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We show that the conductivity tensor of a disordered two-dimensional electron gas becomes anisotropic in the presence of both Rashba and Dresselhaus spin-orbit interactions (SOI). This anisotropy is a mesoscopic effect and vanishes with…

介观与纳米尺度物理 · 物理学 2008-03-31 Oleg Chalaev , Daniel Loss

We consider the magnetic response of a two-dimensional electron gas (2DEG) with both Rashba and Dresselhaus spin-orbit coupling to a microwave excitation. We generalize the results of [A. Shnirman and I. Martin, Europhys. Lett. 78, 27001…

介观与纳米尺度物理 · 物理学 2009-01-22 Mikhail Pletyukhov , Alexander Shnirman

The band structure and magnetotransport of a two-dimensional electron gas (2DEG), in the presence of the Rashba (RSOI) and Dresselhaus (DSOI) terms of the spin-orbit interaction and of a perpendicular magnetic field, is investigated. Exact…

介观与纳米尺度物理 · 物理学 2009-11-11 X. F. Wang , P. Vasilopoulos

A nonperturbative interaction of an electronic system with a laser field can substantially modify its physical properties. In particular, in two-dimensional (2D) materials with a lack of inversion symmetry, the achievement of a regime of…

介观与纳米尺度物理 · 物理学 2016-10-20 Dmitry Yudin , Ivan A. Shelykh

We investigate the Rashba and Dresselhaus spin-orbit (SO) couplings in GaAs quantum wells in the range of well widths $w$ allowing for a transition of the electron occupancy from one to two subbands. By performing a detailed…

介观与纳米尺度物理 · 物理学 2015-02-06 J. Y. Fu , J. Carlos Egues

Strong Rashba spin-orbit coupling (SOC) of the two-dimensional electron gas (2DEG) at the oxide interface $\mathrm{LaAlO_{3}/SrTiO_{3}}$ underlies a variety of exotic physics, but its nature is still under debate. We derive an effective…

介观与纳米尺度物理 · 物理学 2015-06-10 Jianhui Zhou , Wen-Yu Shan , Di Xiao

The generation of spin current and spin polarization in 2DEG Rashba system is considered, in which the spin-orbital coupling (SOC) is modulated by an ac gate voltage. By using non-Abelian gauge field method, we show the presence of an…

介观与纳米尺度物理 · 物理学 2020-06-18 Cong Son Ho , Mansoor B. A. Jalil , Seng Ghee Tan

An influence of spin-orbit interaction on the tunneling between two 2D electron layers is considered. Particular attention is addressed to the relation between the contribution of Rashba and Dresselhaus types. It is shown that without…

其他凝聚态物理 · 物理学 2009-11-13 I. V. Rozhansky , N. S. Averkiev

We revise the Kubo formula for the electric dc conductivity in the presence of spin-orbit coupling (SOC). We discover that each velocity operator that enters this formula differs from $\partial H/\partial \boldsymbol p$, where $H$ is the…

介观与纳米尺度物理 · 物理学 2024-03-12 I. A. Ado , M. Titov , Rembert A. Duine , Arne Brataas

The coexistence of Rashba and Dresselhaus spin-orbit interactions (SOIs) in semiconductor quantum wells leads to an anisotropic effective field coupled to carriers' spins. We demonstrate a gate-controlled anisotropy in Aharonov-Casher (AC)…

介观与纳米尺度物理 · 物理学 2018-12-12 Fumiya Nagasawa , Andres A. Reynoso , José Pablo Baltanás , Diego Frustaglia , Henri Saarikoski , Junsaku Nitta

Aiming at the optimization of the spin diffusion length in (001) GaAs quantum wells, we explore the effect of the anisotropy of the spin-orbit coupling on the competition between the Rashba and the Dresselhaus spin-orbit couplings by…

材料科学 · 物理学 2007-05-23 J. L. Cheng , M. W. Wu , I. C. da Cunha Lima

We study effects of the oft-neglected cubic Dresselhaus spin-orbit coupling (i.e., $\propto p^3$) in GaAs/AlGaAs quantum dots. Using a semiclassical billiard model, we estimate the magnitude of the spin-orbit induced avoided crossings in a…

介观与纳米尺度物理 · 物理学 2009-11-13 Jacob J. Krich , Bertrand I. Halperin

The spin-galvanic effect and the circular photogalvanic effect induced by terahertz radiation are applied to determine the relative strengths of Rashba and Dresselhaus band spin-splitting in (001)-grown GaAs and InAs based two dimensional…

介观与纳米尺度物理 · 物理学 2009-11-11 S. Giglberger , L. E. Golub , V. V. Bel'kov , S. N. Danilov , D. Schuh , Ch. Gerl , F. Rohlfing , J. Stahl , W. Wegscheider , D. Weiss , W. Prettl , S. D. Ganichev

Spin Hall effect (SHE) has been discussed in the context of Kubo formulation, geometric physics, spin orbit force, and numerous semi-classical treatments. It can be confusing if the different pictures have partial or overlapping claims of…

介观与纳米尺度物理 · 物理学 2016-01-22 Seng Ghee Tan , Mansoor B. A. Jalil , Congson Ho , Zhuobin Siu , Shuichi Murakami

Shubnikov-de Haas (SdH) oscillations have served as a paradigmatic experimental probe and tool for extracting key semiconductor parameters such as carrier density, effective mass, Zeeman splitting with g-factor $g^*$, quantum scattering…

The interrelation between spin and charge in semiconductors leads to interesting effects, e.g., the Rashba-type spin-orbit splitting or the exchange enhancement. These properties are proposed to be used in applications such as spin…

介观与纳米尺度物理 · 物理学 2012-04-18 M. Morgenstern , A. Georgi , C. Straßer , C. R. Ast , S. Becker , M. Liebmann

Electron spins in a two-dimensional electron gas (2DEG) can be manipulated by spin-orbit (SO) fields originating from either Rashba or Dresselhaus interactions with independent isotropic characteristics. Together, though, they produce…

介观与纳米尺度物理 · 物理学 2018-03-26 Henri Saarikoski , Andrés Reynoso , José Pablo Baltanás , Diego Frustaglia , Junsaku Nitta

There is steadily increasing evidence that the two-dimensional electron gas (2DEG) formed at the interface of some insulating oxides like LaAlO3/SrTiO3 and LaTiO3/SrTiO3 is strongly inhomogeneous. The inhomogeneous distribution of electron…

介观与纳米尺度物理 · 物理学 2019-06-21 N. Bovenzi , S. Caprara , M. Grilli , R. Raimondi , N. Scopigno , G. Seibold

We calculate the linear and the second harmonic (SH) spin current response of two anisotropic systems with spin orbit (SO) interaction. The first system is a two-dimensional (2D) electron gas in the presence of Rashba and k-linear…

介观与纳米尺度物理 · 物理学 2023-09-19 D. Muñoz-Santana , Jesús A. Maytorena

When the Rashba and Dresslhaus spin-orbit coupling are both presented for a two-dimensional electron in a perpendicular magnetic field, a striking resemblance to anisotropic quantum Rabi model in quantum optics is found. We perform a…

量子气体 · 物理学 2021-07-13 Rui Zhang , Yuan-Chuan Biao , Wen-Long You , Xiao-Guang Wang , Yu-Yu Zhang