title: 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 two-dimensional electron gas 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.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Miller
authors.forename: D M
authors.initials: DM
authors.lastname: Zumbühl
authors.forename: C M
authors.initials: CM
authors.lastname: Marcus
authors.forename: Y B
authors.initials: YB
authors.lastname: Lyanda-Geller
authors.forename: D
authors.initials: D
authors.lastname: Goldhaber-Gordon
authors.forename: K
authors.initials: K
authors.lastname: Campman
authors.forename: A C
authors.initials: AC
authors.lastname: Gossard