Time-resolved optically detected magnetic resonance (ODMR) is a valuable technique to study the local deformation of the crystal lattice around magnetic ion as well as the ion spin relaxation time. Here we utilize selective Mn-doping to additionally enhance the inherent locality of the ODMR technique. We present the time-resolved ODMR studies of single {(Cd,Mg)Te/(Cd,Mn)Te} quantum wells (QWs) with manganese ions located at different positions along the growth axis -- in the center or on the sides of the quantum well. We observe that spin-lattice relaxation of Mn2+ significantly depends on the ion-carrier wavefunction overlap at low-magnetic fields. Interestingly, the effect is clearly observed in spite of very low carrier density, which suggests the potential for control of the Mn2+ ion relaxation rate by means of the electric field in future experiments.
@article{arxiv.2205.02890,
title = {Magnetic ion relaxation time distribution within a quantum well},
author = {Aleksandra Łopion and Aleksander Bogucki and Wiktor Kraśnicki and Karolina E. Połczyńska and Wojciech Pacuski and Tomasz Kazimierczuk and Andrzej Golnik and Piotr Kossacki},
journal= {arXiv preprint arXiv:2205.02890},
year = {2023}
}