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Volume dependence of the Curie temperatures in diluted magnetic semiconductors
Institut für Festkörperforschung, Forschungszentrum Jülich.ORCID iD: 0000-0003-4341-5663
2008 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 77, no 1, 014418- p.Article in journal (Refereed) Published
Abstract [en]

Using electronic structure methods and statistical methods, we have studied theoretically the volume dependence of the exchange interactions and Curie temperatures in the diluted magnetic semiconductors. In both Mn-doped GaAs and Mn-doped InAs, the calculated Curie temperatures from numerical exact Monte Carlo simulations are more or less constant for a large volume interval. We have compared the exchange mechanisms in Mn-doped GaAs using both the local density approximation (LDA) and the LDA+U method. It is demonstrated that the magnetic properties are understood within Zener’s p-d exchange model for the LDA+U, while in LDA they reflect a mixture between double and p-d exchange mechanisms.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2008. Vol. 77, no 1, 014418- p.
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-64404DOI: 10.1103/PhysRevB.77.014418ISI: 000252862200060OAI: diva2:483073
QC 20120202Available from: 2012-01-24 Created: 2012-01-24 Last updated: 2012-02-02Bibliographically approved

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Bergqvist, Lars
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