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Effect of band filling in the Kondo lattice : a mean-field approach

dc.contributor.authorRuppenthal, Alaor Ricardopt_BR
dc.contributor.authorIglesias, Jose Robertopt_BR
dc.contributor.authorGusmao, Miguel Angelo Cavalheiropt_BR
dc.date.accessioned2014-10-09T02:12:48Zpt_BR
dc.date.issued1999pt_BR
dc.identifier.issn1098-0121pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/104292pt_BR
dc.description.abstractThe usual Kondo lattice, including an antiferromagnetic exchange interaction between nearest-neighboring localized spins, is treated here in a mean-field scheme that introduces two mean-field parameters: one associated with the local Kondo effect, and the other related to the magnetic correlations between localized spins. Phases with short-range magnetic correlations or coexistence between those and the Kondo effect are obtained. By varying the number of electrons in the conduction band, we notice that the Kondo effect tends to be suppressed away from half filling, while magnetic correlations can survive if the Heisenberg coupling is strong enough. An enhanced linear coefficient of the specific heat is obtained at low temperatures in the metallic state.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review. B, Condensed matter and materials physics. New York. Vol. 60, no. 10 (Sept. 1999), p. 7321-7327pt_BR
dc.rightsOpen Accessen
dc.subjectFisica teorica da materia condensadapt_BR
dc.subjectEfeito kondopt_BR
dc.subjectAntiferromagnetismopt_BR
dc.subjectModelo de heisenbergpt_BR
dc.subjectMagnetismopt_BR
dc.subjectSistemas eletronicos fortemente correlacionadospt_BR
dc.titleEffect of band filling in the Kondo lattice : a mean-field approachpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000269715pt_BR
dc.type.originEstrangeiropt_BR


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