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We show that a finite magnetic flux threading a multichannel semiconductor ring induces spin accumulation at the borders of the sample when the Rashba spin-orbit interaction is taken into account even in the absence of external electric…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 G. S. Lozano , M. J. Sánchez

We report normal and superconducting properties of the Rashba-type noncentrosymmetric com- pound CaIrSi3, using single crystalline samples with nearly 100% superconducting volume fraction. The electronic density of states revealed by the…

Superconductivity · Physics 2012-11-22 G. Eguchi , H. Wadati , T. Sugiyama , E. Ikenaga , S. Yonezawa , Y. Maeno

We investigate the influence of a perpendicular magnetic field on the spectral and spin properties of a ballistic quasi-one-dimensional electron system with Rashba effect. The magnetic field strongly alters the spin-orbit induced…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Stefan Debald , Bernhard Kramer

Two-dimensional (2D) Rashba systems have been intensively studied in the last decade due to their unconventional physics, tunability capabilities, and potential for spin-charge interconversion when compared to conventional heavy metals.…

Mesoscale and Nanoscale Physics · Physics 2020-07-08 D. C. Vaz , F. Trier , A. Dyrdał , A. Johansson , K. Garcia , A. Barthélémy , I. Mertig , J. Barnaś , A. Fert , M. Bibes

We demonstrate experimentally and theoretically that two-dimensional (2D) heavy hole systems in single heterostructures exhibit a \emph{decrease} in spin-orbit interaction-induced spin splitting with an increase in perpendicular electric…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 B. Habib , E. Tutuc , S. Melinte , M. Shayegan , D. Wasserman , S. A. Lyon , R. Winkler

In time-resolved Faraday rotation experiments we have detected an inplane anisotropy of the electron spin-dephasing time (SDT) in an $n$--modulation-doped GaAs/Al$_{0.3}$Ga$_{0.7}$As single quantum well. The SDT was measured with magnetic…

Materials Science · Physics 2007-08-15 D. Stich , J. H. Jiang , T. Korn , R. Schuh , D. Schuh , W. Wegscheider , M. W. Wu , C. Schüller

The spin-degeneracy of Bloch bands in a crystal can be lifted when spin-orbit (SO) coupling is present and inversion symmetry is absent. In two-dimensional electron systems (2DES) spin-degeneracy is lifted by Rashba interaction terms -…

Strongly Correlated Electrons · Physics 2013-07-16 Guru Khalsa , Byounghak Lee , A. H. MacDonald

The NbSe$_2$ monolayer with Rashba spin-orbit coupling represents a paradigmatic example of an Ising superconductor on a substrate. Using a single-band model and symmetry analysis, we present general superconducting pairing functions beyond…

Superconductivity · Physics 2024-07-16 Jozef Haniš , Marko Milivojević , Martin Gmitra

Microscopic mechanism for the Rashba-type band splitting is examined in detail. We show how asymmetric charge distribution is formed when local orbital angular momentum (OAM) and crystal momentum get interlocked due to surface effects. An…

We use $\vec{k}\cdot\vec{p}$ theory to estimate the Rashba spin-orbit coupling (SOC) in large semiconductor nanowires. We specifically investigate GaAs- and InSb-based devices with different gate configurations to control symmetry and…

Mesoscale and Nanoscale Physics · Physics 2018-04-11 Paweł Wójcik , Andrea Bertoni , Guido Goldoni

We investigate the two-dimensional (2D) highly spin-polarized electron accumulation layers commonly appearing near the surface of n-type polar semiconductors BiTeX (X = I, Br, and Cl) by angular-resolved photoemission spectroscopy. Due to…

We obtain the spin-orbit interaction and spin-charge coupled transport equations of a two-dimensional heavy hole gas under the influence of strain and anisotropy. We show that a simple two-band Hamiltonian can be used to describe the holes.…

Mesoscale and Nanoscale Physics · Physics 2015-06-17 Vincent E. Sacksteder , B. Andrei Bernevig

We present an in-depth study of the spin-orbit (SO) interactions occurring in inversion-asymmetric two-dimensional hole gases at semiconductor heterointerfaces. We focus on common semiconductors such as GaAs, InAs, InSb, Ge, and Si. We…

Mesoscale and Nanoscale Physics · Physics 2017-02-21 E. Marcellina , A. R. Hamilton , R. Winkler , Dimitrie Culcer

In systems with broken inversion symmetry spin-orbit coupling (SOC) yields a Rashba-type spin splitting of electronic states, manifested in a k-dependent splitting of the bands. While most research had previously focused on 2D electron…

This article presents an overview of results pertaining to electronic structure, transport properties, and interaction effects in ballistic quantum wires with Rashba spin splitting. Limits of weak and strong spin--orbit coupling are…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 M. Governale , U. Zuelicke

We propose a semiconductor structure that can rotate the electron spin without using ferromagnetic contacts, tunneling barriers, external radiation etc. The structure consists of a strongly curved one-dimensional ballistic wire with…

Mesoscale and Nanoscale Physics · Physics 2018-05-03 Maxim P. Trushin , Alexander L. Chudnovskiy

Nonrelativistic spin splitting (NRSS) challenges conventional wisdom about antiferromagnets by allowing spin-split electronic bands even in collinear orders with zero net magnetization. This sub-class of antiferromagnets, recently dubbed…

Magnetotunnelling spectroscopy of resonant tunnelling structures provides information on the nature of the two-dimensional electron gas in the well. We describe a model based on nonequilibrium Green's functions that allows for a…

Mesoscale and Nanoscale Physics · Physics 2015-05-28 Goran Isić , Dragan Indjin , Vitomir Milanović , Jelena Radovanović , Zoran Ikonić , Paul Harrison

We have studied spin dephasing in a high-mobility two-dimensional electron system (2DES), confined in a GaAs/AlGaAs quantum well grown in the [110] direction, using the resonant spin amplification (RSA) technique. From the characteristic…

Materials Science · Physics 2013-05-30 M. Griesbeck , M. M. Glazov , E. Ya. Sherman , D. Schuh , W. Wegscheider , C. Schüller , T. Korn

Our recently reported spin and angular resolved photoemission (SARPES) results on an epitaxial graphene monolayer on SiC(0001) suggested the presence of a large Rashba-type spin splitting of \Delta k=(0.030+-0.005)1/A [1]. Although this…