Journal Article

PreJuSER-33616

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Curie temperatures of III-V magnetic semiconductors calculated from first-principles

Sato, K.FZJ* ; Dederichs, P. H.FZJ* ; Katayama-Yoshida, H.

2003
EDP Sciences Les Ulis

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Please use a persistent id in citations: doi:10.1209/epl/i2003-00191-8

Abstract: Curie temperatures of the diluted magnetic semiconductors (Ga, Mn) As, (Ga, Mn) N, (Ga, Cr) As and (Ga, Cr) N are evaluated from first principles. The electronic structure is calculated in the local spin density approximation by using the Korringa-Kohn-Rostoker method combined with the coherent potential approximation to describe the substitutional and spin disorder. From the total energy differences between the ferromagnetic state and the spin-glass state, realistic estimations of Curie temperatures are achieved by using a mapping on the Heisenberg model in the mean-field approximation. Effects of additional carrier doping treatments are also investigated. Very large Curie temperatures are obtained, lying above room temperature for ( Ga, Mn) N, ( Ga, Cr) As and ( Ga, Cr) N. Upon hole doping the Curie temperature of (Ga, Mn) N further increases, while (Ga, Mn) As shows a plateau behavior.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theorie III (IFF-TH-III)

Research Program(s):

1. Kondensierte Materie (M02)

Appears in the scientific report 2003

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Database coverage:
Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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