Manifestation of interdot spin tunneling effects in ordered arrays of quantum dots: An anomalous magnetization of In_{1-x}Mn_xAs

TL;DR

This paper investigates the unusual low-temperature magnetization behavior in ordered In_{1-x}Mn_xAs quantum dot arrays, attributing it to strong interdot spin tunneling effects explained via a mean field model.

Contribution

It introduces a mean field approach to explain the collective magnetic response caused by interdot spin tunneling in quantum dot arrays.

Findings

Experimental magnetization data aligns with the model

Strong spin tunneling influences magnetic properties

Collective response explains anomalous magnetization

Abstract

The anomalous low-temperature behavior of the spontaneous magnetization of ordered arrays of In_{1-x}Mn_xAs quantum dots is discussed. It is shown that the experimental results can be well understood, within a mean field approximation, assuming collective response through rather strong spin tunneling processes between neighbouring dots.