Gate-Controlled Spin-Orbit Quantum Interference Effects in Lateral Transport

2002/06/30 by J. B. Miller, D. M. Zumbuhl, C. M. Marcus +4 · 2 citations
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.dis-nn

paper · pdf · doi:10.1103/physrevlett.90.076807

published as Phys. Rev. Lett. 90, 076807 (2003) · related papers at http://marcuslab.harvard.edu

arxiv created 2003/03/18 · arxiv updated 2009/11/30

Abstract

In situ control of spin-orbit coupling in coherent transport using a clean GaAs/AlGaAs 2DEG is realized, leading to a gate-tunable crossover from weak localization to antilocalization. The necessary theory of 2D magnetotransport in the presence of spin-orbit coupling beyond the diffusive approximation is developed and used to analyze experimental data. With this theory the Rashba contribution and linear and cubic Dresselhaus contributions to spin-orbit coupling are separately estimated, allowing the angular dependence of spin-orbit precession to be extracted at various gate voltages.

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