Electron correlations in MnxGa1-xAs as seen by resonant electron spectroscopy and dynamical mean field theory

Abstract : After two decades since the discovery of ferromagnetism in manganese-doped gallium arsenide, its origin is still debated, and many doubts are related to the electronic structure. Here we report an experimental and theoretical study of the valence electron spectrum of manganese-doped gallium arsenide. The experimental data are obtained through the differences between off- and on-resonance photo emission data. The theoretical spectrum is calculated by means of a combination of density-functional theory in the local density approximation and dynamical mean field theory, using exact diagonalization as impurity solver. Theory is found to accurately reproduce measured data and illustrates the importance of correlation effects. Our results demonstrate that the manganese states extend over a broad range of energy, including the top of the valence band, and that no impurity band splits-off from the valence band edge, whereas the induced holes seem located primarily around the manganese impurity.
Type de document :
Article dans une revue
Nature Communications, Nature Publishing Group, 2013, 4, 〈10.1038/ncomms3645〉
Liste complète des métadonnées

Littérature citée [54 références]  Voir  Masquer  Télécharger

https://hal.univ-lorraine.fr/hal-01520891
Contributeur : Crm2 Ul <>
Soumis le : vendredi 12 mai 2017 - 10:15:59
Dernière modification le : jeudi 11 janvier 2018 - 06:23:18
Document(s) archivé(s) le : dimanche 13 août 2017 - 12:29:22

Fichier

ncomms3645.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

I. Di Marco, P. Thunstrom, M. I. Katsnelson, J. Sadowski, K. Karlsson, et al.. Electron correlations in MnxGa1-xAs as seen by resonant electron spectroscopy and dynamical mean field theory. Nature Communications, Nature Publishing Group, 2013, 4, 〈10.1038/ncomms3645〉. 〈hal-01520891〉

Partager

Métriques

Consultations de la notice

49

Téléchargements de fichiers

35