the spin-glass transition begins to rise, which could be a precursor to the spin-glass state. | Session 161: Novel Topological and Magnetic Materials |
| 2185 | Phonon vibration modes of layered MnBi2nTe3n+1 (n=1,2,3,4) topological heterostructures | Cho, Yujin; Kang, Jin Ho; Liang, Liangbo; Puretzky, Alexander; Kong, Xiangru; Ghosh, Subhajit; Kargar, Fariborz; Hu, Chaowei; Ni, Ni; Balandin, Alexander; Geohegan, David; Wong, Chee Wei | In this talk, we present the phonon modes of bulk MnBi 2nTe 3n+1 (n=1,2,3,4) at various temperatures and polarization configurations, using optical Raman spectroscopy. | Session 161: Novel Topological and Magnetic Materials |
| 2186 | Prediction of momentum dependent spin splitting in low-Z collinear and noncollinear antiferromagnets even without spin-orbit coupling | Yuan, Linding; Wang, Zhi; Luo, Jun-Wei; Rashba, Emmanuel; zunger, alex | We identify the magnetic symmetry conditions that produce AFM prototypes having spin splitting even without external magnetic field and even when the SOC is set to zero. | Session 161: Novel Topological and Magnetic Materials |
| 2187 | Experimental Signatures of Ground State and Photoexcited Edge Magnetism in Phosphorene Nanoribbons | Ashoka, Arjun; Howard, Christopher; Rao, Akshay; Pandya, Raj | Using polarisation sensitive pump-probe spectroscopy with sub-1T magnetic fields we demonstrate signatures of room temperature ground state ferromagnetism in these materials via a magnetic field-induced anisotropy. | Session 161: Novel Topological and Magnetic Materials |
| 2188 | Spin Texture Probed with Magnetoresistance in Ferromagnetic EuO1-x Thin Films | Shrestha, Narendra; Tang, Jinke | At present significant research effort is being placed in the study of topological particle-like magnetic skyrmions for electronic and spintronic applications. | Session 161: Novel Topological and Magnetic Materials |
| 2189 | Dielectric and magnetic properties | USMAN, AYESHA; Kayani, Zohra | Dielectric and magnetic properties | Session 161: Novel Topological and Magnetic Materials |
| 2190 | Computational investigation of the spin-1 state of Ti-doped CdSe | Dimuna, John; Boyett, Tucker; Miotkowski, Ireneusz; Ramdas, Anant; Pekarek, Thomas; Haraldsen, Jason | Using computational and experimental techniques, we examine the 2+ oxidation state of Ti when doped into CdSe. | Session 161: Novel Topological and Magnetic Materials |
| 2191 | Resonant tunneling anisotropic magnetoresistance induced by magnetic proximity | Shen, Chenghao; Leeney, Timothy; Matos Abiague, Alex; Scharf, Benedikt; Han, Jong E; Zutic, Igor | We reveal that the interplay between Rashba spin-orbit coupling and proximity-induced magnetization in a two-dimensional electron gas leads to peculiar transport properties and large anisotropy of magnetoresistance. | Session 161: Novel Topological and Magnetic Materials |
| 2192 | Insights into the local atomic and magnetic structure of MnTe using Magnetic Pair Distribution Technique | Baral, Raju; Frandsen, Benjamin | We report comprehensive atomic and magnetic pair distribution function (PDF) analysis of neutron total scattering data collected from pure and Na-doped MnTe in the temperature range of 2 K – 500 K. | Session 161: Novel Topological and Magnetic Materials |
| 2193 | Topologically nontrivial magnetism in Cr2Te3 ultrathin films | Chi, Hang; Ou, Yunbo; Eldred, Tim; Gao, Wenpei; Lauter, Valeria; Dreyer, Michael; Butera, Robert; Coster, George; Rong, Charles; Heiman, Donald; Moodera, Jagadeesh | Topologically nontrivial magnetism in Cr2Te3 ultrathin films | Session 161: Novel Topological and Magnetic Materials |
| 2194 | Distinguishing dipolar and octupolar quantum spin ices | Patri, Adarsh; Hosoi, Masashi; Kim, Yong-Baek | In this talk, we theoretically propose that a magnetostriction measurement can be used as a powerful tool to access the novel properties of multipolar-based quantum spin liquids. | Session 162: Spin Ice II & Kitaev Systems |
| 2195 | Hidden phases born of a quantum spin liquid: Application to pyrochlore spin ice | Yang, Hyeok-Jun; Shannon, Nicholas; Lee, SungBin | Here, we formulate the effective parton interactions to explore the hidden phases beyond the perturbative approach. | Session 162: Spin Ice II & Kitaev Systems |
| 2196 | The Emergent Fine Structure Constant of Quantum Spin Ice Is Large | Pace, Salvatore; Morampudi, Siddhardh; Moessner, Roderich; Laumann, Christopher | Here, we show that the two greatly differ in their fine-structure constant α, which parametrizes how strongly matter couples to light: αQSI is more than an order of magnitude greater than αQED≈1/137. | Session 162: Spin Ice II & Kitaev Systems |
| 2197 | Persistent homology as an order parameter for classical spins | Olsthoorn, Bart; Hellsvik, Johan; Balatsky, Alexander | We show that persistent homology – a relatively new field in applied mathematics – can be used as a universal framework to construct a phase diagram [1]. | Session 162: Spin Ice II & Kitaev Systems |
| 2198 | U(1) and Z2 spin liquids on the pyrochlore lattice | Liu, Chunxiao; Halász, Gábor; Balents, Leon | In this work we explore the possibility of finding spin liquids whose low energy theories go beyond this standard one. | Session 162: Spin Ice II & Kitaev Systems |
| 2199 | Importance of dynamic lattice effects for crystal field excitations in quantum spin ice candidate Pr2Zr2O7 | Xu, Yuanyuan; Man, Huiyuan; Tang, Nan; Baidya, Santu; Nakatsuji, Satoru; Vanderbilt, David; Drichko, Natalia | We directly observed a splitting of the excited state doublet at around 55 meV which originates from vibronic coupling of the E g doublet with a phonon. | Session 162: Spin Ice II & Kitaev Systems |
| 2200 | Realization of the kagome spin ice state in frustrated intermetallic HoAgGe | Zhao, Kan | Using experimental and theoretical approaches including magnetometry, thermodynamic measurements, neutron scattering and Monte Carlo simulations, we establish HoAgGe as a crystalline (i.e. non-artificial) system that realizes the kagome spin ice state. | Session 162: Spin Ice II & Kitaev Systems |
| 2201 | Observation of magnetic ordering in Kitaev material Ag3LiIr2O6 in the absence of structural disorder | Bahrami, Faranak; Kenney, Eric; Wang, Chennan; Berlie, Adam; Lebedev, Oleg; Graf, Michael; Tafti, Fazel | In this talk, we present a comparative study between clean and disordered samples of Ag 3LiIr 2O 6 to highlight the effects of structural disorder on the magnetic behavior of the material. | Session 162: Spin Ice II & Kitaev Systems |
| 2202 | Symmetry Analysis of Tensors for the Honeycomb Lattice of Edge-Sharing Octahedra | Utermohlen, Franz; Trivedi, Nandini | We obtain the most general form of rank-2 and rank-3 tensors allowed by the symmetries of a honeycomb lattice of edge-sharing octahedra (such as alpha-RuCl3 and CrI3). | Session 162: Spin Ice II & Kitaev Systems |
| 2203 | Visualization of Isospin Momentum Texture of Dirac Magnons and Excitons in a Honeycomb Quantum Magnet | Elliot, Miska; McClarty, Paul; Prabhakaran, Dharmalingam; Johnson, Roger; Walker, Helen; Manuel, Pascal; Coldea, Radu | Insights from this field have reached into many areas of physics and in this talk we describe certain universal signatures of band topology in propagating bosonic quasi-particles. | Session 162: Spin Ice II & Kitaev Systems |
| 2204 | Understanding the magnetic interactions of the zig-zag honeycomb lattice: Application to RuCl3 | Wilson, Evan; Haraldsen, Jason | In this talk, we investigate the effects of variable exchange interactions on the spin dynamics of the zig-zag honeycomb lattice. | Session 162: Spin Ice II & Kitaev Systems |
| 2205 | Ground-state phase diagram of the S=1/2 Heisenberg-Γ model on a honeycomb lattice. | Suzuki, Takafumi; Yamada, Takuto; Suga, Sei-ichiro | In this study, we focus on the effect of the anisotropic interaction; we investigate the ground state from the isolated dimer limit to the spin-chain limit by changing the coupling constants. | Session 162: Spin Ice II & Kitaev Systems |
| 2206 | Ground-state phase diagram of the Kitaev-Γ model on a honeycomb lattice | Suga, Sei-ichiro; Suzuki, Takafumi; Yamada, Takuto | We investigate the ground-state phase diagram of the Kitaev-Γ model on a honeycomb lattice by utilizing series expansions and numerical exact diagonalizations [1]. | Session 162: Spin Ice II & Kitaev Systems |
| 2207 | 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 163: Molecular Glasses and Liquids |
| 2208 | Probing the Dynamics of Molecular Stable Glasses Using Solvent Vapor Annealing with In-situ Ellipsometry | Govind, Shivajee; Zhang, Aixi; Jin, Yi; Wolf, Sarah; Fakhraai, Zahra | We introduce a novel and indirect method of measuring the dynamics of SGs using solvent vapor annealing (SVA), combined with in-situ ellipsometry. | Session 163: Molecular Glasses and Liquids |
| 2209 | The role of the free surface state in the formation of simulated physically vapor deposited glasses | Moore, Alex; Jin, Yi; Zhang, Aixi; Govind, Shivajee; Wolf, Sarah; Zhao, Haoqiang; Walsh, Patrick; Fakhraai, Zahra; Riggleman, Robert | In this work, we use molecular dynamics simulations to study a coarse-grained model glass-former based on the molecule 9-(3,5-di(naphthalen-1-yl)phenyl)anthracene (α,α-A), within which we vary the strength of the dihedral potential on the respective side-groups to systematically study the effects of intramolecular degrees of freedom on molecular packing. | Session 163: Molecular Glasses and Liquids |
| 2210 | Simulating PVD Glass: Over What Length Scale Does an Inorganic Substrate Perturb the Structure of a Glassy Organic Semiconductor? | DENG, CHUTING; Bagchi, Kushal; Bishop, Camille; Jackson, Nicholas; Ediger, Mark; De Pablo, Juan | Here, we combine coarse-grained molecular dynamics (MD) simulation and experiments to study the molecular structures at the buried interfaces of PVD glass of an organic semiconductor, DSA-Ph (1,4-di-[4-(N,N-diphenyl)amino]styrylbenzene), on different substrates. | Session 163: Molecular Glasses and Liquids |
| 2211 | Aging dynamics in a model polymeric glass-former far from equilibrium | Jaeger, Tamara; Simmons, David | Below T A, the we find that the timescale for aging in overdense glasses can be predicted with zero parameters from equilibrium behavior via an Arrhenius interpolation between T A and the temperature of departure from equilibrium, again identifying T A as key to understanding the nature of glasses. | Session 163: Molecular Glasses and Liquids |
| 2212 | Structural signature of super-Arrhenian behavior | Caruthers, James; Yungbluth, Jack; Savoie, Brett; Medvedev, Grigori | In this communication we report on a promising candidate for a structural feature that correlates with the emergence of super-Arrhenian behavior in glass forming materials. | Session 163: Molecular Glasses and Liquids |
| 2213 | Microscopic origin of excess wings in the relaxation spectra of deeply supercooled liquids | Scalliet, Camille; Guiselin, Benjamin; Berthier, Ludovic | We devise a simple model based on these observations, and successfully reproduce the qualitative shape of dielectric loss spectra, including the excess wing. | Session 163: Molecular Glasses and Liquids |
| 2214 | Dynamics of machine-learned softness in supercooled liquids | Ridout, Sean; Liu, Andrea | Here we develop a phenomenological model for how the softness of particles evolves in time in and out of equilibrium. | Session 163: Molecular Glasses and Liquids |
| 2215 | Jump-Precursor State and a Lengthening Rate-Exchange Time in the Crossover Region of Supercooled o-Terphenyl | Kaur, Harveen; Berg, Mark | The same methods applied to single-molecule data [Phys. | Session 163: Molecular Glasses and Liquids |
| 2216 | Development of Coarse-Grained Models for Glass Forming Liquids | Yungbluth, Jack; Savoie, Brett; Caruthers, James; Medvedev, Grigori | In this paper we report on the development of molecular models which are simple enough for fast simulations, but that also possess stable super-cooled liquid and crystalline phases. | Session 163: Molecular Glasses and Liquids |
| 2217 | Are Collective Relaxation Events in Liquids and Glass Bosonic in Nature? | Cicerone, Marcus | We will present evidence through the temperature dependence of Φ_0 that these fundamental relaxation events (upon which all other relaxation events are built) are bosonic excitations in the liquid or glass. | Session 163: Molecular Glasses and Liquids |
| 2218 | A Simple New Way to Account for Free Volume in Glassy Dynamics: Model-Free Estimation of the Close-Packed Volume from PVT Data | White, Ronald; Lipson, Jane E | We explained this behavior mechanistically through the cooperative free volume rate model (CFV). | Session 163: Molecular Glasses and Liquids |
| 2219 | Connection between liquid and glassy states in water | Martelli, Fausto; Leoni, Fabio; Sciortino, Francesco; Russo, John | Here, we develop a Neural Network scheme capable of discerning local structures beyond tetrahedrality. | Session 163: Molecular Glasses and Liquids |
| 2220 | Anatomy of Voltage-Controlled Magnetic Anisotropy in Heterostructures with Atomically-Thin Heavy Metals | Kwon, Sohee; SUN, QILONG; Mahfouzi, Farzad; Wang, Kang-Lung; Amiri, Pedram; Kioussis, Nicholas | Employing ab initio electronic structure calculations we propose a MgO/ X/FeCo/MgO heterostructure, where X is an atomically-thin late transition metal (Ir, Pt, Rh), which exhibits both giant perpendicular magnetic anisotropy (PMA) and VCMA efficiency, where the former (latter) is one (one to two) order of magnitude higher than the values reported to date. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2221 | Determination of anisotropy constants of ferromagnetic multilayers via fitting of Stoner-Wohlfarth Model | Peterson, Sean; Idzerda, Yves | In this work the anisotropy energy was considered for both the bulk and the interface of ferromagnetic films. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2222 | First Principles Study of Magnetic Properties of Cr1+δTe2 | Huang, Zi Chao; Kong, Jian Feng; Fujisawa, Yuita; Okada, Yoshinori; Soumyanarayanan, Anjan; Khoo, Khoong Hong | Recent experimental efforts have demonstrated growth of Cr 1+δTe 2 films in the NiAs-type crystal structure over a wide range of δ values. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2223 | Magnetic anisotropy modification in a garnet ferrimagnet by interfacial spin orbit coupling | Wu, Guanzhong; Wang, Dongying; Verma, Nish; Cheng, Yang; Guo, Side; Cao, Guixin; Watanabe, Kenji; Taniguchi, Takashi; Lau, Chun Ning; Yang, Fengyuan; Randeria, Mohit; Bockrath, Marc; Hammel, P Chris | Here we report that a perpendicular magnetic anisotropy (PMA) is induced at the interface between YIG and a low symmetry high SOC semimetal, WTe 2. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2224 | New Co-Fe-N Magnetic Compounds Found Through Combined Computational and Experimental Methods | Balasubramanian, Balamurugan; Pahari, Rabindra; Wang, Cai-Zhuang; Xu, Xiaoshan; Ho, Kai-Ming; Sellmyer, David | Here we present the structure and magnetism of new compounds created by incorporating nitrogen and/or silicon in the interstitial or substitutional occupancies of Co, Fe, and FeCo. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2225 | Monte Carlo Simulations Exploring the Impact of Anisotropy on the Equilibrium Properties of Magnetic Tunnel Junction-Based Molecular Spintronics Device | Dahal, Bishnu; Savadkoohi, Marzieh; Grizzle, Andrew; Amir, Uzma; Suh, Pius; D’Angelo, Christopher; Tyagi, Pawan | This MCS study represents covalently bonded paramagnetic molecules across the edges of the magnetic tunnel junction (MTJ) with two FMs. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2226 | Large anisotropic magnetocaloric effect of MnP alloy: A theoretical study | Tran, Hung; Fukushima, Tetsuya; Momida, Hiroyoshi; Sato, Kazunori; Makino, Yukihiro; Oguchi, Tamio | Several rotating magnetocaloric materials have been reported in the previous experimental works, motivating us to study the rotating magnetocaloric effect in a theoretical framework. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2227 | Usage of Ce for the intrinsic properties of rare-earth permanent magnets | Matsumoto, Munehisa; Shishido, Hiroaki | There can be a trade-off among those preferred properties for rare-earth permanent magnets and we discuss a resolution of it based on an importance sampling approach in the virtual materials space. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2228 | Tailoring magnetism in self-intercalated Cr1+δTe2 epitaxial films | Fujisawa, Yuita; Almanza, Markel; Garland, Jennifer; Yamagami, Kohei; Zhu, Xing; Chen, Xiaoye; Araki, Kosei; Takeda, Takahito; Kobayashi, Masaki; Takeda, Yukiharu; Hsu, Chia-Hsiu; Chuang, Feng-Chuan; Laskowski, Robert; Khoo, Amy; Soumyanarayanan, Anjan; Okada, Yoshinori | Here, we investigated magnetic properties of Cr 1+δTe 2 epitaxial films with varying δ. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2229 | The Néel vector control in antiferromagnetic CrSb by electron filling, strain, and electric field | Park, In Jun; Kwon, Sohee; Lake, Roger | We performed density functional theory calculations to investigate the effects of strain, band filling, and electric field on the magnetic anisotropy energy (MAE) of bulk and thin-film CrSb. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2230 | Magnetic Anisotropy, Anisotropic Magnetoresistance, and Planar Hall Effect in Phase-Separated (La1-yPry)1-xCaxMnO3 Thin Films | Paykar, Ashkan; Biswas, Amlan | We observed anisotropic magnetoresistance (AMR) associated with the magnetic anisotropy at low magnetic fields. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2231 | Intrinsic Exchange Bias in Epitaxial CoFe2O4/Al2O3 thin film | Yang, Detian; Yun, Yu; Xu, Xiaoshan | The structural analysis using time-resolved reflection high energy electron diffraction during the growth, suggests that an AFM layer has developed between the substrate and the CoFe2O4 thin film. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2232 | Novel database driven method for discovering new Co-based ferromagnets | Byland, Journey; Shi, Yunshu; Ding, Shaoqing; Mata, Rogelio; Magliari, Haley; Parker, David; Palasyuk, Andriy; Budko, Sergey; Canfield, Paul; Klavins, Peter; Taufour, Valentin | From this data, we illustrate how we discovered new ferromagnets with Curie temperature above room temperature, and uniaxial anisotropy. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2233 | Suppression of first-order transition and large magnetocaloric effect in Mn50-xNi40In10+x | Lehmann, Zachary; Flesche, Matthew; Paudel, Tula; Kharel, Parashu | We have investigated Mn 50-xNi 40In 10+x alloys prepared by arc melting and vacuum annealing. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2234 | Magnetic and structural properties of Co(Fe)-Ni-Al(Ga) Heusler alloys | Miroshkina, Olga; Gruner, Markus; Buchelnikov, Vasiliy; Sokolovskiy, Vladimir | In this work, we report on systematic first-principle investigations of the structural and magnetic properties of Co 2NiAl, Fe 2NiAl, and Fe 2NiGa-based Heusler alloys. | Session 164: Magnetic Anisotropy: Measurement, Materials and Devices |
| 2235 | Moiré magnetism | Hejazi, Kasra; Luo, Zhu-Xi; Balents, Leon | We introduce a general framework to study moiré structures of two-dimensional Van der Waals magnets using continuum field theory. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2236 | Magnetism in substitutionally doped TMDs: magnetic ground states and critical temperatures | Tiwari, Sabyasachi; Van de Put, Maarten; Soree, Bart; Vandenberghe, William | In this work, we theoretically model the magnetic structure of TMDs (MoSe 2, WSe 2, MoS 2, WS 2, and MoTe 2) substitutionally doped with all period four metals (Ti, V, Cr, Mn, Fe, Co, and Ni), using a combination of density functional theory and the Monte-Carlo algorithm. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2237 | Magnetic interactions in 2D layered van der Waals semiconductors CrPS4 and MnPSe3 probed with neutron scattering | Calder, Stuart; Haglund, Amanda; Liu, Yaohua; Pajerowski, Daniel; Cao, Huibo; Williams, Travis; Kolesnikov, Alexander; Garlea, Vasile; Mandrus, David | We present results using elastic and inelastic neutron scattering on powder samples that reveal detailed insights into the magnetic interactions in two systems: CrPS 4 and MnPSe 3. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2238 | Theoretical prediction of a two-dimensional in-plane antiferromagnetic insulator | Sarkar, Anan Bari; Ghosh, Barun; Singh, Bahadur; Bhowmick, Somnath; Lin, Hsin; Bansil, Arun; Agarwal, Amit | Here, we predict a thermodynamically stable 2D magnetic material, K 2CoS 2, which retains its in-plane bulk antiferromagnetic (AFM) order down to the monolayer and bilayer limits [1]. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2239 | Layered Antiferromagnetism Induces Large Negative Magnetoresistance in the van der Waals Semiconductor CrSBr | Telford, Evan; Dismukes, Avalon; Lee, Kihong; Cheng, Minghao; Wieteska, Jedrzej; Bartholomew, Amymarie; Chen, Yu-sheng; Xu, Xiaodong; Narayan, Abhay; Zhu, Xiaoyang; Dean, Cory; Roy, Xavier | Here we report the magnetic and electronic properties of CrSBr, an air-stable vdW antiferromagnetic semiconductor that readily cleaves perpendicular to the stacking axis. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2240 | Detecting spin-crossover transitions with two-dimensional materials. | Boix-Constant, Carla; Mañas-Valero, Samuel; Coronado, Eugenio | In this work, we fabricate hybrid van der Waals heterostructures based on SCO and inorganic two-dimensional (2D) materials. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2241 | Exchange-driven magnetostriction in Two-dimensional Magnets | Jiang, Shengwei; Xie, Hongchao; Shan, Jie; Mak, Kin Fai | Here we demonstrate an exchange-driven magnetostriction effect in mechanical resonators made of two-dimensional antiferromagnetic CrI 3. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2242 | Neutron scattering studies of the quasi-2D antiferromagnet CrCl3 | Schneeloch, John; Louca, Despina; Tao, Yu | To elucidate structural and magnetic behavior, we performed neutron scattering experiments on CrCl 3. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2243 | Complex spin dynamics in layered CrBr3 | Siddiqui, Saima; Sklenar, Joseph; Lebedev, Dmitry; Gish, Tyler; Hersam, Mark; Hoffmann, Axel | Towards this end, we investigated the rich spin dynamics in a layered CrBr 3 crystal using magnetic resonance phenomena. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2244 | Observations of layer-dependent spin waves in atomically thin Ising magnets | Xie, Hongchao; Ye, Zhipeng; Ye, Gaihua; Tian, Shangjie; Lei, Hechang; Sun, Kai; He, Rui; Zhao, Liuyan | In this presentation, I will show our experimental findings of spin waves and correspondig selection rules in few-layer CrI 3 using polarization-resolved magneto-Raman spectroscopy and discuss the magnetic field dependence of these spin waves and their responses across the critical magnetic fields. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2245 | Towards predictive models of transition metal intercalation – A study of non-dilute Iron diffusion in 2H-TaS2 | Craig, Isabel; Inzani, Katherine; Griffin, Sinéad | To estimate the diffusive behavior, we construct an on-lattice diffusion model to calculate the diffusion constants at a set of characteristic temperatures and intercalation densities using Kinetic Monte Carlo. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2246 | Interlayer magnetism in Fe3−xGeTe2 | Kong, Xiangru; Nguyen, Giang; Lee, Jinhwan; Lee, Changgu; Calder, Stuart; May, Andrew; Gai, Zheng; Li, An-Ping; Liang, Liangbo; Berlijn, Tom | Interlayer magnetism in Fe3−xGeTe2 | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2247 | Effective tuning of magnetic structure in Ni1-xMnxPS3 | Hu, Jin; Basnet, Rabindra; Pandey, Krishna; Acharya, Gokul; Nabi, Md Rafique Un; Wegner, Aaron | Here, we report the tunable magnetic structure in a new class of AFM van-der Waals Ni 1-xMn xPS 3 system. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2248 | Theoretical study on the magnetic structure of few-layer transition metal phosphorus sulfides | Kim, Tae Yun; Park, Cheol-Hwan | In this contribution, we present an in-depth investigation of the magnetic structure of few-layer TMPS 3 based on the results of our first-principles calculations. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2249 | Magnetic order induced polarization anomaly of Raman scattering in 2D magnet CrI3 | Zhang, Yujun | Previous research on the spin-phonon coupling effect mainly focuses on the renormalization of phonon frequency.Here we demonstrate that the Raman polarization selection rules of optical phonons can be greatly modified by the magnetic ordering in 2D magnet CrI 3. | Session 165: Order and Excitations in Van Der Waals Magnets |
| 2250 | Monte Carlo simulation of a strong SOC model for d1 double perovskite | Cong, Rong; Mitrovic, Vesna | In an attempt to associate possible spin and orbital patterns with these NMR findings, we performed Monte Carlo simulations to study a microscopic model for d 1 double perovskites magnetic Mott insulators with strong spin orbit coupling and multipolar spin interactions [2]. | Session 166: Perovskites |
| 2251 | 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; Melendez-Sans, Anna; Utsumi, Yuki; Meneghin, Federico; Ha, Duy; Yen, Chien-Han; Chen, Kai; Kuo, Chang-Yang; Liao, Yen-Fa; Tsuei, Ku-Ding; Morrow, Ryan; Wurmehl, Sabine; Büchner, Bernd; Prasad, Beluvalli-Eshwarappa; Jansen, Martin; Komarek, Alexander; Hansmann, Philipp; Tjeng, Liu | 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. | Session 166: Perovskites |
| 2252 | Effects of charge doping a Mott insulator with strong spin-orbit coupling | Garcia, Erick; Forino, Paola; Cong, Rong; Tran, Phuong; Tassetti, Anna; Allodi, Giuseppe; Reyes, Arneil; Woodward, Pat; Sanna, Samuele; Mitrovic, Vesna | Specifically, in this talk, we present a comprehensive study of the electron-doped powder, double perovskite Ba 2Na 1-xCa xOsO 6 through the Na/Ca partial substitution using nuclear magnetic resonance (NMR), muon spin relaxation (uSR), and superconducting quantum interference device (SQUID) measurements for 0 < x < 1. | Session 166: Perovskites |
| 2253 | Knight shift anisotropy as a function of charge doping in a Mott insulator with strong spin-orbit coupling | Gao, Zhenxiang; Cong, Rong; Garcia, Erick; Mitrovic, Vesna | We present a detailed analysis of NMR powder spectral patterns of the double perovskite Ba2Na1-xCaxOsO6 (0 < x < 1), a charge doped Mott insulator with strong spin-orbit coupling (SOC). | Session 166: Perovskites |
| 2254 | First-principles study of the electronic, magnetic, and crystal structure of perovskite molybdates | Lee-Hand, Jeremy; Hampel, Alexander; Dreyer, Cyrus | We use first-principles methods based on density functional theory to explore the electronic, crystal, and magnetic structure of these materials. | Session 166: Perovskites |
| 2255 | Electronic structure of epitaxially strained Sr2CrReO6 | Marcaud, Guillaume; Lee, Alex; Hauser, Adam; Yang, Fengyuan; Lee, Sangjae; Casa, Diego; Upton, Mary; Gog, Thomas; yilinwang@bnl.gov, yilin; mpmdean@gmail.com, Mark; Zhou, Hua; Walker, Frederick; Jarrige, Ignace; Ismail-Beigi, Sohrab; Ahn, Charles | Electronic structure of epitaxially strained Sr2CrReO6 | Session 166: Perovskites |
| 2256 | Iridium on the fcc lattice: new design principles for realizing Jeff = ½ moments and significant Kitaev interactions | Aczel, Adam | In this talk, I will discuss how spacing the iridium ions further apart and incorporating anions with low electronegativities into the crystal structure are useful design criteria for achieving unprecedented proximity to the ideal J eff = ½ limit. | Session 166: Perovskites |
| 2257 | BCS-BEC crossover in a (t2g)4 excitonic magnet | Kaushal, Nitin; Soni, Rahul; Nocera, Alberto; Alvarez, Gonzalo; Dagotto, Elbio | We provide the full λ (spin-orbit coupling) versus Coulomb correlation (U) phase diagrams for both one- and two-dimensional lattices calculated using density matrix renormalization group and Hartree-Fock approximation, respectively [4]. | Session 166: Perovskites |
| 2258 | Phase coexistence and negative thermal expansion in the triple perovskite iridate Ba3CoIr2O9 | Garg, Charu; Roy, Deepak; Lonsky, Martin; Manuel, Pascal; Cervellino, Antonio; Müller, Jens; Kabir, Mukul; Nair, Sunil | We present a hitherto unreported Ba 3CoIr 2O 9, stabilizing in the hexagonal P6 3/mmc symmetry at 300K, it exhibits a magneto-structural transition to a monoclinic C2/c phase at 107 K – the highest known amongst all the triple perovskite iridates. | Session 166: Perovskites |
| 2259 | Magnetic tunnel junctions and magnetic logic circuits driven by spin-orbit torques | Gambardella, Pietro | This talk will present time-resolved measurements of magnetization reversal driven by SOTs in 3-terminal MTJ devices and show how the combination of SOT, spin transfer torque, and voltage control of magnetic anisotropy leads to reproducible sub-ns magnetization reversal with a very narrow spread of the switching time distributions [1, 2]. | Session 167: Spin-Orbit Torques |
| 2260 | Deterministic switching of a perpendicularly polarized magnet using unconventional spin-orbit torques in WTe2 | Kao, I hsuan; Muzzio, Ryan; Zhang, Hantao; Zhu, Menglin; Gobbo, Jacob; Weber, Daniel; Rao, Rahul; Li, Jiahan; Edgar, James; Goldberger, Joshua; Yan, Jiaqiang; Mandrus, David; Hwang, Jinwoo; Cheng, Ran; Kotach, Jyoti; Singh, Simranjeet | The exploitation of low-crystal symmetries in emergent quantum materials offers a unique approach to achieve spin-orbit torque with unconventional form 5,6. | Session 167: Spin-Orbit Torques |
| 2261 | Effect of interfacial intermixing on spin-orbit torque in Co/Pt bilayers | Baez Flores, Giovanni; Belashchenko, Kirill | Using the first-principles non-equilibrium Green’s function technique [1] with supercell disorder averaging, we study the influence of interfacial intermixing on the spin-orbit torque in Co/Pt (111) bilayers. | Session 167: Spin-Orbit Torques |
| 2262 | Voltage Controlled Spin-Orbit Torque Switching in W/CoFeB/MgO | Xu, Jinsong; Chien, Chia-Ling | In this work, we show voltage-controlled spin-orbit torque (SOT) switching in W/CoFeB/MgO films with perpendicular magnetic anisotropy (PMA) as administered through SrTiO 3 with a high dielectric constant. | Session 167: Spin-Orbit Torques |
| 2263 | Strong, anisotropic in-plane and out-of-plane damping-like spin-orbit torque in epitaxial RuO2 | Bose, Arnab; Schreiber, Nathaniel; Nair, Hari; Zhang, Xiyue; Jain, Rakshit; Cham, Thow Min Jerald; Sun, Jiaxin; Muller, David; Buhrman, Robert; Schlom, Darrell; Ralph, Daniel | We study spin torques in RuO 2/Permalloy bilayers grown on TiO 2 substrates by second-harmonic Hall and spin-torque ferromagnetic resonance techniques [1]. | Session 167: Spin-Orbit Torques |
| 2264 | Prediction of Purely Interfacial Giant Antidamping Spin-Orbit Torque induced by Skew Scattering | Veneri, Alessandro; Ferreira, Aires | In this talk, we present a new microscopic framework that accounts for intrinsic and extrinsic transport effects on equal footing and nonperturbatively, for the first time [2-3]. | Session 167: Spin-Orbit Torques |
| 2265 | Spin-Orbit Torque Switching of Ferromagnets and Antiferromagnets | Chien, Chia-Ling | We discuss schemes that can achieve field-free SOT switching of FM with perpendicular magnetic anisotropy (PMA). | Session 167: Spin-Orbit Torques |
| 2266 | Electric field induced exceptional points and mode attraction in a spin-orbit torque oscillator | Proskurin, Igor; Stamps, Robert | We consider resonant spin-orbit torque system in applied electric field and demonstrate that this system can realize exceptional points in the energy spectrum of the magnetic oscillator. | Session 167: Spin-Orbit Torques |
| 2267 | Magneto-Optical Detection of Spin-Orbit Torque Phenomena Using Sagnac Interferometer microscope | Huang, Zhengjie; Vetter, Eric; Xiong, Yuzan; Zhang, Wei; Sun, Dali | Our work provides a promising continuous-wave magneto-optical approach to optically characterize the static spin Hall angle in a range of SOT devices without the AC current modulation. | Session 167: Spin-Orbit Torques |
| 2268 | Spin transparency of Pt-based heavy metal/ferromagnet interface | Zhu, Lijun; Ralph, Daniel; Buhrman, Robert | In this talk, we will discuss the strategies developed to effectively minimize or even eliminate spin backflow and spin memory loss. | Session 167: Spin-Orbit Torques |
| 2269 | Thermal stability and memristive spin-orbit torque switching at elevated temperature | Liao, Wei-Bang; Chen, Tian-Yue; Hsiao, Yu-Chan; Pai, Chi-Feng | In this work, through comprehensive temperature-dependent study on standard W/CoFeB/MgO and field-free CoFeB/W/CoFeB/MgO devices, the SOT efficacies of both are found to be invariant from 298 K to 353 K. 1 Δ is shown to degrade with increasing the temperature. | Session 167: Spin-Orbit Torques |
| 2270 | Silicon Colour Centres | Simmons, Stephanie | In this talk I will introduce a variety of silicon colour centres and discuss their properties in isotopically purified silicon-28. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2271 | Quantum information science with rare earths | Paudyal, Durga | We provide an overview of rare earth-doped material properties and summarize some of the most promising oxide host materials studied from ab-initio electronic structure methods that take care of critically important electron correlation, spin orbit coupling, crystal field, quadrupolar and hyperfine interactions, and Zeeman effect to identify and realize quantum states in the gap regime. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2272 | Towards quantum communication nodes using nuclear spins in silicon carbide electronics | Bourassa, Alexandre; Anderson, Christopher; Miao, Kevin; Onizhuk, Mykyta; Ma, He; Wolfowicz, Gary; Crook, Alexander; Mintun, Peter; Abe, Hiroshi; Ul-Hassan, Jawad; Son, Nguyen; Ohshima, Takeshi; Galli, Giulia; Awschalom, David | Here, we demonstrate high fidelity initialization (>99%) and gates (99.984%), as well as extended dephasing (40x improvement) and decoherence (>14 ms) times in this system. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2273 | Discovery and Optical Characterization of Hidden Silicon-Vacancy Centers in Diamond | Smallwood, Christopher; Ulbricht, Ronald; Day, Matthew; Schröder, Tim; Bates, Kelsey; Autry, Travis; Diederich, Geoffrey; Bielejec, Edward; Siemens, Mark; Cundiff, Steven | Here we report a series of novel measurements [1] on a high-density sample of a particular color-center type—negatively charged silicon-vacancy (SiV -) centers in diamond—using collinear optical multidimensional coherent spectroscopy (MDCS). | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2274 | Hybridized defects in solid-state materials as artificial molecules | Ciccarino, Christopher; Wang, Derek; Flick, Johannes; Narang, Prineha | Here we present the formation of `artificial molecules’ in solids, introducing a new degree of freedom in control of quantum optoelectronic materials. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2275 | Photoluminescence and Electron-hole Recombination of Defects as Single Photon Emitters in Hexagonal Boron Nitride | LI, Kejun; Smart, Tyler; Ping, Yuan | To unambiguously identify defects responsible for the experimentally detected single-photon emissions in hexagonal boron nitride, we theoretically investigate the photoluminescence and electron-hole recombination mechanism (radiative and nonradiative) of defect candidates, especially carbon related defects. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2276 | Intersystem Crossing and Exciton-Defect Coupling of Spin Defects in Hexagonal Boron Nitride | Smart, Tyler; LI, Kejun; Xu, Junqing; Ping, Yuan | Here we established a complete theoretical framework to accurately and systematically design new quantum defects in wide-bandgap 2D systems. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2277 | Broadening mechanisms of quantum emitters in CVD and exfoliated hexagonal Boron nitride at temperatures ranging 4K-300K on conductive and insulating substrates | Akbari, Hamidreza; Lin, Wei-Hsiang; Vest, Benjamin; Jha, Pankaj; Atwater, Harry | Here we study photoluminescence of hBN single emitters via variable temperature (4K-300K) spectroscopy and compare exfoliated, chemically vapor deposition (CVD) grown and bulk hBN crystals. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2278 | Exploring radiative properties of quantum emitters in boron nitride with excited state calculations and Bayesian analysis | Gao, Shiyuan; Chen, Hsiao-Yi; Bernardi, Marco | Our work advances the microscopic understanding of hBN single-photon emitters and introduces a computational framework to systematically investigate quantum emitters in 2D materials. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2279 | First-principles characterization of the nitrogen vacancy center in 4H-SiC | Zhu, Yizhi; Kovos, Berk; Onizhuk, Mykyta; Awschalom, David; Galli, Giulia | We find significant enhancement in T 2 and T 2* for basal defects compared to the axial ones, and we discuss similarities and differences with the corresponding quantities obtained for the divacancy in SiC. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2280 | Room temperature photon statistics of hexagonal boron nitride quantum emitters | Jha, Pankaj; Parazzoli, Claudio; Akbari, Hamidreza; Capron, Barbara; Koltenbah, Benjamin; Atwater, Harry | In this work, we investigate the spectral and intensity fluctuations of emission from hBN color centers triggered by laser pulses. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2281 | First-principles Studies of Strongly Correlated States in Defect Spin Qubits in Diamond | Sheng, Nan; Ma, He; Govoni, Marco; Galli, Giulia | Using a recently developed quantum embedding theory [1], we present first-principles calculations of strongly correlated states of spin defects in diamond [2]. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2282 | First-principles calculations of defect-phonon coupling of a spin-1/2 state from a charged carbon impurity in two-dimensional transition-metal dichalcogenides | Lee, Jun-Ho; Haber, Jonah; Neaton, Jeffrey | Here, we present studies of a novel point defect, a negatively-charged carbon impurity substituting for a chalcogen atom, in transition-metal dichalcogenides (TMDs) monolayers that has been recently realized experimentally [arXiv:2008.12196] and can be generated deliberately with atomic precision. | Session 168: Materials for Quantum Information Science – 3 (Novel Materials Systems) |
| 2283 | Square skyrmion, meron and vortex crystals in centrosymmetric tetragonal magnets | Wang, Zhentao | Here, we present a new guiding principle for finding square skyrmion, meron and vortex crystals (double-Q ordering) in centrosymmetric tetragonal magnets even in the absence of magnetic field. | Session 169: Topological Textures in Itinerant Magnets |
| 2284 | Imaging the coupling between itinerant electrons and localised moments in the centrosymmetric skyrmion magnet GdRu2Si2 | Yasui, Yuuki; Butler, Christopher; Khanh, Nguyen; Hayami, Satoru; Nomoto, Takuya; Hanaguri, Tetsuo; Motome, Yukitoshi; Arita, Ryotaro; Arima, Taka-hisa; Tokura, Yoshinori; Seki, Shinichiro | We performed spectroscopic-imaging scanning tunneling microscopy experiments on GdRu 2Si 2 to investigate the nature of the coupling between itinerant electrons and localized magnetic moments. | Session 169: Topological Textures in Itinerant Magnets |
| 2285 | Formation mechanism of helical Q structure in Gd-based skyrmion materials | Nomoto, Takuya; Koretsune, Takashi; Arita, Ryotaro | Using the ab initio local force method, we investigate the formation mechanism of the helical spin structure in GdRu 2Si 2 and Gd 2PdSi 3[4]. | Session 169: Topological Textures in Itinerant Magnets |
| 2286 | Chiral electric transport signatures in magnetic skyrmions and chiral helimagnets | Lux, Fabian; Prass, Pascal; Freimuth, Frank; Bluegel, Stefan; Mokrousov, Yuriy | In this talk, we present the geometrical foundation of this effect and theoretically uncover its manifestations in a two-dimensional Rashba electron gas. | Session 169: Topological Textures in Itinerant Magnets |
| 2287 | Construction of low energy effective Hamiltonians using supervised machine learning. | Sharma, Vikram; Wang, Zhentao; Batista, Cristian | We propose a simple supervised machine learning (ML) algorithm to find the low energy spin Hamiltonian for a given labeled energy data-set from a “high energy” s-d model. | Session 169: Topological Textures in Itinerant Magnets |
| 2288 | Decoding of complex magnetic structures from Hall-effect measurements | Bouaziz, Juba; Ishida, Hiroshi; Lounis, Samir; Bluegel, Stefan | We introduce a missing contribution, the non-collinear Hall effect (NHE). | Session 169: Topological Textures in Itinerant Magnets |
| 2289 | Nonlinear optical responses in chiral magnetic metals | Okumura, Shun; Morimoto, Takahiro; Kato, Yasuyuki; Motome, Yukitoshi | We theoretically study such nonlinear optical responses in a chiral conical magnetic state as a prototypical example. | Session 169: Topological Textures in Itinerant Magnets |
| 2290 | Defect-implantation for the all-electrical detection of non-collinear spin-textures | Lima Fernandes, Imara; Bouhassoune, Mohammed; Lounis, Samir | We demonstrate that atomic defects enable highly efficient all-electrical detection of spin-swirling textures [1], in particular magnetic skyrmions, which are promising bit candidates in future spintronics devices. | Session 169: Topological Textures in Itinerant Magnets |
| 2291 | Incommensurate magnetic ordering in CrB2 | Deák, András; Jackson, Jerome; Nyári, Bendegúz; Szunyogh, László | We investigate magnetic ordering in the non-collinear antiferromagnet CrB 2. | Session 169: Topological Textures in Itinerant Magnets |
| 2292 | Skyrmion size dependence of the topological Hall effect: A real-space calculation | Matsui, Akira; Nomoto, Takuya; Arita, Ryotaro | In this study, we numerically investigate THE in systems with various skyrmion sizes. | Session 169: Topological Textures in Itinerant Magnets |
| 2293 | Magnetic Fields in the Topological Hall Effect | Skomski, Ralph; Ullah, Ahsan; Pahari, Rabindra; Balasubramanian, Balamurugan; Sellmyer, David | We show that this variation leads to a generally very large effect that looks like a THE signal but is unrelated to the nanoscale Berry phase. | Session 169: Topological Textures in Itinerant Magnets |
| 2294 | Towards skyrmionic spin textures combined with SrTiO3 two-dimensional electron gases | Moreno, Luis; Mallik, Srijani; Marcano, Lourdes; Bouzehouane, Karim; Valencia, Sergio; Reyren, Nicolas; Barthélémy, Agnès; Bibes, Manuel | In this presentation we will show that the metal oxide (e.g. AlOx) thus formed can be combined with ferromagnetic and heavy-metal-based ultrathin films to generate various types of magnetization configurations with in-plane or out-of-plane anisotropy, depending on their thicknesses. | Session 169: Topological Textures in Itinerant Magnets |
| 2295 | Strain Induced Modulation of Dzyaloshinskii-Moriya interaction in Pt/Co Bilayer Devices: A Green’s Function Approach. | Mahfouzi, Farzad; Kioussis, Nicholas | We introduce a Greens function approach to calculate the DMI coefficients that compared to the super-cell and Generalized Bloch approaches is computationally more efficient and accurate. | Session 169: Topological Textures in Itinerant Magnets |
| 2296 | Magnon Landau Levels and Spin Responses in Antiferromagnets | Kovalev, Alexey; Li, Bo | We study gauge fields produced by gradients of the Dzyaloshinskii-Moriya interaction and propose a model of AFM topological insulator of magnons. | Session 170: Magnetic Excitations |
| 2297 | Magnetism-dependent phonons and its effect on magnetic phase transition from first principles | Tanaka, Tomonori; Gohda, Yoshihiro | In this presentation, we introduce the impact of the magnetism-dependent phonon on the magnetic phase transition and the electronic origin of the dependence. | Session 170: Magnetic Excitations |
| 2298 | Spin-wave emission in skyrmion-antiskyrmion bilayers | Diaz, Sebastian; HIROSAWA, TOMOKI; Loss, Daniel; Psaroudaki, Christina | Here, we propose that skyrmion-antiskyrmion bilayers form topological charge dipoles and act as efficient sub-100 nm SW emitters when excited by in-plane ac magnetic fields [1]. | Session 170: Magnetic Excitations |
| 2299 | Signatures of a Liquid-Crystal Transition in Spin-Wave Excitations of Skyrmions | Mohanta, Narayan; Christianson, Andrew; Okamoto, Satoshi; Dagotto, Elbio | Inside the SkX, we find six spin-wave modes, which are supplemented by another mode originating from the ferromagnetic background. | Session 170: Magnetic Excitations |
| 2300 | Anomalous spin excitation spectra in honeycomb systems Na2+xM2TeO6 (M=Co and Ni) with zig-zag magnetic ordering | Garlea, Vasile; Samarakoon, Anjana; Chen, Qiang; Zhou, Haidong | The role played by the magnetic frustration arising from competing exchange interactions on the magnetic properties of honeycomb systems continues to be the subject of intense research. | Session 170: Magnetic Excitations |
| 2301 | Magnon-polaritons in hematite α-Fe2O3 | Bialek, Marcin; Zhang, Jianyu; Yu, Haiming; Ansermet, Jean-Philippe | We study coupling of electromagnetic waves to magnetization waves at THz frequencies [1]. | Session 170: Magnetic Excitations |
| 2302 | Controlling the magnon-photon interface via a cavity Fano resonance | Gollwitzer, Jakob; Bocklage, Lars; Meier, Guido; Röhlsberger, Ralf | Here, we present a new scheme to achieve spectral control of magnon-photon coupling via Fano interference. | Session 170: Magnetic Excitations |
| 2303 | Skyrmion mass from spin-phonon interaction | Capic, Daniel; Chudnovsky, Eugene; Garanin, Dmitry | Skyrmion mass from spin-phonon interaction | Session 170: Magnetic Excitations |
| 2304 | Magnetic resonance imaging of spin-wave transport and interference in a magnetic insulator | Bertelli, Iacopo; Carmiggelt, Joris; Yu, Tao; Simon, Brecht; Pothoven, Coosje; Bauer, Gerrit; Blanter, Yaroslav; Aarts, Jan; van der Sar, Toeno | Using electron spins in diamond, we introduce a phase-sensitive detection scheme to image spin waves via their magnetic field, which we use to quantify the spin-wave precession amplitude in YIG and image spin-wave interference and caustics. | Session 170: Magnetic Excitations |
| 2305 | Electrical generation and tunable routing of domain wall spin waves in van der Waals antiferromagnets | Rahman, Mohammad Mushfiqur; Rustagi, Avinash; Upadhyaya, Pramey | In this work, we show that layered van der Waals antiferromagnets with recently demonstrated voltage control of magnetic order [Nat. | Session 170: Magnetic Excitations |
| 2306 | Skyrmions and antiskyrmions from current-induced boundary instabilities | Sandhoefner, Shane; Raeliarijaona, Aldo; Nepal, Rabindra; Snyder-Tinoco, Dalton; Kovalev, Alexey | We study generation and dynamics of skyrmions and antiskyrmions using current-induced torques at edges of magnetic regions with DMI (Dzyaloshinskii-Moriya interaction). | Session 170: Magnetic Excitations |
| 2307 | Theory of electromagnon-mediated spin pumping | Masuda, Keisuke; Sato, Masahiro | In the present work, we theoretically study the SP in a multiferroicmagnet, focusing on its spiral ordered phase such as perovskite manganites RMnO 3. | Session 170: Magnetic Excitations |
| 2308 | Spin waves in cylindrical nanowires in the vortex state | CASO PARAJON, DIEGO; Bran, Cristina; Garcia, Javier; Vazquez, Manuel; Guslienko, Konstantin; Aliev, Farkhad | Here, we present experimental results of dynamic stimulation of Fe28Co63Cu10 NWs with 120 nm diameter and 25 micron length. | Session 170: Magnetic Excitations |
| 2309 | Competing magnetic orders and multipolar Weyl fermions in 227 pyrochlore iridates. | Ladovrechis, Konstantinos; Roy, Bitan; Meng, Tobias | In this work, we focus on an effective low-energy Luttinger model accounting for a quadratic band touching (QBT) around the Γ point, and study interaction-induced instabilities of the QBT. | Session 171: Pyrochlore Systems |
| 2310 | Cluster Frustration in the Breathing Pyrochlore Magnet LiGaCr4S8 | Paddison, Joseph; Pokharel, Ganesh; Suriya Arachchige, Hasitha; Williams, Travis; May, Andrew; Fishman, Randy; Sala, Gabriele; Calder, Stuart; Ehlers, Georg; Parker, David; Hong, Tao; Wildes, Andrew; Mandrus, David; Christianson, Andrew | We present a comprehensive neutron scattering study of the breathing pyrochlore magnet LiGaCr 4S 8 [1]. | Session 171: Pyrochlore Systems |
| 2311 | Beyond Single Tetrahedron Model of the Breathing Pyrochlore Material Ba3Yb2Zn5O11 | Dissanayake, Sachith; Shi, Zhenzhong; Rau, Jeffrey; Steinhardt, William; Bag, Rabindranath; Butch, Nicholas; Frontzek, Matthias; Podlesnyak, Andrey; Graf, David; Choi, Eun Sang; Lang, Franz; Blundell, Stephen; Gingras, Michel J; Haravifard, Sara | In this talk we will present single-crystal field-dependent neutron scattering measurements as well as heat capacity, ultra-sensitive magnetic susceptibility, thermal conductivity, and µSR measurements on Yb-based breathing pyrochlore system, Ba 3Yb 2Zn 5O 11. | Session 171: Pyrochlore Systems |
| 2312 | Neutron Scattering Studies of Tm-Based Breathing Pyrochlore System | Yadav, Lalit; Bag, Rabindranath; Dissanayake, Sachith; Shi, Zhenzhong; Xu, Guangyong; Brown, Craig; Butch, Nicholas; Kolesnikov, Alexander; Lang, Franz; Blundell, Stephen; Haravifard, Sara | In this talk, we are going to present our latest experimental results for the Tm-based breathing pyrochlore compound Ba3Tm2Zn5O11. | Session 171: Pyrochlore Systems |
| 2313 | 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, Chris; Verezhak, Joel; Hu, Haoyu; CHUNG, JAEHO; Xu, Xianghan; Cheong, Sang-Wook; Nallaiyan, Manivannan; Spagna, Stefano; Maple, M Brian; Nevidomskyy, Andriy; Morosan, Emilia; Chen, Gang; Dai, Pengcheng | Until 2019, the first single-crystal study of Ce 2Zr 2O 7, a compound isostructural to Ce 2Sn 2O7, reveals the absence of magnetic ordering/spin-glass down to 20 mK and the presence of a spin excitation continuum at 35 mK. | Session 171: Pyrochlore Systems |
| 2314 | Effective Hamiltonian and dynamics of the dipole-octupole pyrochlore Ce2Zr2O7 | Bhardwaj, Anish; Zhang, Shu; Moessner, Roderich; Nevidomskyy, Andriy; Changlani, Hitesh | We assess the importance of quantum mechanical effects and explore the possibility of the existence of spin ice physics in this material. | Session 171: Pyrochlore Systems |
| 2315 | Low Energy Magneto-optics of Tb2Ti2O7 in [111] Magnetic Field | Zhang, Xinshu; Luo, Yi; Halloran, Thomas; Gaudet, Jonathan; Man, Huiyuan; Koohpayeh, Seyed; Armitage, Peter | We perform time-domain THz spectroscopy on high quality Tb 2Ti 2O 7 crystal and study the low energy excitations as a function of [111] magnetic field with high energy resolution. | Session 171: Pyrochlore Systems |
| 2316 | Specific heat measurements and Monte Carlo simulations of the canted ferromagnetic pyrochlore oxide Yb2Ti2O7 | Hu, Xinzhe; Padgett, Andrew; Yin, Liang; Yadav, Swapnil; Li, Qiuju; Sun, Xuefeng; Takano, Yasumasa | Specific heat measurements and Monte Carlo simulations of the canted ferromagnetic pyrochlore oxide Yb2Ti2O7 | Session 171: Pyrochlore Systems |
| 2317 | Negative Thermal Expansion in a Magnetically Frustrated Spinel | Samanta, Ananya; Yan, Han; Penc, Karlo; Shannon, Nicholas | Here we use classical Monte Carlo simulations to directly calculate the NTE. | Session 171: Pyrochlore Systems |
| 2318 | Magnetometry and transport studies of single-crystal pyrochlore iridates | Pearce, Matthew; Goetze, Kathrin; Szabo, Attila; Sikkenk, Tycho; Lees, Martin; Boothroyd, Andrew; Prabhakaran, Dharmalingam; Castelnovo, Claudio; Goddard, Paul | We present a systematic study of the evolution of these properties with magnetic field, temperature and angle. | Session 171: Pyrochlore Systems |
| 2319 | Quantum Monte Carlo Simulation of an SO(N) Singlet Projector Model on the Pyrochlore Lattice | Sutton, Jared; Block, Matthew | Having studied all two-dimensional lattices of interest, our goal was to expand our computational method’s functionality to be able to handle a three-dimensional lattice, namely the Pyrochlore lattice (Fd3m). | Session 171: Pyrochlore Systems |
| 2320 | Pyrochlore U(1) spin liquid of mixed-symmetry enrichments in magnetic fields | Yao, Xu-Ping; Li, Yaodong; Chen, Gang | We consider the possibility of the π-flux U(1) QSL favored by frustrated transverse exchange interactions rather than the usual quantum spin ice. | Session 171: Pyrochlore Systems |
| 2321 | Machine assisted identification of unconventional order and ground-state selection in a breathing pyrochlore magnet | Sadoune, Nicolas; Liu, Ke; Jaubert, Ludovic; Yan, Han; Pollet, Lode; Shannon, Nicholas | In this work, we apply the tensorial-kernel support-vector-machine (TK-SVM) method to a classical anti-ferromagnet with Dzyaloshinskii–Moriya interaction on the breathing pyrochlore lattice, where we uncover the nature of the q = W phase below a rank-2 U(1) spin liquid found in PRL 124, 127203 (2020). | Session 171: Pyrochlore Systems |
| 2322 | Prediction of Anti-Kramers Antiferromagnetism (AKAF) in doped FeSb2 | Mazin, Igor; Smejkal, Libor; Johannes, Michelle; Gonzalez-Hernandez, Rafael; Koepernik, Klaus | In this talk we concentrate on a well known semiconductor, FeSb 2, and show several highly unexpected features: (1) DFT ground state is not paramagnetic, and not, as suggested by some, ferro-, but antiferromagnetic (AF); (2) two different AF exist, and the most stable one corresponds to the so-called AFMe order, observed experimentally in CrSb 2 (which is NOT AKAF); (3) the energetically favorable AKAF state is metallic, and the nonmagnetic one semiconducting, which is highly unusual; (4) the AFMe order is preferential to the AKAF one, since it has a pseudogap at E F. and the paramagnetic one is realized in nature because of the gap opening; (5) doping with Cr or Co reduces the advantage of (pseudo-)gapping, and in a narrow range of doping the AKAF becomes the ground state. | Session 172: Magnetic Topological Materials 9: Theory |
| 2323 | Pinch-point singularities in spectroscopy guarantee topological criticality | Yan, Han | In this work we discuss how to identify topologically critical gap-closing points from energy and momentum-resolved spectroscopy without any additional knowledge of the system. | Session 172: Magnetic Topological Materials 9: Theory |
| 2324 | Unlocking of time reversal, space-time inversion and rotation invariants in magnetic materials | Yang, Jian; Fang, Chen | Here we show that for elementary excitations in magnetic materials, this “locking” between quantum numbers is lifted: T 2 and (PT) 2 take all four combinations of +1 and −1 regardless of the value of the spin, where T now represents the composite symmetry of time reversal and lattice translation. | Session 172: Magnetic Topological Materials 9: Theory |
| 2325 | Non-Axionic Magnetic Higher-Order Topological Insulators and High-Throughput Magnetic Topological Materials Discovery from Magnetic Topological Quantum Chemistry | Wieder, Benjamin; Xu, Yuanfeng; Elcoro, Luis; Song, Zhida; Garcia Vergniory, Maia; Bradlyn, Barry; Regnault, Nicolas; Chen, Yulin; Felser, Claudia; Bernevig, Andrei | In [Bradlyn*, Elcoro*, Cano*, Vergniory*, Wang*, et al., Nature (2017)], we introduced Topological Quantum Chemistry (TQC) – a real-space predictive theory of band topology in nonmagnetic crystals. | Session 172: Magnetic Topological Materials 9: Theory |
| 2326 | Flavors of noise in a magnetic Weyl semimetal | Zhang, Shu; Tserkovnyak, Yaroslav | In this work, we investigate the magnetic noise induced by the fluctuations of the charge current, the valley (chiral) current and the spin density, respectively. | Session 172: Magnetic Topological Materials 9: Theory |
| 2327 | Analog of Lieb-Schultz-Mattis argument for low dimensional antiferromagnets in the semiclassical sigma model framework | Tanaka, Akihiro; Nonomura, Yoshihiko | We revisit the Lieb-Schultz-Mattis argument as generalized by Oshikawa, and discuss how the program can be carried through in the sigma model + topological term effective action framework for antiferromagnets. | Session 172: Magnetic Topological Materials 9: Theory |
| 2328 | Strong anisotropy and gyrotropy of electromagnetic wave propagation in magnetic Weyl semimetals | Belyanin, Alexey; Chen, QianFan; Oladyshkin, Ivan; Erukhimova, Maria; 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 172: Magnetic Topological Materials 9: Theory |
| 2329 | Topological magnetism in correlated insulators and Weyl semimetals | Nikolic, Predrag | After outlining the theory behind these conclusions, I will discuss the observable implications: magnetic orders with skyrmions and hedgehogs, spin-momentum locking of magnetic excitations, transport properties, and the prospects for 3D quantum spin liquids with topological order. | Session 172: Magnetic Topological Materials 9: Theory |
| 2330 | Topological Hopf insulating phases of magnetic materials | Wang, Yuxin; Goswami, Pallab | To answer this question affirmatively, we have developed third homotopy classification scheme for n-band, Bloch Hamiltonians, belonging to the unitary class, with n≥2. | Session 172: Magnetic Topological Materials 9: Theory |
| 2331 | Controlling a quantum point junction on the surface of an antiferromagnetic topological insulator | Varnava, Nicodemos; Wilson, Justin; Pixley, Jed; Vanderbilt, David | We propose to achieve this control using an antiferromagnetic topological insulator that supports two distinct types of gapless unidirectional channels on its surface, one from antiferromagnetic domain walls and the other from single-height steps. | Session 172: Magnetic Topological Materials 9: Theory |
| 2332 | New topological invariants and real-space constructions of topological states protected by magnetic space group symmetries | Peng, Bingrui; Jiang, Yi; Fang, Chen | Using real-space recipes, we construct all gapped topological states protected by magnetic space groups (MSGs) for free fermion systems with spin-orbit coupling, and enumerate all topological invariants for MSG symmetries and their corresponding surface states, many of which are discovered for the first time. | Session 172: Magnetic Topological Materials 9: Theory |
| 2333 | From symmetry-based indicators to topological states in magnetic space groups | Peng, Bingrui; Jiang, Yi; Fang, Chen | Here we develop the complete theory of SI in all MSGs, which includes the explicit formulas of SIs, their physical meanings and quantitative mappings to topological invariants, and their correspondence to real-space constructions of magnetic topological states. | Session 172: Magnetic Topological Materials 9: Theory |
| 2334 | Towards a Theory of Surface Orbital Magnetization | Seleznev, Daniel; Vanderbilt, David | In this talk, we explore the possibility of defining a surface orbital magnetization on the boundary of a three-dimensional bulk system. | Session 172: Magnetic Topological Materials 9: Theory |
| 2335 | Inversion-Asymmetric Chiral Hinge States Due to the Inversion-Z4 Topology | Tanaka, Yutaro; Takahashi, Ryo; Zhang, Tiantian; Murakami, Shuichi | We study positions of chiral hinge states in higher-order topological insulators with inversion symmetry, and we find inversion-asymmetric hinge states, which are different from the conventional inversion-symmetric hinge states in the higher-order topological insulators. | Session 172: Magnetic Topological Materials 9: Theory |
| 2336 | Topological Invariant for Bosonic Bogoliubov-de Gennes Systems with Disorder | Akagi, Yutaka | In this study, we define a topological invariant corresponding to the conventional Chern number in disordered magnon Hall systems, using the method of non-commutative geometry. | Session 172: Magnetic Topological Materials 9: Theory |
| 2337 | Robust edge states in magnetic-texture based metamaterials | Yan, Peng | Through analytical and numerical calculations, we predict (higher-order) topological insulator states in magnetic-texture (e.g., skyrmion and vortex) based metamaterials, which manifests robust edge and/or corner states at device boundaries and is characterized by the quantized Chern number and the Z N Berry phase. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2338 | Fingerprints of Universal Spin-Stiffness Jump in Two-Dimensional Ferromagnets | Troncoso, Roberto | Here we demonstrate that the spatial correlations of injected spin-currents into a pair of metallic leads can be used to measure the predicted universal jump of 2/π in the ferromagnet spin-stiffness. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2339 | Van der Waals interactions in molecules and solids from quantum Monte Carlo | Heinonen, Olle; Shin, Hyeondeok; Benali, Anouar | Van der Waals interactions in molecules and solids from quantum Monte Carlo | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2340 | Unusual Friedel and RKKY responses in 3D quadratic band-touching Luttinger semimetals | J. Godbout, Louis; Tchoumakov, Serguei; Witczak-Krempa, William | We study the response of Luttinger semimetals, such as alpha-Sn, HgSe, HgTe, YPtBi and Pr 2Ir 2O 7, to charge and magnetic impurities. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2341 | Analogues of light and gravity in the collective excitations of quantum magnets | Chojnacki, Leilee; Pohle, Rico; Shannon, Nicholas | Through explicit simulation, we show how the quadrupole waves of a spin-1 magnet can mimic the gravitational radiation observed from binary mergers of black holes. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2342 | Detection of Kardar-Parisi-Zhang Hydrodynamics in a quantum Heisenberg spin-half chain | Sherman, Nicholas; Scheie, Allen; Dupont, Maxime; Nagler, Stephen; Stone, Matthew; Granroth, Garrett; Moore, Joel; Tennant, David | In this work, we study the dynamical structure factor using a tensor network approach, and show signatures of KPZ survive at finite temperatures. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2343 | First Principles Studies of Fe-intercalated $\mathrm{NbS_2}$ | Weber, Sophie; Neaton, Jeffrey | To shed light on these findings, we examine the magnetic properties and transport of $\mathrm{Fe_{1/3}NbS_2}$ using density functional theory calculations. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2344 | Domain wall displacement in multisegmented nanowires | Dolocan, Voicu | In this presentation, we show that using a multisegmented nanowire, the precise manipulation of transverse DWs can be achieved depending on the segments length and materials parameters. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2345 | A Superatomic Dimer with Massive Spin Magnetic and Internal Electric Dipole Moments | Bista, Dinesh; Sengupta, Turbasu; Reber, Arthur; Khanna, Shiv | In this work, the electronic and magnetic properties of the Fe 6S 8 cluster attached with ligands and the fused superatomic dimer are investigated using the first-principles density functional theory. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2346 | Quantum spin Hall effect in two-dimensional metals without spin-orbit coupling | Klemm, Richard; Zhao, Aiying; Gu, Qiang; Bullard, Thomas; Haugan, Timothy | We propose an experiment to measure the QSHE of an electron or hole in a two-dimensional (2D) metal without SOC. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2347 | Heterogeneous Chaos in Few-body Dynamics | Moharrami Allafi, Negin; Oganesyan, Vadim | We study the time-evolution of classical spin-dimer system and nature of the transition from non-chaotic into the chaotic region of phase space. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2348 | Magnetic oxygen in transition metal oxides: A case study of Ba2CoO4 | Hou, Lin | We find that the magnetic moment is not only localized on Co atoms, as assumed in all conventional data analysis, but also distributed on its tetrahedrally-coordinated O atoms, making CoO4 the magnetic building block instead of Co alone. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2349 | Exact solution of the linearized Boltzmann equation for the low-temperature resistivity in metallic ferromagnets. | Amarel, James; Belitz, Dietrich; Kirkpatrick, Theodore | We present a rigorous proof of Bloch’s T^5 law due to electron-phonon scattering [2] and give the corresponding result for scattering by magnons [3]; the prefactor of the exponential is asymptotically independent of the temperature. | Session 173: Magnetism Quantum Theory and Computation Studies |
| 2350 | Lanthanide Organometallic Compounds as Single-Molecule Magnets | Layfield, Richard | In this presentation, we will explore the relationship betweeen the dynamic magnetic properties of dysprosium sandwich compounds and their chemical environment. | Session 174: Single-Molecule Magnets and Qubits |
| 2351 | Vibronic coupling in candidate spin qubit material: Na9[Ho(W5O18)2]x35H2O | Blockmon, Avery; Ullah, Aman; Hughey, Kendall; Duan, Yan; ONeal, Ken; Ozerov, Mykhaylo; Arago, Juan; Gaita-Arino, Alejandro; Musfeldt, Janice | We compared our findings with complementary lattice dynamics calculations and models for spin-phonon and vibronic coupling. | Session 174: Single-Molecule Magnets and Qubits |
| 2352 | Investigating the Magnetic Properties of the Giant Mn84 Torus | Chen, Dian-Teng; Schurkus, Henry; O’Rourke, Matthew; Hale, Ashlyn; Christou, George; Chan, Garnet; Cheng, Hai-Ping | In this work, we investigate these interactions using first-principles calculations, from which a Heisenberg model is developed. | Session 174: Single-Molecule Magnets and Qubits |
| 2353 | Symmetries, pseudo-symmetries and single-molecule magnets | Mansikkamäki, Akseli | [1] In the present work we will show by quantitative evaluation of the crystal-field using ab initio methods that the symmetry of the crystal-field operator does not match that of an ideal pentagonal bipyramidal environment. | Session 174: Single-Molecule Magnets and Qubits |
| 2354 | Magnetic Properties of Single-Molecule Magnets Derived from Equation-of-Motion Coupled-Cluster Wave Functions | Alessio, Maristella; Krylov, Anna | This work presents validation studies for magnetic properties of transition metal complexes that are proposed as single-molecule magnets (SMMs). | Session 174: Single-Molecule Magnets and Qubits |
| 2355 | Relativistic Hyperfine Interaction in Single-Molecule Magnets: Multiconfigurational Study | Wysocki, Aleksander; Park, Kyungwha | Here, we describe an implementation of a first-principles computational methodology for magnetic hyperfine and electric quadrupole interactions within the framework of multiconfigurational quantum chemistry methods. | Session 174: Single-Molecule Magnets and Qubits |
| 2356 | Impact of Heisenberg Coupling Strength of Ferromagnetic Electrodes on Temporal and Spatial Properties of Magnetic Tunnel Junction based Molecular Spintronics Devices (MTJMSD) | Mutunga, Eva; Dahal, Bishnu; Savadkoohi, Marzieh; Grizzle, Andrew; D’Angelo, Christopher; Lamberti, Vincent; Tyagi, Pawan | We used Monte Carlo (MC) simulations based on the Ising model analog of MTJMSD to investigate the effect of ferromagnetic electrodes on magnetic and physical properties of the device. | Session 174: Single-Molecule Magnets and Qubits |
| 2357 | Towards the extraction and control of the Hamiltonian parameters of spin-3/2 Co(II) antiferromagnets. | Blackmore, William; Brambleby, Jamie; Singleton, John; Lees, Martin; Manson, Jamie; Goddard, Paul | We will present a methodology to characterise S = 3/2 Co 2+ antiferromagnets that make use of lab-based magnetometry and heat capacity techniques. | Session 174: Single-Molecule Magnets and Qubits |
| 2358 | Single-Molecule Magnet Mn12 on GaAs-supported Graphene: Gate Field Effects From First Principles | Liu, Shuanglong; Yazback, Maher; Fry, James; Zhang, Xiaoguang; Cheng, Hai-Ping | We study gate field effects on the Mn 12O 12(COOH) 16(H 2O) 4 | graphene | GaAs heterostructure via first-principles calculations. | Session 174: Single-Molecule Magnets and Qubits |
| 2359 | Evolution of exchange interactions in XXYY spin tetramers | Dyszel, Peter; Haraldsen, Jason | Using exact diagonalization, we examine the evolution of the quantum energy levels and thermodynamic properties for various spin configurations and exchange interactions. | Session 174: Single-Molecule Magnets and Qubits |
| 2360 | Electrically Tuned Hyperfine Coupling in Neutral Tb(II)-based Single-Molecule Magnet | Smith, Robert; Wysocki, Aleksander; Park, Kyungwha | Inspired by the solid-state systems, we propose that divalent lanthanide (Ln) complexes with unusual electronic configurations have a strong interaction between the Ln nuclear spin and the electronic degrees of freedom, which renders electrical tuning of the interaction. | Session 174: Single-Molecule Magnets and Qubits |