Spin-relaxation anisotropy in a 1D quantum dot with strong spin-orbit coupling

Zhi-Hai Liu, Rui Li

Published 2018-01-25Version 1

We study the impacts of the magnetic field direction on the spin dynamics in a one-dimensional quantum dot with strong spin-orbit coupling. The energy spectrum and the corresponding eigen- functions in the quantum dot are exactly obtained. We find that no matter how large the spin-orbit coupling is, the electric-dipole spin transition rate as a function of the magnetic field direction always has a {\pi} periodicity. However, the phonon-induced spin relaxation rate as a function of the magnetic field direction has a {\pi} periodicity only in the weak spin-orbit coupling regime and a 2{\pi} periodicity in the strong spin-orbit coupling regime.