Semiclassical Monte Carlo Model for In-Plane Transport of Spin-Polarized Electrons in III-V Heterostructures

摘要

We study the in-plane transport of spin-polarized electrons in III-Vsemiconductor quantum wells. The spin dynamics is controlled by the spin-orbitinteraction, which arises via the Dresselhaus (bulk asymmetry) and Rashba (wellasymmetry) mechanisms. This interaction, owing to its momentum dependence,causes rotation of the spin polarization vector, and also produces effectivespin dephasing. The density matrix approach is used to describe the evolutionof the electron spin polarization, while the spatial motion of the electrons istreated semiclassically. Monte Carlo simulations have been carried out fortemperatures in the range 77-300 K.