Bound-magnetic-polaron molecule in diluted magnetic semiconductors

TL;DR

This paper develops a comprehensive microscopic theory for the bound-magnetic-polaron molecule in diluted magnetic semiconductors, incorporating complex interactions and spin fluctuations to better understand their properties.

Contribution

It introduces a detailed two-body theoretical framework that includes various magnetic interactions and spin fluctuations for BMPMs in DMS.

Findings

Formulated a complete microscopic model of BMPM

Incorporated both Heisenberg and antiferromagnetic interactions

Accounted for spin fluctuations within the polaron cloud

Abstract

We formulate a complete microscopic theory of a coupled pair of bound magnetic polarons, the bound-magnetic-polaron molecule (BMPM) in a diluted magnetic semiconductor (DMS) by taking into account both a proper two-body nature of the impurity-electron wave function and within the general spin-rotation-invariant approach to the electronic states. We also take into account both the Heisenberg and the antiferromagnetic kinetic-exchange interactions, as well as the ferromagnetic coupling within the common spin BMPM cloud. The thermodynamic fluctuations of the spin cloud within the polaron effective Bohr radius of each polaron are taken as Gaussian.