Oscillation of spin polarization in a two-dimensional hole gas under a perpendicular magnetic field

TL;DR

This paper investigates how spin polarization oscillates in a two-dimensional hole gas under a perpendicular magnetic field, revealing persistent oscillations due to spin-orbit interaction in the strong-coupling regime.

Contribution

It derives exact spin-charge coupled drift-diffusion equations from quantum kinetics to analyze spin polarization behavior in confined hole gases.

Findings

Out-of-plane spin polarization is induced by spin-orbit interaction.

Persistent oscillatory pattern observed in strong-coupling regime.

Exact quantum-kinetic derivation of drift-diffusion equations.

Abstract

Spin-charge coupling is studied for a strongly confined two-dimensional hole gas subject to a perpendicular magnetic field. The study is based on spin-charge coupled drift-diffusion equations derived from quantum-kinetic equations in an exact manner. The spin-orbit interaction induces an extra out-of-plane spin polarization. This contribution exhibits a persistent oscillatory pattern in the strong-coupling regime.