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

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

2002-06-19

arxiv.org/abs/cond-mat/0206375v4

Phys. Rev. Lett. 90, 076807 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

related papers at http://marcuslab.harvard.edu

Scientific paper

10.1103/PhysRevLett.90.076807

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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