Spin–orbit-induced hole spin relaxation in a quantum dot molecule: the effect of s-p  coupling

Abstract

We study the effect of the coupling between the hole s shell of one quantum dot and the p shell in the other dot forming a quantum dot molecule on the spin relaxation between the sublevels of the hole s state. Using an effective model that captures the spin-orbit effects in the p shell irrespective of their origin, we show that the strong spin mixing in the p shell can be transferred to the s shell of the other dot, leading to enhanced spin relaxation in a certain energy range around the s-p resonance if the dots are misaligned and the magnetic field is tilted from the sample plane. arXiv:1902.09161v1 [cond-mat.mes-hall]