Weak antilocalization in high-mobility two-dimensional systems

TL;DR

This paper develops a comprehensive theory of weak antilocalization in high-mobility two-dimensional systems, accounting for spin-orbit interactions and providing expressions valid across different regimes and magnetic field strengths.

Contribution

It introduces a new theoretical framework that includes both backscattering and nonbackscattering effects, extending previous models to high-mobility 2D systems with arbitrary spin-orbit coupling.

Findings

Derived expressions valid for ballistic and diffusive regimes

Shows magnetic field dependence differs from earlier theories

Accounts for Rashba and Dresselhaus spin-orbit interactions

Abstract

Theory of weak antilocalization is developed for high-mobility two-dimensional systems. Spin-orbit interaction of Rashba and Dresselhaus types is taken into account. Anomalous magnetoresistance is calculated in the whole range of classically weak magnetic fields and for arbitrary strength of spin-orbit splitting. Obtained expressions are valid for both ballistic and diffusive regimes of weak localization. Proposed theory includes both backscattering and nonbackscattering contributions to the conductivity. It is shown that magnetic field dependence of conductivity in high-mobility structures is not described by earlier theories.