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What Limits Magnetic Polaron Energies in DMS?

Published online by Cambridge University Press:  26 February 2011

P. A. Wolff  and
L. R. Ram-Mohan
P. A. Wolff
Affiliation:
Francis Bitter National Magnet Laboratory, MIT, Cambridge, MA 02139 USA
L. R. Ram-Mohan
Affiliation:
Worcester Polytechnic Institute, Worcester, MA 01609 USA
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Extract

Magnetic polarons are ferromagnetic spin clusters created by the exchange interaction of a carrier spin (electron or hole) with localized spins imbedded in a semiconductor lattice. They were first studied in magnetic semiconductors [1]; more recently, there have been extensive investigations [2] of polaron behavior in diluted magnetic semiconductors (DMS), such as Cd1−xMnxTe. DMS are favorable media for magnetic polaron studies because they have simple s-p bands and excellent optical properties. Two types of magnetic polarons have been identified in DMS - the bound magnetic polaron (BMP), whose carrier is localized by an impurity [3], and the free polaron (FP) consisting of a carrier trapped by its own, self-consistently-maintained, exchange potential [4].

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 89: Symposium Q – Diluted Magnetic (Semimagnetic) Semiconductors , 1986 , 1
Copyright
Copyright © Materials Research Society 1987

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References

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