Quantum interference in exciton-Mn spin interactions in a CdTe semiconductor quantum dot

TL;DR

This paper demonstrates a new quantum interference effect in CdTe quantum dots involving exciton-Mn interactions, combining theoretical modeling and experimental photoluminescence spectroscopy to enable control over light-magnetic impurity interactions.

Contribution

It introduces a theoretical and experimental framework for quantum interference effects in exciton-Mn interactions, allowing for engineered control of light-magnetic impurity coupling.

Findings

Identification of a quantum interference effect between electron-hole interactions and Mn scattering.

Theoretical model including electron-hole correlations and exchange interactions.

Experimental validation through photoluminescence spectroscopy.

Abstract

We show theoretically and experimentally the existence of a new quantum interference(QI) effect between the electron-hole interactions and the scattering by a single Mn impurity. Theoretical model, including electron-valence hole correlations, the short and long range exchange interaction of Mn ion with the heavy hole and with electron and anisotropy of the quantum dot, is compared with photoluminescence spectroscopy of CdTe dots with single magnetic ions. We show how design of the electronic levels of a quantum dot enable the design of an exciton, control of the quantum interference and hence engineering of light-Mn interaction.