Article
Materials Science, Multidisciplinary
Maryam Sabzevar, Mohammad Hossien Ehsani, Mehdi Solaimani
Summary: The study investigates the time evolution of a Gaussian wave packet in a one-dimensional semiconductor with multiple potential barriers in order to determine the spin-based transmission, reflection, and trapping coefficients. The split-step finite difference method is utilized to solve the resulting nonlinear coupled Schrodinger equations. The scattering properties of the system are analyzed in relation to the Rashba and Dresselhaus spin-orbit interactions, wave-packet velocity, barrier geometry, and number of neighboring barriers. The results demonstrate that by adjusting the Rashba and Dresselhaus coupling strengths and system characteristics, control over the spin polarization and propagation coefficients of the wave packet can be achieved.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Physics, Applied
Hui Zhang, Zengtai Zhu, Yungu Zhu, Xiaobing Chen, Qisheng Jiang, Jinwu Wei, Chenbo Zhao, Jine Zhang, Furong Han, Huaiwen Yang, Dapeng Zhu, Hao Wu, Yuansha Chen, Fengxia Hu, Baogen Shen, Weisheng Zhao, Jing Zhang, Guoqiang Yu, Jirong Sun
Summary: This study investigates metallic 2DEGs in gamma-Al2O3/KTaO3 heterostructures and explores the impact of Fermi level on charge-to-spin conversion. The results show that optimizing the Fermi level can greatly enhance the conversion efficiency.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Liang-Liang Wang, Wenjun Shao, Qing Sun, Jian Li
Summary: We investigate a fermionic superfluid with Raman-induced spin-orbit coupling immersed in a Bose-Einstein condensate. By minimizing the total free energy, we find that, with moderate repulsive interspecies interaction, a phase separation occurs where the otherwise nontopological uniform phase is divided into two parts: a purely fermionic one and a Bose-Fermi mix characterized by nontrivial topology with the winding number W = 1. We verify that Majorana zero modes emerge at the phase interfaces by numerical simulations of the coupled Bogoliubov-de Gennes and Gross-Pitaevskii equations in real space. The tunability of the phase interfaces enables a direct manipulation of the predicted Majorana zero modes.
Article
Physics, Applied
Makoto Kohda, Takeshi Seki, Yasushi Yuminaka, Tetsuya Uemura, Keito Kikuchi, Gian Salis
Summary: This article discusses the differences between waves and particle properties, as well as their applications in data processing and storage. It introduces the information theory of wave-parallel computing and the fundamental properties needed for wave-based information carriers. The potential of electron spin waves and magnons as information carriers for processing and storage is examined. The interconversion among light helicity, electron spin waves, and magnons is also discussed.
APPLIED PHYSICS LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Seung Gyo Jeong, Jin Young Oh, Lin Hao, Jian Liu, Woo Seok Choi
Summary: Unexpected and useful functionalities arise when different materials merge coherently. This review focuses on artificial oxide superlattices, specifically 4d and 5d perovskite oxide superlattices, which exhibit controllable correlated quantum phenomena due to their unique atomic and crystal structures. The review discusses various modulations and controls in crystal structures, electronic and magnetic properties, and integration of topology and correlation in these superlattices. It provides insights into the deliberate design of superlattice structures to achieve novel functionalities.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Ruwan Senaratne, Danyel Cavazos-Cavazos, Sheng Wang, Feng He, Ya-Ting Chang, Aashish Kafle, Han Pu, Xi-Wen Guan, Randall G. Hulet
Summary: Confining ultracold atoms to periodic potentials is a powerful method for simulating complex many-body systems. In this study, we confined fermions to one dimension to realize the Tomonaga-Luttinger liquid model and observed a velocity shift of spin and charge excitations in opposite directions, indicating the existence of spin-charge separation.
Article
Optics
Zheng Gao, Lianyi He, Huaisong Zhao, Shi-Guo Peng, Peng Zou
Summary: We calculate the density dynamic structure factor of one-dimensional Fermi superfluid with Raman-type spin-orbit coupling and analyze its main dynamical characteristics during the phase transition between Bardeen-Cooper-Schrieffer superfluid and topological superfluid. Our results show four types of single-particle excitations induced by the two-branch structure of the single-particle spectrum, and the cross single-particle excitation is more easily observed in the spin dynamic structure factor at a small transferred momentum. Additionally, we observe a new rotonlike collective mode at a fixed transferred momentum q similar to 2(k)F, which only appears in the topological superfluid state.
Article
Optics
M. Iskin
Summary: The study focuses on how spin-orbit coupling affects fermion-dimer and dimer-dimer scattering lengths using the Born approximation, comparing their accuracy with higher-order approximations. It is found that in certain limits, the Born approximation provides accurate results due to the control by the smallness of the residue Z of the dimer propagator. In contrast, in a different region, all higher-loop contributions are of similar order due to the growth of Z with the square root of the binding energy of the dimer.
Review
Optics
Tong Cui, Lin Sun, Benfeng Bai, Hong-Bo Sun
Summary: Photonic spin-orbit interactions in nanostructures have attracted significant interest in nanophotonics, offering new opportunities for enhancing light-matter interactions at the nanoscale. Various phenomena such as the photonic spin-Hall effect and spin-vortex conversion have been demonstrated, highlighting the potential of PSOIs in shaping light wavefronts. The review systematically covers experimental observations and detections of PSOIs, discussing the advantages, challenges, and future perspectives in probing these interactions.
LASER & PHOTONICS REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Vivek Kumar, Nirmal Ganguli
Summary: This study comprehensively analyzes the Rashba-like spin-orbit interaction in KTaO3 using first-principles calculations and finds no evidence of Dresselhaus or higher order Rashba interactions. It provides crucial insights for future developments in oxide spintronics.
Article
Physics, Multidisciplinary
Hong-Hao Yin, Tian-Yang Xie, An-Chun Ji, Qing Sun
Summary: We investigated the polaron and molecular states of a fermionic atom with spin-orbit coupling coupled to a Fermi sea. The energy dispersion of the polaron generally has a double-minimum structure and a discontinuous transition between polarons with different momenta may occur. The Raman coupling and effective Zeeman field strongly affect the molecular state and polaron-to-molecule transition.
Article
Chemistry, Multidisciplinary
Alexey Neilo, Sergey Bakurskiy, Nikolay Klenov, Igor Soloviev, Mikhail Kupriyanov
Summary: The proximity effect in SNSOF and SF'F structures with spin-orbit interaction in the normal layer was theoretically investigated. It was found that the triplet correlations generated in the ferromagnetic layer can be effectively suppressed by a normal layer with spin-orbit interaction. The critical temperature of the superconducting layer in the SNSOF multilayer was higher compared to a similar multilayer without spin-orbit interaction in the normal layer. Additionally, a SNSOF structure with a mixed type of spin-orbit interaction was identified as a spin valve, with its critical temperature determined by the direction of the magnetization vector in the ferromagnetic layer. The control characteristics of the SNSOF spin valve were calculated and compared with traditional SF'F devices with two ferromagnetic layers. It was concluded that SNSOF structures with one controlled ferromagnetic layer have advantages over widely considered SF'F spin valves, making them promising for high-performance storage components in superconducting electronics.
Article
Physics, Multidisciplinary
Genwang Fan, Xiao-Long Chen, Peng Zou
Summary: In this theoretical study, we investigate the Higgs oscillation in a one-dimensional Raman-type spin-orbit-coupled Fermi superfluid using the time-dependent Bogoliubov-de Gennes equations. By linearly ramping or abruptly changing the effective Zeeman field in both the Bardeen-Cooper-Schrieffer state and the topological superfluid state, we find that the amplitude of the order parameter exhibits an oscillating behavior over time with two different frequencies. We further verify the existence of these two Higgs oscillations using a periodic ramp strategy with theoretically calculated driving frequency. Our predictions would be useful for further theoretical and experimental studies of these Higgs oscillations in spin-orbit-coupled systems.
FRONTIERS OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Axel Hoffmann
Summary: Spintronics is a rapidly developing research field that involves complex concepts such as spin-orbit interactions, magnetic materials, and spin currents. This article presents several examples to illustrate the complexities that can be encountered in these systems and highlights the contributions of Chia-Ling Chien and his research group in the forefront of spintronics research.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Taiki Kawamura, Akito Kobayashi
Summary: Motivated by recent nuclear magnetic resonance experiments, the authors investigate the spin susceptibility and other properties of the molecular conductor [Ni(dmdt)2]. They find that the properties are influenced by the molecular orbitals and wave numbers, and show different responses at different temperatures.
