D'yakonov-Perel' spin relaxation under electron-electron collisions in n-type QWs

TL;DR

This paper investigates how electron-electron collisions influence D'yakonov-Perel' spin relaxation in n-type GaAs/AlGaAs quantum wells, combining theoretical calculations and experimental data to understand temperature effects on spin decoherence.

Contribution

It provides a comprehensive theoretical and experimental analysis of spin relaxation, highlighting the role of electron-electron collisions in high-mobility quantum wells.

Findings

Spin relaxation time depends on temperature and degeneracy of the electron gas.

Electron-electron collisions dominate spin decoherence in high-mobility QWs.

Theoretical predictions align with experimental observations.

Abstract

The D'yakonov-Perel' spin relaxation mechanism in n-doped GaAs/AlGaAs quantum wells (QWs) has been studied both theoretically and experimentally. The temperature dependence of the spin relaxation time has been calculated for arbitrary degeneracy of the 2D electron gas. The comparison between theory and experiment shows that, in high-mobility n-doped QWs, the studied spin decoherence is controlled by electron-electron collisions.