Magnetic properties of 3d-impurities substituted in GaAs
2002 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 14, no 12, 3295- p.Article in journal (Refereed) Published
We have calculated the magnetic properties of substituted 3d impurities (Cr-Ni) in a GaAs host by means of first-principles electronic structure calculations. We provide a novel model explaining the ferromagnetic long-range order of III-V dilute magnetic semiconductors. The origin of the ferromagnetism is shown to be delocalized spin-uncompensated As dangling-bond electrons. Besides the quantitative prediction of the magnetic moments, our model provides an understanding of the half-metallicity, and the rise of the critical temperature with the impurity concentration.
Place, publisher, year, edition, pages
2002. Vol. 14, no 12, 3295- p.
IdentifiersURN: urn:nbn:se:uu:diva-48453DOI: 10.1088/0953-8984/14/12/316OAI: oai:DiVA.org:uu-48453DiVA: diva2:76359