Multiband Electronic Structure of Magnetic Quantum Dots: Numerical Studies

TL;DR

This paper presents a theoretical, self-consistent, temperature-dependent study of magnetic polarons in self-assembled quantum dots, emphasizing multiband electronic structure and spin-orbit effects using the Luttinger-Kohn Hamiltonian.

Contribution

It introduces a novel theoretical approach incorporating multiband effects and spin-orbit interaction for analyzing magnetic polarons in quantum dots.

Findings

Magnetic polarons exhibit significant temperature dependence.

Spin-orbit interaction influences the properties of magnetic polarons.

Multiband effects are crucial for accurate modeling of quantum dot electronic structure.

Abstract

Semiconductor quantum dots (QDs) doped with magnetic impurities have been a focus of continuous research for a couple of decades. A significant effort has been devoted to studies of magnetic polarons (MP) in these nanostructures. These collective states arise through exchange interaction between a carrier confined in a QD and localized spins of the magnetic impurities (typically: Mn). We discuss our theoretical description of various MP properties in self-assembled QDs. We present a self-consistent, temperature-dependent approach to MPs formed by a valence band hole. We use the Luttinger-Kohn k.p Hamiltonian to account for the important effects of spin-orbit interaction.