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

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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References in corpus (3)

• Spin-orbit coupling effects on quantum transport in lateral semiconductor dots
• Anomalous Rashba spin splitting in two-dimensional hole systems
• Spin-Orbit Coupling, Antilocalization, and Parallel Magnetic Fields in Quantum Dots

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