Conductance measurement of spin-orbit coupling in the two-dimensional electron systems with in-plane magnetic field

TL;DR

This paper proposes a method to determine spin-orbit coupling constants in two-dimensional electron gases by analyzing conductance dependence on in-plane magnetic field orientation and strength.

Contribution

It introduces a novel approach to extract absolute spin-orbit coupling values and the ratio of Rashba and Dresselhaus contributions from conductance measurements.

Findings

Conductance varies with magnetic field orientation and strength.

Method allows for precise determination of spin-orbit coupling constants.

The approach distinguishes between Rashba and Dresselhaus effects.

Abstract

We consider determination of spin-orbit (SO) coupling constants for the two-dimensional electron gas from measurements of electric properties in rotated in-plane magnetic field. %Due to the interplay Due to the SO coupling the electron backscattering is accompanied by spin precession and spin mixing of the incident and reflected electron waves. The competition of the external and SO-related magnetic fields produces a characteristic conductance dependence on the in-plane magnetic field value and orientation which, in turn, allows for determination of the absolute value of the effective spin-orbit coupling constant as well as the ratio of the Rashba and Dresselhaus SO contributions.