ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
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
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.52.1.pdf
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