keyword
https://read.qxmd.com/read/38063426/bipolar-rashba-semiconductors-a-class-of-nonmagnetic-materials-for-electrical-spin-manipulation
#21
JOURNAL ARTICLE
Xiaomin Fu, Chao Jia, Li Sheng, Qunxiang Li, Jinlong Yang, Xingxing Li
The realization of the electrical control of spin is highly desirable. One promising approach is by regulating the Rashba spin-orbit coupling effect of materials through external electric fields. However, this method requires materials to possess either a high electric field response and a large Rashba constant or the simultaneous presence of Rashba splitting and ferroelectric polarization. These stringent requirements result in a scarcity of suitable materials. In order to surpass these limitations and exploit a new prospect for spin manipulation via the Rashba effect, a conceptual class of materials named bipolar Rashba semiconductors (BRS) is proposed, whose valence band and conduction band possess opposite spin texture directions when approaching the Fermi level...
December 8, 2023: Journal of Physical Chemistry Letters
https://read.qxmd.com/read/38061071/spin-and-charge-persistent-currents-in-a-kane-mele-%C3%AE-t3-quantum-ring
#22
JOURNAL ARTICLE
Mijanur Islam, Saurabh Basu
We conduct a thorough study of different persistent currents in a spin-orbit coupled α-T3 (pseudospin-1) fermionic quantum ring (QR) that smoothly interpolates between graphene (α = 0, pseudospin-1/2) and a dice lattice (α = 1, pseudospin-1) in presence of an external perpendicular magnetic field. In particular, we have considered effects of intrinsic (ISOC) and Rashba spin-orbit couplings (RSOC) that are both inherent to two dimensional quantum structures and yield interesting consequences...
December 7, 2023: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://read.qxmd.com/read/38053401/biaxial-strain-modulated-electronic-structures-of-layered-two-dimensional-mosigen-4-rashba-systems
#23
JOURNAL ARTICLE
Puxuan Li, Xuan Wang, Haoyu Wang, Qikun Tian, Jinyuan Xu, Linfeng Yu, Guangzhao Qin, Zhenzhen Qin
The two-dimensional (2D) MA2 Z4 family has received extensive attention in manipulating its electronic structure and achieving intriguing physical properties. However, engineering the electronic properties remains a challenge. Herein, based on first-principles calculations, we systematically investigate the effect of biaxial strains on the electronic structure of 2D Rashba MoSiGeN4 (MSGN), and further explore how the interlayer interactions affect the Rashba spin splitting (RSS) in such strained layered MSGN systems...
December 6, 2023: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/38019659/current-induced-magnetization-switching-in-light-metal-oxide-ferromagnetic-metal-bilayers-via-orbital-rashba-effect
#24
JOURNAL ARTICLE
QiKun Huang, Senmiao Liu, Tianxiang Yang, Ronghuan Xie, Li Cai, Qiang Cao, Weiming Lü, Lihui Bai, Yufeng Tian, Shishen Yan
The orbital angular momentum (OAM) generation as well as its associated orbital torque is currently a matter of great interest in spin-orbitronics and is receiving increasing attention. In particular, recent theoretical work predicts that the oxidized light metal Cu can serve as an efficient OAM generator through its surface orbital Rashba effect. Here, for the first time, the crucial current-induced magnetic-field-free in-plane magnetization reversal is experimentally demonstrated in CoFeB/CuO x bilayers without any heavy elements...
November 29, 2023: Nano Letters
https://read.qxmd.com/read/38009949/synthesis-and-optical-properties-of-one-year-air-stable-chiral-sb-iii-halide-semiconductors
#25
JOURNAL ARTICLE
Ali Azmy, Daria M Konovalova, Leah Lepore, Alexander Fyffe, Doyun Kim, Lukasz Wojtas, Qing Tu, Minh Tuan Trinh, Nourdine Zibouche, Ioannis Spanopoulos
Chiral hybrid metal-halide semiconductors (MHS) pose as ideal candidates for spintronic applications owing to their strong spin-orbit coupling (SOC), and long spin relaxation times. Shedding light on the underlying structure-property relationships is of paramount importance for the targeted synthesis of materials with an optimum performance. Herein, we report the synthesis and optical properties of 1D chiral ( R -/ S -THBTD)SbBr5 (THBTD = 4,5,6,7-tetrahydro-benzothiazole-2,6-diamine) semiconductors using a multifunctional ligand as a countercation and a structure directing agent...
November 27, 2023: Inorganic Chemistry
https://read.qxmd.com/read/37988035/manipulation-of-spin-orbit-torque-in-tungsten-oxide-manganite-heterostructure-by-ionic-liquid-gating-and-orbit-engineering
#26
JOURNAL ARTICLE
Weikang Liu, Liang Liu, Bin Cui, Shaobo Cheng, Xinyi Wu, Bin Cheng, Tingting Miao, Xue Ren, Ruiyue Chu, Min Liu, Xiangxiang Zhao, Shuyun Wu, Hongwei Qin, Jifan Hu
Spin-orbit coupling (SOC) is the interaction between electron's spin and orbital motion, which could realize a charge-to-spin current conversion and enable an innovative method to switch the magnetization by spin-orbit torque (SOT). Varied techniques have been developed to manipulate and improve the SOT, but the role of the orbit degree of freedom, which should have a crucial bearing on the SOC and SOT, is still confusing. Here, we find that the charge-to-spin current conversion and SOT in W3 O8-δ /(La, Sr)MnO3 could be produced or eliminated by ionic liquid gating...
December 12, 2023: ACS Nano
https://read.qxmd.com/read/37976545/spin-charge-interconversion-of-two-dimensional-electron-gases-at-oxide-interfaces
#27
JOURNAL ARTICLE
Dongyao Zheng, Hui Zhang, Feng-Xia Hu, Baogen Shen, Jirong Sun, Weisheng Zhao
Oxide two-dimensional electron gas (2DEG) is a low-dimensional carrier system formed at the interface of oxide heterojunctions with strong and tunable Rashba spin-orbit coupling (SOC) which makes oxide 2DEG an ideal platform for converting spin current and charge current. This review provides a summary of the recent advances on the 2DEGs at oxide interfaces for spin-charge interconversion. On one hand, we analyze novel properties and the efficiency of the spin-to-charge conversion through different ways of spin current injection...
November 17, 2023: Nanotechnology
https://read.qxmd.com/read/37973986/phase-biasing-of-a-josephson-junction-using-rashba-edelstein-effect
#28
JOURNAL ARTICLE
Tapas Senapati, Ashwin Kumar Karnad, Kartik Senapati
A charge-current-induced shift in the spin-locked Fermi surface leads to a non-equilibrium spin density at a Rashba interface, commonly known as the Rashba-Edelstein effect. Since this is an intrinsically interfacial property, direct detection of the spin moment is difficult. Here we demonstrate that a planar Josephson Junction, realized by placing two closely spaced superconducting electrodes over a Rashba interface, allows for a direct detection of the spin moment as an additional phase in the junction. Asymmetric Fraunhofer patterns obtained for Nb-(Pt/Cu)-Nb nano-junctions, due to the locking of Rashba-Edelstein spin moment to the flux quantum in the junction, provide clear signatures of this effect...
November 16, 2023: Nature Communications
https://read.qxmd.com/read/37955470/emergence-of-a-spin-microemulsion-in-spin-orbit-coupled-bose-einstein-condensates
#29
JOURNAL ARTICLE
Ethan C McGarrigle, Kris T Delaney, Leon Balents, Glenn H Fredrickson
We report the first numerical prediction of a "spin microemulsion"-a phase with undulating spin domains resembling classical bicontinuous oil-water-surfactant emulsions-in two-dimensional systems of spinor Bose-Einstein condensates with isotropic Rashba spin-orbit coupling. Using field-theoretic numerical simulations, we investigated the melting of a low-temperature stripe phase with supersolid character and find that the stripes lose their superfluidity at elevated temperature and undergo a Kosterlitz-Thouless-like transition into a spin microemulsion...
October 27, 2023: Physical Review Letters
https://read.qxmd.com/read/37934455/tuning-rashba-dresselhaus-effect-with-ferroelectric-polarization-at-asymmetric-heterostructural-interface
#30
JOURNAL ARTICLE
Bangmin Zhang, Chunhua Tang, Ping Yang, Jingsheng Chen
The spin-orbit interaction (SOI) plays an essential role in materials properties, and controlling its intensity has great potential in the design of materials. In this work, asymmetric [(La0.7 Sr0.3 MnO3 )8 /(BaTiO3 )t /(SrTiO3 )2 ]8 superlattices were fabricated on (001) SrTiO3 substrate with SrO or TiO2 termination, labelled as SrO-SL and TiO2 -SL, respectively. The in-plane angular magnetoresistance of the superlattices shows a combination of two- and four-fold symmetry components. The coefficient of two-fold symmetry component has opposite sign with current I along [100] and [110] directions for TiO2 -SL, while it has the same sign for SrO-SL...
November 7, 2023: Materials Horizons
https://read.qxmd.com/read/37920992/rashba-effect-a-chemical-physicist-s-approach
#31
REVIEW
Maciej J Szary
Understanding the mechanisms underlying the emergence of giant spin splitting (GSS) is fundamental in the pursuit of more robust strategies for designing materials with desired spin splitting. This drive for material innovation continues to captivate a burgeoning community of early-career researchers with backgrounds in chemistry and material science. However, new to the field, they are often equipped only with the insight provided by the original Bychkov-Rashba model. Furthermore, daunted by the tight-binding perspective on the non-vanishing orbital angular momentum (OAM), they struggle to accurately account for the atomic spin-orbit interaction (SOI) in the formation of GSS...
November 3, 2023: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/37903762/large-interlayer-dzyaloshinskii-moriya-interactions-across-ag-layers
#32
JOURNAL ARTICLE
Jon Ander Arregi, Patricia Riego, Andreas Berger, Elena Y Vedmedenko
Seeking to enhance the strength of the interlayer Dzyaloshinskii-Moriya interaction (IL-DMI) through a combination of atomic and Rashba type spin-orbit coupling (SOC) we studied the strength and the thickness evolution of effective interlayer coupling in Co/Ag/Co trilayers by means of surface sensitive magneto-optical measurements that take advantage of the light penetration depth. Here, we report the observation of oscillatory, thickness-dependent chiral interaction between ferromagnetic layers. Despite the weakness of the Ag atomic SOC, the IL-DMI in our trilayers is orders of magnitude larger than that of known systems using heavy metals as a spacer except of recently reported -0...
October 30, 2023: Nature Communications
https://read.qxmd.com/read/37863891/spin-polarized-majorana-zero-modes-in-proximitized-superconducting-penta-silicene-nanoribbons
#33
JOURNAL ARTICLE
R C Bento Ribeiro, J H Correa, L S Ricco, I A Shelykh, Mucio A Continentino, A C Seridonio, M Minissale, G Le Lay, M S Figueira
We theoretically propose penta-silicene nanoribbons (p-SiNRs) with induced p-wave superconductivity as a platform for the emergence of spin-polarized Majorana zero-modes (MZMs). The model explicitly considers the key ingredients of well-known Majorana hybrid nanowire setups: Rashba spin-orbit coupling, magnetic field perpendicular to the nanoribbon plane, and first nearest neighbor hopping with p-wave superconducting pairing. The energy spectrum of the system, as a function of chemical potential, reveals the existence of MZMs with a well-defined spin orientation localized at the opposite ends of both the top and bottom chains of the p-SiNR, associated with well-localized and nonoverlapping wave function profiles...
October 20, 2023: Scientific Reports
https://read.qxmd.com/read/37850507/the-tunable-anisotropic-rashba-spin-orbit-coupling-effect-in-pb-adsorbed-janus-monolayer-wsete
#34
JOURNAL ARTICLE
Can Yang, Jia Li, Xiaoli Liu, Congling Bai
The spin-splitting properties of Pb-adsorbed monolayer Janus WSeTe are investigated based on first-principles calculations. The adsorbed system shows large Rashba splitting (the Rashba parameter is up to 0.75 eV Å), and we find that different adsorption layers (Te/Se adsorption layers) exhibit different significant features under spin-orbit coupling. Zeeman splitting and Rashba splitting co-exist at the high symmetry Γ point of the Te adsorption layer, while the Se adsorption layer exhibits anisotropic Rashba spin-orbit coupling...
October 18, 2023: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/37777513/ballistic-transport-spectroscopy-of-spin-orbit-coupled-bands-in-monolayer-graphene-on-wse-2
#35
JOURNAL ARTICLE
Qing Rao, Wun-Hao Kang, Hongxia Xue, Ziqing Ye, Xuemeng Feng, Kenji Watanabe, Takashi Taniguchi, Ning Wang, Ming-Hao Liu, Dong-Keun Ki
Van der Waals interactions with transition metal dichalcogenides were shown to induce strong spin-orbit coupling (SOC) in graphene, offering great promises to combine large experimental flexibility of graphene with unique tuning capabilities of the SOC. Here, we probe SOC-driven band splitting and electron dynamics in graphene on WSe2 by measuring ballistic transverse magnetic focusing. We found a clear splitting in the first focusing peak whose evolution in charge density and magnetic field is well reproduced by calculations using the SOC strength of ~ 13 meV, and no splitting in the second peak that indicates stronger Rashba SOC...
September 30, 2023: Nature Communications
https://read.qxmd.com/read/37749298/large-band-gap-non-dirac-quantum-spin-hall-states-and-strong-rashba-effect-in-functionalized-thallene-films
#36
JOURNAL ARTICLE
Xiaojuan Liu, Zhijian Li, Hairui Bao, Zhongqin Yang
The quantum spin Hall state materials have recently attracted much attention owing to their potential applications in the design of spintronic devices. Based on density functional theory calculations and crystal field theory, we study electronic structures and topological properties of functionalized thallene films. Two different hydrogenation styles (Tl2 H and Tl2 H2 ) are considered, which can drastically vary the electronic and topological behaviors of the thallene. Due to the C3v symmetry of the two systems, the px and py orbitals at the Γ point have the non-Dirac band degeneracy...
September 25, 2023: Scientific Reports
https://read.qxmd.com/read/37741927/strong-rashba-parameter-of-two-dimensional-electron-gas-at-cazro-3-srtio-3-heterointerface
#37
JOURNAL ARTICLE
Duhyuk Kwon, Yongsu Kwak, Doopyo Lee, Wonkeun Jo, Byeong-Gwan Cho, Tae-Yeong Koo, Jonghyun Song
We synthesized a CaZrO3 /SrTiO3 oxide heterostructure, which can serve as an alternative to LaAlO3 /SrTiO3 , and confirmed the generation of 2-dimensional electron gas (2-DEG) at the heterointerface. We analyzed the electrical-transport properties of the 2-DEG to elucidate its intrinsic characteristics. Based on the magnetic field dependence of resistance at 2 K, which exhibited Weak Anti-localization (WAL) behaviors, the fitted Rashba parameter values were found to be about 12-15 × 10-12  eV*m...
September 23, 2023: Scientific Reports
https://read.qxmd.com/read/37740355/spin-polarization-in-quantum-point-contact-based-on-wurtzite-topological-quantum-well
#38
JOURNAL ARTICLE
Xin Xue, Fobao Huang, Gongwei Hu
Manipulating spin polarization in wide-gap wurtzite semiconductors is crucial for the development of high-temperature spintronics applications. A topological insulator revealed recently in wurtzite quantum wells (QWs) provides a platform to mediate spin-polarized transport through the polarization field-driven topological edges and large Rashba spin-orbit coupling (SOC). Here, we propose a spin-polarized device in a quantum point contact (QPC) structure based on ZnO/CdO wurtzite topological QWs. The results show that the QPC width can sufficiently control the lateral spin-orbit coupling (SOC) as well as the band gap of the edge states through the quantum size effect...
September 22, 2023: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/37733252/enhanced-rashba-spin-orbit-coupling-and-magnetic-behavior-at-oxide-heterointerfaces-by-optical-gating
#39
JOURNAL ARTICLE
Hang Yin, Shuanhu Wang, Kexin Jin
Complex oxide heterointerfaces have been a hot research spot due to their rich physical phenomena and broad quantum coherence that respond to multiple external stimuli. Among these external stimuli, light is a very powerful one to manipulate properties such as carrier density and spin characteristics. However, achieving a light-magnetic correlation is in high demand for multifield responding devices, and its intrinsic mechanism remains unclear. Here, by illuminating Nd0.86 Sr0.14 Al0.86 Ni0.14 O3 -SrTiO3 heterointerfaces using 360 nm light, we observe a series of interesting physical phenomena, like enhanced magnetoresistance ( MR )...
September 21, 2023: Journal of Physical Chemistry Letters
https://read.qxmd.com/read/37726010/a-closer-look-at-how-symmetry-constraints-and-the-spin-orbit-coupling-shape-the-electronic-structure-of-bi-111
#40
JOURNAL ARTICLE
Marisol Alcàntara Ortigoza, Talat Shanaz Rahman
Fully relativistic density-functional-theory calculations of Bi(111) thin films are analyzed to
revisit their two metallic surface-states branches. We first contrast these metallic branches with surface states arising at gaps in the valence band opened by the spin-orbit coupling (SOC).
We find that the two metallic branches along ΓM do not overlap with the bulk band at the zone
boundary, M. We show that the spin texture observed in such states cannot be traced to the lifting
of Kramers' degeneracy...
September 19, 2023: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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