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

TL;DR

This paper presents a semiclassical Monte Carlo model to analyze in-plane spin-polarized electron transport in III-V heterostructures, emphasizing spin dynamics influenced by spin-orbit interactions at various temperatures.

Contribution

It introduces a combined density matrix and semiclassical Monte Carlo approach to model spin transport and dephasing in III-V quantum wells, accounting for Dresselhaus and Rashba effects.

Findings

Spin polarization rotation due to spin-orbit coupling

Temperature-dependent spin dephasing behavior

Effective modeling of electron spin dynamics in heterostructures

Abstract

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