Spin dynamics of a confined electron interacting with magnetic or nuclear spins: A semiclassical approach

TL;DR

This paper introduces a semiclassical model for electron spin dynamics interacting with magnetic or nuclear spins, effectively capturing complex behaviors and Berry's phase effects across relevant experimental conditions.

Contribution

It demonstrates that semiclassical models can accurately simulate spin dynamics and Berry's phase effects in systems with many spins, extending previous quantum approach results.

Findings

Reproduces quantum results for spin dynamics

Provides insights into Berry's phase effects

Applicable to spintronic nanostructures

Abstract

A physically transparent and mathematically simple semiclassical model is employed to examine dynamics in the central-spin problem. The results reproduce a number of previous findings obtained by various quantum approaches and, at the same time, provide information on the electron spin dynamics and Berry's phase effects over a wider range of experimentally relevant parameters than available previously. This development is relevant to dynamics of bound magnetic polarons and spin dephasing of an electron trapped by an impurity or a quantum dot, and coupled by a contact interaction to neighboring localized magnetic impurities or nuclear spins. Furthermore, it substantiates the applicability of semiclassical models to simulate dynamic properties of spintronic nanostructures with a mesoscopic number of spins.