Electron correlations in Mn(x)Ga(1–x)As as seen by resonant electron spectroscopy and dynamical mean field theory
(2013) In Nature Communications 4. p.6-2645- 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.... (More) - 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4124547
- author
- Di Marco, I. ; Thunström, P. ; Katsnelson, M. I. ; Sadowski, Janusz LU ; Karlsson, K. ; Lebegue, S. ; Kanski, Janusz and Eriksson, Olle
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Communications
- volume
- 4
- pages
- 6 - 2645
- publisher
- Nature Publishing Group
- external identifiers
-
- wos:000326472400008
- scopus:84886715174
- pmid:24141268
- ISSN
- 2041-1723
- DOI
- 10.1038/ncomms3645
- language
- English
- LU publication?
- yes
- id
- 258d4f3c-4e56-4997-a103-74db8fc3e65e (old id 4124547)
- date added to LUP
- 2016-04-01 13:53:28
- date last changed
- 2022-01-27 21:38:20
@article{258d4f3c-4e56-4997-a103-74db8fc3e65e,
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<br/><br>
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<br/><br>
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.}},
author = {{Di Marco, I. and Thunström, P. and Katsnelson, M. I. and Sadowski, Janusz and Karlsson, K. and Lebegue, S. and Kanski, Janusz and Eriksson, Olle}},
issn = {{2041-1723}},
language = {{eng}},
pages = {{6--2645}},
publisher = {{Nature Publishing Group}},
series = {{Nature Communications}},
title = {{Electron correlations in Mn(x)Ga(1–x)As as seen by resonant electron spectroscopy and dynamical mean field theory}},
url = {{http://dx.doi.org/10.1038/ncomms3645}},
doi = {{10.1038/ncomms3645}},
volume = {{4}},
year = {{2013}},
}