# Spin dynamics of hot excitons in diluted magnetic semiconductors with spin-orbit interaction

## TL;DR

This paper investigates how Rashba spin-orbit interaction influences hot exciton spin dynamics in diluted magnetic semiconductors, revealing regimes of accelerated decay, oscillations, and magnetic field control of these effects.

## Contribution

It provides a detailed analysis of spin-orbit effects on exciton spin dynamics and demonstrates magnetic field methods to control these effects in quantum wells.

## Key findings

- Spin-orbit coupling can accelerate spin decay and induce oscillations.
- Small magnetic fields can mitigate or eliminate spin-orbit effects.
- Parameter regimes with strong spin-orbit effects are identified.

## Abstract

We explore the impact of a Rashba-type spin-orbit interaction in the conduction band on the spin dynamics of hot excitons in diluted magnetic semiconductor quantum wells. In materials with strong spin-orbit coupling, we identify parameter regimes where spin-orbit effects greatly accelerate the spin decay and even change the dynamics qualitatively in the form of damped oscillations. Furthermore, we show that the application of a small external magnetic field can be used to either mitigate the influence of spin-orbit coupling or entirely remove its effects for fields above a material-dependent threshold.