The spin-dependent semiconductor Bloch equations: a microscopic theory of Bir-Aronov-Pikus spin-relaxation

TL;DR

This paper extends the semiconductor Bloch equations to include spin dynamics, deriving microscopic expressions for spin-relaxation and dephasing rates due to electron-hole exchange interactions, providing a detailed theoretical framework.

Contribution

It introduces a microscopic theory for Bir-Aronov-Pikus spin-relaxation using extended semiconductor Bloch equations with carrier-carrier interactions beyond Hartree-Fock.

Findings

Derived microscopic expressions for spin-relaxation rates.

Analyzed spin-dephasing mechanisms in semiconductors.

Enhanced understanding of spin dynamics with carrier interactions.

Abstract

Semiconductor Bloch equations, in their extension including the spin degree of freedom of the carriers, are capable to describe spin dynamics on a microscopic level. In the presence of free holes, electron spins can flip simultaneously with hole spins due to electron-hole exchange interaction. This mechanism named after Bir, Aronov and Pikus, is described here by using the extended semiconductor Bloch equations and considering carrier-carrier interaction beyond the Hartree-Fock truncation. As a result we derive microscopic expressions for spin-relaxation and spin-dephasing rates.