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The relative strengths of Rashba and Dresselhaus terms describing the spin-orbit coupling in semiconductor quantum well (QW) structures are extracted from photocurrent measurements on n-type InAs QWs containing a two-dimensional electron…

We theoretically propose a novel spin-dependent electronic transport mechanism in which the spin-unpolarized electron beam is split into different directions depending on spins at an atomic domain boundary in non-magnetic material.…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 Tetsuro Habe , Mikito Koshino

Polar distortions in solids give rise to the well-known functionality of switchable macroscopic polarisation in ferroelectrics and, when combined with strong spin-orbit coupling, can mediate giant spin splittings of electronic states. While…

The spin-orbit interaction of two-dimensional (2D) electrons in semiconductor quantum wells is usually considered to be determined by the band profile of a heterostructure. In the GaAs/AlGaAs type heterosystems, this interaction consists of…

Mesoscale and Nanoscale Physics · Physics 2021-05-19 P. S. Alekseev , M. O. Nestoklon

Noncollinear dipole textures greatly extend the scientific merits and application perspective of ferroic materials. In fact, noncollinear spin textures have been well recognized as one of the core issues of condensed matter, e.g.…

Materials Science · Physics 2024-12-06 Na Wang , Zhong Shen , Wang Luo , Hua-Kai Li , Ze-Jiang Xu , Chao Shi , Heng-Yun Ye , Shuai Dong , Le-Ping Miao

The Rashba effect, i.e., the splitting of electronic spin-polarized bands in the momentum space of a crystal with broken inversion symmetry, has enabled the realization of spin-orbitronic devices, in which spins are manipulated by…

We investigate theoretically how the spin-orbit Dresselhaus and Rashba effects influence the electronic structure of quasi-one-dimensional semiconductor quantum dots, similar to those that can be formed inside semiconductor nanorods. We…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 C. L. Romano , S. E. Ulloa , P. I. Tamborenea

One of the most fundamental phenomena and a reminder of the electron's relativistic nature is the Rashba spin splitting for broken inversion symmetry. Usually this splitting is a tiny relativistic correction, hardly discernible in…

Materials Science · Physics 2015-02-23 Zhicheng Zhong , Liang Si , Qinfang Zhang , Wei-Guo Yin , Seiji Yunoki , Karsten Held

The new two-dimensional materials, MoSi$_2$N$_4$ and WSi$_2$N$_4$ are experimentally synthesized successfully and various similar structures are predicted theoretically. Here, we report the electronic properties with a special focus on the…

Materials Science · Physics 2023-03-01 Sajjan Sheoran , Deepika Gill , Ankita Phutela , Saswata Bhattacharya

Spin relaxation of two-dimensional electrons in asymmetrical (001) AlGaAs quantum wells are measured by means of Hanle effect. Three different spin relaxation times for spins oriented along [110], [1-10] and [001] crystallographic…

Mesoscale and Nanoscale Physics · Physics 2015-06-25 N. S. Averkiev , L. E. Golub , A. S. Gurevich , V. P. Evtikhiev , V. P. Kochereshko , A. V. Platonov , A. S. Shkolnik , Yu. P. Efimov

We report unprecedented evidence of a spin split one-dimensional metallic surface state for the system of Si(557)-Au obtained by means of high-resolution spin- and angle-resolved photoelectron spectroscopy combined with first principles…

Here, we report a novel AuSb 2D superstructure on Au(111) that shows agreements and discrepancies to the expected electronic features of the ideal 2D surface alloys with $\sqrt{3}\times\sqrt{3}$ periodicity. Using spin- and angle-resolved…

Materials Science · Physics 2024-10-07 Jinbang Hu , Xiansi Wang , Anna Cecilie Åsland , Justin Wells

In a semiconductor, collective excitations of spin textures usually decay rather fast due to D'yakonov-Perel' spin relaxation. The latter arises from spin-orbit coupling, which induces wave-vector-dependent spin rotations that, in…

Mesoscale and Nanoscale Physics · Physics 2020-07-01 Daisuke Iizasa , Makoto Kohda , Ulrich Zülicke , Junsaku Nitta , Michael Kammermeier

Skyrmions are topological spin textures of interest for fundamental science and applications. Previous theoretical studies have focused on systems with broken bulk inversion symmetry, where skyrmions are stabilized by easy-axis anisotropy.…

Strongly Correlated Electrons · Physics 2016-02-16 James Rowland , Sumilan Banerjee , Mohit Randeria

The time evolution of a local spin excitation in a (001)-confined two-dimensional electron gas subjected to Rashba and Dresselhaus spin-orbit interactions of similar strength is investigated theoretically and compared with experimental…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 G. Salis , M. P. Walser , P. Altmann , C. Reichl , W. Wegscheider

In this work, we show that a gate electric field, applied in the base of the field-effect devices, leads to inducing spin-orbit interactions (Rashba and linear Dresselhauss) and confines the transport electrons in a two-dimensional electron…

Mesoscale and Nanoscale Physics · Physics 2012-07-03 J. L. Cardoso , H. Hernández-Saldaña

We study the effect of the interplay between the Rashba and the Dresselhaus spin-orbit couplings on the transverse electron focusing in two-dimensional electron gases. Depending on their relative magnitude, the presence of both couplings…

Mesoscale and Nanoscale Physics · Physics 2008-09-19 A. A. Reynoso , Gonzalo Usaj , C. A. Balseiro

The dependence of spin relaxation on the direction of the quantum wire under Rashba and Dresselhaus (linear and cubic) spin orbit coupling is studied. Comprising the dimensional reduction of the wire in the diffusive regime, the lowest spin…

Disordered Systems and Neural Networks · Physics 2012-03-13 Paul Wenk , Stefan Kettemann

Theory of Rashba spin-orbit coupling in magnetic metals is worked out from microscopic Hamiltonian describing d-orbitals. When structural inversion symmetry is broken, electron hopping between $d$-orbitals generates chiral ordering of…

Mesoscale and Nanoscale Physics · Physics 2013-01-07 Jin-Hong Park , Choong H. Kim , Hyun-Woo Lee , Jung Hoon Han

Efficient manipulation of magnetic order with electric current pulses is desirable for achieving fast spintronic devices. The Rashba-Edelstein effect, wherein a spin polarization is electrically induced in noncentrosymmetric systems,…

Materials Science · Physics 2024-07-01 Leandro Salemi , Marco Berritta , Ashis K. Nandy , Peter M. Oppeneer
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