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Electronic Theory of Mn - Alloyed Diluted Magnetic Semiconductors

Published online by Cambridge University Press:  26 February 2011

H. Ehrenreich ,
K. C. Hass ,
B. E. Larson  and
N. F. Johnson
H. Ehrenreich
Affiliation:
Harvard University, Division of Applied Sciences and Department of Physics, Cambridge, Massachusetts 02138
K. C. Hass
Affiliation:
Also at MIT, Dept. of Physics, Cambridge, MA 02139
B. E. Larson
Affiliation:
Harvard University, Division of Applied Sciences and Department of Physics, Cambridge, Massachusetts 02138
N. F. Johnson
Affiliation:
Harvard University, Division of Applied Sciences and Department of Physics, Cambridge, Massachusetts 02138
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Abstract

Recent calculations of the electronic structure and magnetic interactions in Mn - alloyed II-VI diluted magnetic semiconductors (DMS) are summarized. Detailed band structure results are obtained using an empirical tight-binding, coherent potential approximation approach with input from experiment and local spin density band calculations. The dominant magnetic interactions in these systems result from hybridization between spin-split Mn d states and sp valence bands. Superexchange between Mn moments is well described by a simple three-level model which yields accurate Mn - Mn exchange constants for a variety of II-VI DMS as well as the rocksalt insulators MnO and α-MnS.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 89: Symposium Q – Diluted Magnetic (Semimagnetic) Semiconductors , 1986 , 187
Copyright
Copyright © Materials Research Society 1987

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