Article
Chemistry, Multidisciplinary
Cyrine Ernandes, Lama Khalil, Hugo Henck, Meng-Qiang Zhao, Julien Chaste, Fabrice Oehler, Alan T. Charlie Johnson, Maria C. Asensio, Debora Pierucci, Marco Pala, Jose Avila, Abdelkarim Ouerghi
Summary: Researchers investigated the band structure of WS2/graphene heterobilayer for various twist angles and found that strain quantitatively affects electronic features of WS2 monolayers, including the spin-orbit coupling strength. They demonstrated that the WS2 spin-orbit splitting can be tuned by strain, showing potential for controlling the band dispersion of van der Waals materials.
Article
Optics
Huan-Bo Luo, Boris A. Malomed, Wu-Ming Liu, Lu Li
Summary: A method is proposed to achieve controllable inversion of energy levels in a one-dimensional spin-orbit-coupled two-component Bose-Einstein condensate, allowing the transformation of any excited state into the ground state by adjusting the strength of the spin-orbit coupling and magnetic-field gradient.
Article
Materials Science, Multidisciplinary
I. A. Kokurin
Summary: Understanding the subband spectrum and wave functions of holes in III-V semiconductor nanowires is crucial for current applications. Previous studies have simplified the calculation of hole subbands, neglecting important features such as the real nanowire cross section shape and crystal orientation. In this study, these features are taken into account to calculate the subbands in GaAs nanowires. The results show that the lack of an inversion center significantly affects the subband spectrum and wave functions.
Article
Multidisciplinary Sciences
Philip Beck, Lucas Schneider, Levente Rozsa, Krisztian Palotas, Andras Laszloffy, Laszlo Szunyogh, Jens Wiebe, Roland Wiesendanger
Summary: The research revealed the splitting of atomic Shiba orbitals in antiferromagnetically coupled Mn dimers on a Nb(110) surface due to spin-orbit coupling and broken inversion symmetry, highlighting the significant influence of these previously unconsidered factors on the formation of Shiba bands in superconducting systems.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Prashant Singh
Summary: In this study, we analyzed the phase stability, bonding behavior, and electronic structure of lanthanide based heterostructure (EuxSm1-x)TaS3. The results showed a high solubility of Eu in (EuxSm1-x)TaS3 at 50 at.%, but instability beyond 50 at.%. We constructed a qualitative schematic of possible crystal field analysis based on the band position calculated from the spin-orbit coupling effect. The local changes in bond-length and bond-angle around Eu-S in (EuxSm1-x)TaS3 correlated well with our crystal-field analysis. We believe that the quantum mechanical insights provided in this work will be useful in understanding other complex heterostructures.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Karolina Gornicka, Xin Gui, Bartlomiej Wiendlocha, Loi T. Nguyen, Weiwei Xie, Robert J. Cava, Tomasz Klimczuk
Summary: The search for new superconducting materials remains a challenge, even though superconductivity was first observed over a century ago. The newly reported materials, NbIr(2)B(2) and TaIr2B2, display unique noncentrosymmetric crystal structures and unconventional superconductivity, as indicated by experimental and theoretical evidence. These materials may serve as an excellent platform for studying unconventional superconductivity in intermetallic compounds.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Hanyoung Ryu, Jae-Mo Lihm, Joonil Cha, Beomyoung Kim, Beom Seo Kim, Wonshik Kyung, Inkyung Song, Yeongkwan Kim, Garam Han, Jonathan Denlinger, In Chung, Cheol-Hwan Park, Seung Ryong Park, Changyoung Kim
Summary: By conducting angle-resolved photoemission studies on ferroelectric alpha-GeTe(111), it was observed that the Rashba splitting size of surface states is reduced upon potassium (K) doping, due to a decrease in surface potential energy barrier. This change in surface potential leads to delocalization of the surface states and reduction of the splitting size, suggesting the potential to increase the splitting size by doping other elements or molecules with high electron affinity.
Article
Physics, Multidisciplinary
H. Bai, L. Han, X. Y. Feng, Y. J. Zhou, R. X. Su, Q. Wang, L. Y. Liao, W. X. Zhu, X. Z. Chen, F. Pan, X. L. Fan, C. Song
Summary: This article provides experimental evidence of the spin splitting torque (SST) in collinear antiferromagnet RuO2 films, which combines the advantages of conventional spin transfer torque (STT) and spin-orbit torque (SOT) and enables controllable spin polarization. The findings not only expand the research field of spin torques but also propose the potential of RuO2 as a spin source.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Junxiao Zhou, Qianyi Wu, Junxiang Zhao, Clara Posner, Ming Lei, Guanghao Chen, Jin Zhang, Zhaowei Liu
Summary: FOSSM is a new quantitative phase imaging methodology that uses a metasurface located at the Fourier plane of a polarized microscope to separate the object image into two replicas of opposite circularly polarized states. The bias retardation between the two replicas is tuned by translating the metasurface or rotating the analyzer. Combined with a polarized camera, FOSSM enables single-shot quantitative phase gradient imaging, greatly simplifying the complexity of current phase microscope setups.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Xin-Jun Ma, Wei Zhang, Shuang Han, Cui-Lan Zhao, Zhao-Hua Ding, Yong Sun, Jing-Lin Xiao
Summary: This study investigates the polaron properties in semiconductor quantum dots influenced by the Rashba spin-orbit interaction. The relationships between the ground state energy, vibration frequency, confinement strength, interaction energy, and effective mass of the polaron are derived. Numerical calculations on RbCl and CsI crystals reveal that the Rashba interaction splits the ground state energy and effective mass of the polaron into two branches, which increase with the vibration frequency.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Multidisciplinary Sciences
Yuki Hibino, Tomohiro Taniguchi, Kay Yakushiji, Akio Fukushima, Hitoshi Kubota, Shinji Yuasa
Summary: The study elucidates a mechanism behind the enhancement of magnetic-dependent charge-to-spin conversion in ferromagnetic materials, highlighting the dominant role of interfacial contribution and the potential for control via interfacial band engineering. It shows that the efficiency of charge-to-spin conversion in ferromagnets surpasses other materials with reduced symmetry.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Ming-Hao Lv, Chang-Ming Li, Wei-Feng Sun
Summary: Phonon and spintronic structures of monolayered Janus vanadium-dichalcogenide compounds were calculated using first-principles schemes. The results showed that these compounds have dynamic structural stability and spin polarization, making them suitable for spintronics.
Article
Chemistry, Physical
Jianfeng Cai, Junxuan Yang, Guoqiang Liu, Liang Xu, Xuemei Wang, Haoyang Hu, Xiaojian Tan, Jun Jiang
Summary: This study reports the improved thermoelectric performance of PbSe through the novel spin-orbit coupling effect. By alloying with NaSbSe2, valence band convergence and bandgap enlargement are achieved in PbSe, resulting in a significantly increased Seebeck coefficient. Introduction of Cd doping to decrease the carrier concentration leads to a high peak ZT and remarkable average ZT in Pb0.8Na0.1Sb0.08Cd0.02Se. Among high ZT PbSe-based compounds, the sample exhibits the highest Seebeck coefficient and lowest thermal conductivity. This study provides insights into band structure tuning of Lead chalcogenides and promotes a new strategy for optimizing thermoelectric performance.
ADVANCED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Shiang Fang, Linda Ye, Madhav Prasad Ghimire, Mingu Kang, Junwei Liu, Minyong Han, Liang Fu, Manuel Richter, Jeroen van den Brink, Efthimios Kaxiras, Riccardo Comin, Joseph G. Checkelsky
Summary: In this study, we investigated the electronic structure of the ferromagnetic kagome metal Fe3Sn2 without spin-orbit coupling. We found two energetically split helical nodal lines near K and K' in the Brillouin zone, resulting from the trigonal stacking of the kagome layers. The hopping across A-A stacking introduced energy splitting, while that across A-B stacking controlled the momentum space amplitude of the helical nodal lines. Our findings have important implications for the design of topological materials.
Article
Engineering, Electrical & Electronic
Shabana Naz, Zahid Ali, Shahid Mehmood, Imad Khan, Iftikhar Ahmad
Summary: The research shows that spin-orbit coupling has a significant impact on the physical properties of perovskites A3SnO, affecting their electronic band structures, optical properties, and thermoelectric properties. These compounds have narrow direct band gaps, good mechanical properties, and optical activity in the infrared region. Thermal conductivity, heat capacity, Seebeck coefficient, Power factor, and Figure of merit indicate that these perovskites could be used in thermoelectric generators.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)