Weak Antilocalization and Spin Relaxation in Integrable Quantum Dots

Abstract

We study spin relaxation and weak (anti)localization arising from Rashba spin-orbit interaction in ballistic quantum dots with integrable orbital dynamics. We employ a recently developed semiclassical theory for spin-dependent quantum magneto-transport to reveal the dependence of spin dephasing on different types of regular, spatially confined motion. In particular, we analytically derive spin relaxation in circular cavities and compare it with corresponding numerical results. Moreover, we show that different integrable confinement geometries show remarkable differences in their spin evolution.