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Ferromagnetism of magnetic semiconductors--Zhang-Rice limit

By T. Dietl, F. Matsukura and H. Ohno

Abstract

It is suggested that p-d hybridization contributes significantly to the hole binding energy E_b of Mn acceptors in III-V compounds, leading in an extreme case to the formation of Zhang-Rice-like small magnetic polarons. The model explains both strong increase of E_b and evolution of Mn spin-resonance spectrum with the magnitude of valence-band offsets. For such a structure of Mn impurity in III-V materials, possible models accounting for the recently determined Curie temperature of about 940 K in a compensated Ga(0.91)Mn(0.09)N are discussed.Comment: 4 RevTex pages, 2 figure

Topics: Condensed Matter - Materials Science
Publisher: 'American Physical Society (APS)'
Year: 2001
DOI identifier: 10.1103/PhysRevB.66.033203
OAI identifier: oai:arXiv.org:cond-mat/0109245

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