First Principles Study Of The Ferromagnetism In Ga1-xmn Xas Semiconductors

dc.creatorDa Silva A.J.R.
dc.creatorFazzio A.
dc.creatorDos Santos R.R.
dc.creatorOliveira L.E.
dc.date2004
dc.date2015-06-26T14:24:21Z
dc.date2015-11-26T14:13:23Z
dc.date2015-06-26T14:24:21Z
dc.date2015-11-26T14:13:23Z
dc.date.accessioned2018-03-28T21:14:06Z
dc.date.available2018-03-28T21:14:06Z
dc.identifier
dc.identifierJournal Of Physics Condensed Matter. , v. 16, n. 46, p. 8243 - 8250, 2004.
dc.identifier9538984
dc.identifier10.1088/0953-8984/16/46/011
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-10044227463&partnerID=40&md5=e5cc8dca52d00786c22bd4d7073fc2be
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/94426
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/94426
dc.identifier2-s2.0-10044227463
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1242257
dc.descriptionWe have performed ab initio calculations within the density-functional theory for Ga1-xMnxAs As diluted semiconductors. Total energy results unambiguously show that a quasi-localized ↓ hole, with predominant p-like character, surrounds the fully polarized Mn ↑ d 5-electrons. The calculations indicate that the holes form a relatively dispersionless impurity band, thus rendering effectivemass descriptions of hole states open to challenge. We obtain estimates both for the s = 1/2 hole and S = 5/2 Mn exchange coupling, and for the distance dependence of the effective Mn-Mn exchange interaction. The results demonstrate that the effective Mn-Mn coupling is always ferromagnetic, and thus non-RKKY, and is intermediated by the antiferromagnetic coupling of each Mn spin to the holes.
dc.description16
dc.description46
dc.description8243
dc.description8250
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dc.languageen
dc.publisher
dc.relationJournal of Physics Condensed Matter
dc.rightsfechado
dc.sourceScopus
dc.titleFirst Principles Study Of The Ferromagnetism In Ga1-xmn Xas Semiconductors
dc.typeArtículos de revistas


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