Interplay of Rashba and Dresselhaus spin splittings in 2D weak localization

TL;DR

This paper investigates how Rashba and Dresselhaus spin-orbit interactions influence weak localization in 2D systems, proposing a comprehensive theory and analyzing the suppression of antilocalization as these interactions become comparable.

Contribution

A unified weak localization theory accounting for both Rashba and Dresselhaus effects across all magnetic fields is developed and validated.

Findings

Suppression of antilocalization when Rashba and Dresselhaus strengths are similar

Analysis of cubic spin-splitting effects on magnetoresistance

Theoretical framework applicable over the entire magnetic field range

Abstract

The effects of structural (Rashba) and bulk (Dresselhaus) spin-orbit interaction terms on the low-field magnetoresistance are investigated in high-quality two dimensional systems. The weak localization theory accounting for both of these terms valid in the whole range of magnetic fields is proposed. The suppresion of antilocalization correction as Rashba and Dresselhaus terms strengths approach each other is demonstrated. The effect of cubic in the wavevector spin-splitting term is analyzed.