Spin polarizations and spin Hall currents in a two-dimensional electron gas with magnetic impurities

TL;DR

This paper investigates how magnetic impurities and disorder influence spin polarization and spin Hall effects in a 2D electron gas with Rashba spin-orbit coupling, using quasiclassical Green functions.

Contribution

It provides a comprehensive analysis of spin-charge dynamics considering both magnetic and non-magnetic disorder effects in a 2D electron gas.

Findings

Magnetic impurities significantly modify spin polarization.

Disorder affects the magnitude of spin Hall currents.

Results are valid across all disorder regimes.

Abstract

We consider a two-dimensional electron gas in the presence of Rashba spin-orbit coupling, and study the effects of magnetic s-wave impurities and long-range non-magnetic disorder on the spin-charge dynamics of the system. We focus on voltage induced spin polarizations and their relation to spin Hall currents. Our results are obtained using the quasiclassical Green function technique, and hold in the full range of the disorder parameter $\alpha p_F\tau$.