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Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/10839
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dc.contributor.authorIllas i Riera, Francesccat
dc.contributor.authorMoreira, Ibério de Pinho Ribeirocat
dc.contributor.authorGraaf, Coen decat
dc.contributor.authorCastell, O.cat
dc.contributor.authorCasanovas Salas, Jordicat
dc.date.accessioned2010-01-22T13:50:03Z-
dc.date.available2010-01-22T13:50:03Z-
dc.date.issued1997cat
dc.identifier.issn0163-1829cat
dc.identifier.urihttp://hdl.handle.net/2445/10839-
dc.description.abstractExistence of collective effects in magnetic coupling in ionic solids is studied by mapping spin eigenstates of the Heisenberg and exact nonrelativistic Hamiltonians on cluster models representing KNiF3, K2NiF4, NiO, and La2CuO4. Ab initio techniques are used to estimate the Heisenberg constant J. For clusters with two magnetic centers, the values obtained are about the same for models having more magnetic centers. The absence of collective effects in J strongly suggests that magnetic interactions in this kind of ionic solids are genuinely local and entangle only the two magnetic centers involved.eng
dc.format.extent4 p.cat
dc.format.mimetypeapplication/pdfeng
dc.language.isoengeng
dc.publisherThe American Physical Societycat
dc.relation.isformatofReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.56.5069cat
dc.relation.ispartofPhysical Review B, 1997, vol. 56, núm. 9, p. 5069-5072.cat
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevB.56.5069-
dc.rights(c) The American Physical Society, 1997cat
dc.sourceArticles publicats en revistes (Ciència dels Materials i Química Física)-
dc.subject.classificationSuperconductivitatcat
dc.subject.classificationMaterialscat
dc.subject.classificationEstructura electrònicacat
dc.subject.otherSuperconductivityeng
dc.subject.otherMaterialseng
dc.subject.otherElectronic structureeng
dc.titleAbsence of collective effects in Heisenberg systems with localized magnetic momentseng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec125945cat
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
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