Green-Function Method for a Mixed-Valence Hamiltonian

Detalhes bibliográficos
Autor(a) principal: Simões, Acirete Souza da Rosa
Data de Publicação: 1984
Outros Autores: Iglesias, Jose Roberto, Anda, Enrique V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/103993
Resumo: A Green-function diagrammatic method is utilized to calculate the occupation number of a narrow (j) band in a mixed-valence system. The method is a generalization of the Hubbard-1 approximation for a two-band Hamiltonian. The results at T=O K indicate the existence of an intermediate-valence state for finite hybridization between the bands, and abrupt transitions for values of G comparable to the half bandwidth of the conduction band. A metal-insulator transition is also obtained.
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spelling Simões, Acirete Souza da RosaIglesias, Jose RobertoAnda, Enrique V.2014-10-01T02:10:17Z19840163-1829http://hdl.handle.net/10183/103993000115612A Green-function diagrammatic method is utilized to calculate the occupation number of a narrow (j) band in a mixed-valence system. The method is a generalization of the Hubbard-1 approximation for a two-band Hamiltonian. The results at T=O K indicate the existence of an intermediate-valence state for finite hybridization between the bands, and abrupt transitions for values of G comparable to the half bandwidth of the conduction band. A metal-insulator transition is also obtained.application/pdfengPhysical review. B, Condensed matter. New York. Vol. 29, no. 6 (Mar. 1984), p. 3085-3089Física da matéria condensadaMetodos de funcoes de greenCompostos de valencia mistaModelo de hubbardTransição metal isolanteGreen-Function Method for a Mixed-Valence HamiltonianEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000115612.pdf000115612.pdfTexto completo (inglês)application/pdf555795http://www.lume.ufrgs.br/bitstream/10183/103993/1/000115612.pdf586c39228d65c565af2e0f7d1bd83b70MD51TEXT000115612.pdf.txt000115612.pdf.txtExtracted Texttext/plain12887http://www.lume.ufrgs.br/bitstream/10183/103993/2/000115612.pdf.txtdb74f502cb0e5ed088ab610daaf82b80MD5210183/1039932023-05-14 03:24:51.953574oai:www.lume.ufrgs.br:10183/103993Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2023-05-14T06:24:51Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Green-Function Method for a Mixed-Valence Hamiltonian
title Green-Function Method for a Mixed-Valence Hamiltonian
spellingShingle Green-Function Method for a Mixed-Valence Hamiltonian
Simões, Acirete Souza da Rosa
Física da matéria condensada
Metodos de funcoes de green
Compostos de valencia mista
Modelo de hubbard
Transição metal isolante
title_short Green-Function Method for a Mixed-Valence Hamiltonian
title_full Green-Function Method for a Mixed-Valence Hamiltonian
title_fullStr Green-Function Method for a Mixed-Valence Hamiltonian
title_full_unstemmed Green-Function Method for a Mixed-Valence Hamiltonian
title_sort Green-Function Method for a Mixed-Valence Hamiltonian
author Simões, Acirete Souza da Rosa
author_facet Simões, Acirete Souza da Rosa
Iglesias, Jose Roberto
Anda, Enrique V.
author_role author
author2 Iglesias, Jose Roberto
Anda, Enrique V.
author2_role author
author
dc.contributor.author.fl_str_mv Simões, Acirete Souza da Rosa
Iglesias, Jose Roberto
Anda, Enrique V.
dc.subject.por.fl_str_mv Física da matéria condensada
Metodos de funcoes de green
Compostos de valencia mista
Modelo de hubbard
Transição metal isolante
topic Física da matéria condensada
Metodos de funcoes de green
Compostos de valencia mista
Modelo de hubbard
Transição metal isolante
description A Green-function diagrammatic method is utilized to calculate the occupation number of a narrow (j) band in a mixed-valence system. The method is a generalization of the Hubbard-1 approximation for a two-band Hamiltonian. The results at T=O K indicate the existence of an intermediate-valence state for finite hybridization between the bands, and abrupt transitions for values of G comparable to the half bandwidth of the conduction band. A metal-insulator transition is also obtained.
publishDate 1984
dc.date.issued.fl_str_mv 1984
dc.date.accessioned.fl_str_mv 2014-10-01T02:10:17Z
dc.type.driver.fl_str_mv Estrangeiro
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/103993
dc.identifier.issn.pt_BR.fl_str_mv 0163-1829
dc.identifier.nrb.pt_BR.fl_str_mv 000115612
identifier_str_mv 0163-1829
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url http://hdl.handle.net/10183/103993
dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review. B, Condensed matter. New York. Vol. 29, no. 6 (Mar. 1984), p. 3085-3089
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