Spin-Orbit Coupling, Antilocalization, and Parallel Magnetic Fields in Quantum Dots

TY - JOUR

T1 - Spin-Orbit Coupling, Antilocalization, and Parallel Magnetic Fields in Quantum Dots

AU - Zumbuhl, D.

AU - Miller, Jessica

AU - M. Marcus, C.

AU - Campman, K.

AU - gossard, A.

PY - 2002/8/22

Y1 - 2002/8/22

N2 - We investigate antilocalization due to spin-orbit coupling in ballistic GaAs quantum dots. Antilocalization that is prominent in large dots is suppressed in small dots, as anticipated theoretically. Parallel magnetic fields suppress both antilocalization and also, at larger fields, weak localization, consistent with random matrix theory results once orbital coupling of the parallel field is included. In situ control of spin-orbit coupling in dots is demonstrated as a gate-controlled crossover from weak localization to antilocalization.

AB - We investigate antilocalization due to spin-orbit coupling in ballistic GaAs quantum dots. Antilocalization that is prominent in large dots is suppressed in small dots, as anticipated theoretically. Parallel magnetic fields suppress both antilocalization and also, at larger fields, weak localization, consistent with random matrix theory results once orbital coupling of the parallel field is included. In situ control of spin-orbit coupling in dots is demonstrated as a gate-controlled crossover from weak localization to antilocalization.

KW - cond-mat.mes-hall

KW - cond-mat.mtrl-sci

U2 - 10.1103/PhysRevLett.89.276803

DO - 10.1103/PhysRevLett.89.276803

M3 - Journal article

C2 - 12513231

SN - 0031-9007

VL - 89

SP - 276803

JO - Physical Review Letters

JF - Physical Review Letters

IS - 27

ER -