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Spintronics in Nitrides

Published online by Cambridge University Press:  01 February 2011

Tomasz Dietl*
Affiliation:
Laboratory for Cryogenic and Spintronic Research, Institute of Physics, Polish Academy of Sciences and ERATO Semiconductor Spintronics JST Project, al. Lotników 32/46, PL 02–668 Warszawa, Poland; also Chair of Condensed Matter Physics, Institute of Theoretical Physics, Warsaw University, ul. Hoża 69, PL 00 581 Warszawa, Poland.
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Abstract

The report of progress in studies of magnetism in the group III nitrides doped with transition metals and rare earth elements is described taking into account conclusions stemming from the recent advances in understanding of Ga1−x Mnx As, GaAs:MnAs, and related systems. The actual position of magnetic impurities in the host lattice as well as a possible role of structural, atomic, and electronic phase separation is described. The question whether the hole introduced by the Mn impurities is localized tightly on the Mn d-levels or rather on the hybridized p-d bonding states is addressed. The nature of spin-spin interactions and magnetic phases, as provided by theoretical and experimental findings, is outlined, and possible origins of high and low temperature ferromagnetism observed in these systems is discussed. Finally, the suitability of nitrides for single spin manipulation is analyzed considering linear in k spin splitting.

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Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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