Article
Physics, Applied
Moh. Adhib Ulil Absor, Iman Santoso
Summary: The recent discovery of materials hosting persistent spin texture (PST) opens up new possibilities for energy-saving spintronics. However, the stability of PST is affected by symmetry breaking induced by external perturbations like electric fields. In this paper, the authors report the emergence of a stable PST in a two-dimensional ferroelectric bilayer WTe2, which can be effectively controlled by an out-of-plane external electric field. These findings offer a promising platform for highly efficient and non-volatile spintronic devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Optics
Lifu Zhang, Jie Jiang, Christian Multunas, Chen Ming, Zhizhong Chen, Yang Hu, Zonghuan Lu, Saloni Pendse, Ru Jia, Mani Chandra, Yi-Yang Sun, Toh-Ming Lu, Yuan Ping, Ravishankar Sundararaman, Jian Shi
Summary: Researchers demonstrate a persistent spin helix in an organic-inorganic hybrid ferroelectric halide perovskite. They show that the spin-polarized band structure can be switched via an intrinsic ferroelectric field. This discovery has the potential to resolve the control-relaxation dilemma in spintronic devices.
Article
Materials Science, Multidisciplinary
Shuai-Quan Yang, Mao-Wang Lu, Qing-Meng Guo, Ying-jie Qin, Shi-Shi Xie
Summary: In this study, we investigate the spin polarization of electrons in magnetically and electrically confined semiconductor microstructures. We found that the electron-spin polarization mainly comes from spin-orbit coupling due to the small effective g-factor for GaAs, and the magnitude and sign of spin polarization can be manipulated by adjusting the interfacial confining electric field or strain engineering, making it a tunable electron-spin filter for spintronics device applications.
RESULTS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Jinhui Shen, Zheng Feng, Pengchao Xu, Dazhi Hou, Yang Gao, Xiaofeng Jin
Summary: The study found that the charge voltages generated by two counterpropagating spin currents in the Ag/Bi interface show opposite signs, consistent with the inverse spin Hall effect rather than the inverse Rashba-Eldestein effect. Using femtosecond laser to generate spin-current-induced terahertz signal in the Ag/Bi bilayer also showed no evidence for the inverse Rashba-Eldestein effect. This work provides a clear-cut method to identify the spin-to-charge mechanism in a Rashba electronic state and delivers new understanding for the relevant spin-transport phenomena.
PHYSICAL REVIEW LETTERS
(2021)
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
Physics, Applied
Sudin Ganguly, Santanu K. Maiti
Summary: A new proposal for spin selective transmission is presented in this work, where spin-dependent transport is externally regulated by irradiating a quantum ring bridging contact electrodes. Precise dependencies of light irradiation, SO coupling, magnetic flux threaded by the ring, interface sensitivity, system temperature, and impurities on spin polarization are critically investigated, providing a potential platform for spin selective electron transmission and application to other complex nano-structured materials.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
R. Dilber Pushpitha, J. Thirumalai, L. Bruno Chandrasekar, K. Gnanasekar, R. Chandramohan
Summary: Tunneling of light hole (LH) and heavy hole (HH) in CdTe/Cd1-xMnxTe double-barrier heterostructure with Dresselhaus spin-orbit interaction is studied. It is found that the in-plane wave vector increases the polarization efficiency and enhances spin-separation, with dwell time also varying accordingly.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Multidisciplinary Sciences
Binoy K. Hazra, Banabir Pal, Jae-Chun Jeon, Robin R. Neumann, Boerge Goebel, Bharat Grover, Hakan Deniz, Andriy Styervoyedov, Holger Meyerheim, Ingrid Mertig, See-Hun Yang, Stuart S. P. Parkin
Summary: The generation of a robust spin current with both in-plane and out-of-plane spin polarization is demonstrated in epitaxial thin films of the chiral antiferromagnet Mn3Sn in proximity to permalloy thin layers. The in-plane polarized spin current is generated from the interior of Mn3Sn and follows its temperature dependence, while the out-of-plane polarized spin current arises from the spin swapping effect at the Mn3Sn/permalloy interface.
NATURE COMMUNICATIONS
(2023)
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
Nanoscience & Nanotechnology
Bahruz Suleymanli, Enver Nakhmedov, Farida Tatardar, Bilal Tanatar
Summary: We extend Berezinskii's diagram technique to study a one-dimensional disordered wire with Rashba and Dresselhaus spin-orbit interactions. By factorizing the retarded and advanced Green's functions in coordinate space, we transform the coordinate dependence of the functions to the impurity vertices. Our calculations show that the impurity vertices contributing to the correlators remain the same as in the conventional technique, except they are written in a 2 x 2 matrix form and the Fermi velocity now depends on the spin-orbit coupling constants. We use the diagrammatic method of Berezinskii with spin-orbit interaction to obtain the electron density distribution of the localized state p infinity(y).
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Physics, Multidisciplinary
Peng Shi, Xinrui Lei, Qiang Zhang, Heng Li, Luping Du, Xiaocong Yuan
Summary: Intrinsic spin-momentum locking is a fundamental property of surface electromagnetic fields, with important implications in various fields. Previous studies have ignored dispersion, leading to contradictions with physical reality. In this study, we present four dispersive spin-momentum equations that reveal the relationship between spin and momentum. Additionally, the locking behavior is influenced by structural features. By engineering rotational symmetry, the properties of spin-momentum locking can be identified in different photonic topological lattices.
PHYSICAL REVIEW LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Arnab Bose, Nathaniel J. Schreiber, Rakshit Jain, Ding-Fu Shao, Hari P. Nair, Jiaxin Sun, Xiyue S. Zhang, David A. Muller, Evgeny Y. Tsymbal, Darrell G. Schlom, Daniel C. Ralph
Summary: Symmetry plays a central role in determining the polarization of spin currents induced by electric fields. In this study, an out-of-plane damping-like torque is shown to be generated in RuO2/permalloy devices when the Neel vector of the collinear antiferromagnet RuO2 is canted relative to the sample plane. By measuring characteristic changes in the electric-field-induced torque vector, it is found that RuO2 generates a spin current with a well-defined tilted spin orientation parallel to the Neel vector. This antiferromagnetic spin Hall effect has distinct symmetries from other mechanisms of spin-current generation reported in antiferromagnetic and ferromagnetic materials.
NATURE ELECTRONICS
(2022)
Article
Multidisciplinary Sciences
Duhyuk Kwon, Yongsu Kwak, Doopyo Lee, Wonkeun Jo, Byeong-Gwan Cho, Tae-Yeong Koo, Jonghyun Song
Summary: Researchers synthesized a CaZrO3/SrTiO3 oxide heterostructure and confirmed the generation of a 2-dimensional electron gas at the heterointerface. They found that the electron gas exhibited a strong spin-orbit coupling, which may be crucial for the development of future metal oxide-based quantum nanoelectronics devices.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Yasha Gindikin, Vladimir A. Sablikov
Summary: This study reveals that the pair spin-orbit interaction (PSOI) created by the Coulomb fields of interacting electrons can give rise to an unconventional correlated electronic state in two-dimensional materials with a large Rashba effect. At sufficiently strong PSOI, this effect is indicated by a sharp peak in the structure factor, suggesting a tendency to form a striped structure with a spatial scale determined by the competition between Coulomb repulsion and PSOI-induced electron attraction. Beyond the critical value of PSOI, the system becomes unstable regarding charge density fluctuations on this scale.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Optics
B. S. Athira, Mandira Pal, Sounak Mukherjee, Niladri Modak, Sudipta Saha, Ankit Kumar Singh, Subhasish Dutta Gupta, Dibyendu Nandy, Nirmalya Ghosh
Summary: Spin-orbit interaction involves the interaction and coupling of spin and orbital angular momentum of spinning particles, leading to non-trivial optical phenomena and opening up a new field of spin-orbit photonics.