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Curie temperatures of dilute magnetic semiconductors from electronic structure calculations

✍ Scribed by K. Sato; P.H. Dederichs; H. Katayama-Yoshida

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 126 KB
Volume: 376-377
Category: Article
ISSN: 0921-4526
DOI: 10.1016/j.physb.2005.12.161

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✦ Synopsis

The magnetic properties of dilute magnetic semiconductors (DMS) are calculated by using the local density approximation þUðLDA þ UÞ method. In the LDA þ U, occupied d-states in (Ga, Mn)As are predicted at lower energy than in the LDA and p-d exchange interaction explains calculated concentration dependence of Curie temperature very well. In (Ga, Mn)N, unoccupied d states are predicted at higher energy by LDA þ U, resulting in higher Curie temperatures than in LDA at high concentrations due to the suppression of the anti-ferromagnetic super-exchange interaction.

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