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Related papers: Spin-orbit interaction in InAs/GaSb heterostructur…

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We evaluate the transport coefficients of a two-dimensional electron gas (2DEG) in the presence of a perpendicular magnetic field and of the spin-orbit interaction (SOI) described only by the Rashba term. The SOI mixes the spin-up and…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 X. F. Wang , P. Vasilopoulos

We present calculations of the spin and phase relaxation rates in GaAs/AlGaAs $p$-type quantum wells. These rates are used to derive the temperature dependence of the weak-localization correction to the conductivity. In $p$-type quantum…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 L. E. Golub , S. Pedersen

We investigate theoretically the spin states in InAs/AlSb/GaSb broken-gap quantum wells by solving the Kane model and the Poisson equation self-consistently. The spin states in InAs/AlSb/GaSb quantum wells are quite different from those…

Mesoscale and Nanoscale Physics · Physics 2009-11-04 Jun Li , Wen Yang , Kai Chang

We report a systematic study on strong enhancement of spin-orbit interaction (SOI) in graphene driven by transition-metal dichalcogenides (TMDs). Low temperature magnetotoransport measurements of graphene proximitized to different TMDs…

Mesoscale and Nanoscale Physics · Physics 2019-06-12 T. Wakamura , F. Reale , P. Palczynski , M. Q. Zhao , A. T. C. Johnson , S. Guéron , C. Mattevi , A. Ouerghi , H. Bouchiat

We investigate spin transport in InSb/InAlSb heterostructure using the Monte Carlo approach, generalized by including density matrix description of spin for taking spin dynamics into account. In addition to the dominant Dyakonov-Perel (DP)…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 Akashdeep Kamra , Bahniman Ghosh , Tarun K. Ghosh

We study the spin dynamics in a high-mobility two dimensional electron gas (2DEG) with generic spin-orbit interactions (SOIs). We derive a set of spin dynamic equations which capture the purely exponential to the damped oscillatory spin…

Materials Science · Physics 2015-05-27 Xin Liu , Xiong-Jun Liu , Jairo Sinova

We derive a closed-form expression for the weak localization (WL) corrections to the magnetoconductivity of a 2D electron system with arbitrary Rashba $\alpha$ and Dresselhaus $\beta$ (linear) and $\beta_3$ (cubic) spin-orbit interaction…

Mesoscale and Nanoscale Physics · Physics 2019-04-24 D. C. Marinescu , Pirmin J. Weigele , J. Carlos Egues , Dominik Zumbühl

Using time-resolved Faraday rotation, the drift-induced spin-orbit Field of a two-dimensional electron gas in an InGaAs quantum well is measured. Including measurements of the electron mobility, the Dresselhaus and Rashba coefficients are…

Mesoscale and Nanoscale Physics · Physics 2009-01-06 M. Studer , S. Schön , K. Ensslin , G. Salis

We have for the first time experimentally investigated the weak localisation magnetoresistance in a AlGaAs/GaAs p-type quantum well. The peculiarity of such systems is that spin-orbit interaction is strong. On the theoretical side it is not…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 S. Pedersen , C. B. Sorensen , A. Kristensen , P. E. Lindelof , L. E. Golub , N. S. Averkiev

We present a comprehensive study of the low-field magnetoresistance in carbon doped p-type GaAs/AlGaAs heterostructures aiming at the investigation of spin-orbit interaction effects. The following signatures of exceptionally strong…

Mesoscale and Nanoscale Physics · Physics 2008-03-30 Boris Grbic , Renaud Leturcq , Thomas Ihn , Klaus Ensslin , Dirk Reuter , Andreas D. Wieck

The discovery of intrinsic spin orbit fields in noncentrosymmetric ferromagnets has attracted considerable interest for both fundamental studies and technological applications. However, once such materials are synthesized, the strength of…

The spin-orbit interaction (SOI) of the two-dimensional hole gas in the inversion symmetric semiconductor Ge is studied in a strained-Ge/SiGe quantum well structure. We observed weak anti-localization (WAL) in the magnetoconductivity…

Semiconductor nanowires featuring strong spin-orbit interactions (SOI), represent a promising platform for a broad range of novel technologies, such as spintronic applications or topological quantum computation. However, experimental…

We discover weak antilocalization effect of two-dimensional electron gas with one electric subband occupied in the inversion layer on p-type HgCdTe crystal. By fitting the model of Iordanskii, Lyanda-Geller and Pikus to data at varies…

Disordered Systems and Neural Networks · Physics 2010-10-19 Rui Yang , Guolin Yu , Xinzhi Liu , Tie Lin , Shaoling Guo , Ning Dai , Junhao Chu , Yanfeng Wei , Jianrong Yang , Li He

Spin dephasing via the spin-orbit interaction (SOI) is a major mechanism limiting the electron spin lifetime in III-V zincblende quantum wells. The dephasing can be suppressed in GaAs(111) quantum wells by applying an electric field. The…

Mesoscale and Nanoscale Physics · Physics 2019-03-25 A. Hernández-Mínguez , K. Biermann , R. Hey , P. V. Santos

The spin relaxation of a two-dimensional electron system (2DES) formed in a symmetric quantum well is studied theoretically when the quantum well is parallel to the (110) plane of the zinc-blende structure, the spin polarization is…

Mesoscale and Nanoscale Physics · Physics 2014-02-28 Hiroshi Akera , Hidekatsu Suzuura , Yoshiyuki Egami

Spin-orbit coupling in solids describes an interaction between an electron's spin, an internal quantum-mechanical degree of freedom, with its linear momentum, an external property. Spin-orbit interaction, due to its relativistic nature, is…

Mesoscale and Nanoscale Physics · Physics 2014-08-07 J. Shabani , Younghyun Kim , A. P. McFadden , R. M. Lutchyn , C. Nayak , C. J. palmstrøm

Spin-orbit interaction (SOI) plays a key role in creating Majorana zero modes in semiconductor nanowires proximity coupled to a superconductor. We track the evolution of the induced superconducting gap in InSb nanowires coupled to a NbTiN…

We present a study of modulation of spin-orbit interaction (SOI) at the interface of LaTiO$_3$/SrTiO$_3$ by $\delta$-doping with an iso-structural ferromagnetic perovskite LaCoO$_3$. The sheet carrier density at the interface decreases…

Strongly Correlated Electrons · Physics 2016-10-18 Shubhankar Das , Z. Hossain , R. C. Budhani

Coherent electron spin dynamics in 10-nm-wide InGaAs/InAlAs quantum wells is studied from 10 K to room temperature using time-resolved Kerr rotation. The spin lifetime exceeds 1 ns at 10 K and decreases with temperature. By varying the…

Mesoscale and Nanoscale Physics · Physics 2016-11-03 T. Henn , L. Czornomaz , G. Salis