Field Dependence of the Electron Spin Relaxation in Quantum Dots

TL;DR

This paper presents a parameter-free theoretical model describing how electron spin relaxation in quantum dots depends universally on magnetic field strength and direction, based on interactions with phonons and elastic properties.

Contribution

It introduces a universal, parameter-free theory linking electron spin relaxation to magnetic field and elastic constants, testable experimentally.

Findings

Universal dependence of spin relaxation rate on magnetic field

Parameter-free lower bound on relaxation at high fields

Theory matches experimental conditions without unknown parameters

Abstract

Interaction of the electron spin with local elastic twists due to transverse phonons has been studied. Universal dependence of the spin relaxation rate on the strength and direction of the magnetic field has been obtained in terms of the electron gyromagnetic tensor and macroscopic elastic constants of the solid. The theory contains no unknown parameters and it can be easily tested in experiment. At high magnetic field it provides parameter-free lower bound on the electron spin relaxation in quantum dots.