Coherent Aharonov Bohm oscillations in type-II (ZnMn)Te quantum dots

TL;DR

This paper demonstrates Aharonov-Bohm oscillations in the magneto-photoluminescence of type-II (ZnMn)Te quantum dots, revealing control over optical quantum effects and interplay with spin polarization in magnetic semiconductor nanostructures.

Contribution

It provides experimental evidence of coherent Aharonov-Bohm oscillations in diluted magnetic quantum dots and explores their dependence on magnetic field and spin polarization.

Findings

AB oscillations increase with magnetic field

Optical polarization enhances coherence

Interplay between AB effect and spin polarization

Abstract

The magneto-photoluminescence of type-II (ZnMn)Te quantum dots is presented. As a result of the type-II band alignment Aharonov-Bohm (AB) oscillations in the photoluminescence intensity are evident, confirming previous predictions for the suitability of this geometry to control the optical Aharonov-Bohm effect in semiconductor systems. Moreover, the system demonstrates an interesting interplay between the AB effect and the spin polarization in diluted magnetic semiconductor quantum dots. The intensity of the AB oscillations increases with both magnetic field and the degree of optical polarization, indicating the suppression of spin fluctuations improves the coherence of the system.