Relaxation of the Electron Spin in Quantum Dots Via One- and Two-Phonon Processes

TL;DR

This paper investigates how electron spins in quantum dots relax through one- and two-phonon processes, revealing universal dependencies on magnetic field parameters and elastic properties.

Contribution

It introduces a comprehensive analysis of spin relaxation mechanisms in quantum dots, emphasizing the role of phonon radiation and magnetic field orientation.

Findings

Relaxation rates depend universally on magnetic field strength and direction.

Both direct and Raman phonon processes contribute to spin decay.

Theoretical framework relates spin relaxation to elastic and magnetic properties.

Abstract

We have studied direct and Raman processes of the decay of electron spin states in a quantum dot via radiation of phonons corresponding to elastic twists. 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.