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Medientyp:
Elektronischer Konferenzbericht
Titel:
Transport Properties of (Ga,Mn)As Diluted Magnetic Semiconductors in the Bulk and in Layered Systems
Beteiligte:
Turek, Ilja;
Carva, K.;
Kudrnovsky, J.
Erschienen:
Trans Tech Publications Ltd, 2006
Erschienen in:
Advances in Science and Technology (2006)
Umfang:
Sprache:
Nicht zu entscheiden
DOI:
10.4028/www.scientific.net/ast.52.1
ISSN:
1662-0356
Entstehung:
Anmerkungen:
Beschreibung:
Transport properties of systems based on diluted magnetic semiconductors (Ga,Mn)Asare investigated theoretically by means of the Kubo linear response theory. The underlyingelectronic structure is obtained within the local spin-density approximation using the scalarrelativistictight-binding linear muffin-tin orbital (TB-LMTO) method. The effect of substitutionalrandomness on the electronic structure and on the transport properties is systematically described inthe coherent potential approximation (CPA). The quantities studied include the residual resistivitiesof the bulk alloys as well as conductances of epitaxial trilayers Cr/(Ga,Mn)As/Cr (001) in thecurrent-perpendicular-to-plane (CPP) orientation. The results witness that various compensatingdefects such as As antisite atoms and Mn interstitials have much stronger detrimental effect on thespin polarization of the CPP conductances as compared to their influence on the spin polarization ofthe bulk conductivities.