Soft X-ray magnetic circular dichroism study of the ferromagnetic Cr$_{1-\delta}$Te

TL;DR

This study investigates the magnetic properties of Cr$_{1- extdelta}$Te using X-ray absorption and dichroism spectroscopy, revealing that holes mainly reside in Te 5p orbitals and that the material is a charge transfer type with weak dependence on Cr deficiency.

Contribution

It provides a detailed analysis of the electronic structure of Cr$_{1- extdelta}$Te, demonstrating the charge transfer nature and the localization of holes in Te 5p orbitals through experimental and theoretical methods.

Findings

XMCD lineshapes are weakly dependent on Cr deficiency

CrTe classified as a charge transfer material

Holes mainly in Te 5p orbitals

Abstract

The 2p core excited XAS and XMCD spectra of Cr$_{1-\delta}$Te with several concentrations of $\delta$=0.11-0.33 have been measured. The observed XMCD lineshapes are found to very weakly depend on $\delta$. The experimental results are analyzed in terms of the configuration-interaction picture with consideration of hybridization and electron correlation effects. The calculated result shows that CrTe can be classified into a charge transfer type material and created holes preferably exist in Te 5p orbitals in Cr deficient materials Cr$_{1-\delta}$Te, which are in consistence with the observed XMCD feature and the reported band structure calculation.