Crossing points in specific-heat curves of the asymmetric Hubbard model

Detalhes bibliográficos
Autor(a) principal: Macêdo, Cláudio Andrade
Data de Publicação: 2002
Outros Autores: Souza, André Maurício Conceição de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFS
Texto Completo: http://link.aps.org/doi/10.1103/PhysRevB.65.153109
https://ri.ufs.br/handle/riufs/466
Resumo: The phenomenon of the crossing points in specific-heat curves C(T,U) versus T of the one-dimensional half-filled-band asymmetric Hubbard model is investigated within the method of small-cluster exact-diagonalization calculations with extrapolation techniques to the infinite chain. A definite region where the crossing points occur is found to exist in a certain range of system parameters R (relative magnitude of the transfer integrals) and U (local interaction). We identify an association between crossing point occurrence and gradual localization of fermions.
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spelling Macêdo, Cláudio AndradeSouza, André Maurício Conceição de2013-03-19T00:28:51Z2013-03-19T00:28:51Z2002-04MACEDO, C. A.; SOUZA, A. M. C. Crossing points in specific-heat curves of the asymmetric Hubbard model. Physical Review B, New York, v. 65, n.15, abr. 2002. Disponível em: <http://link.aps.org/doi/10.1103/PhysRevB.65.153109>. Acesso em: 18 mar. 2013.1550-235Xhttp://link.aps.org/doi/10.1103/PhysRevB.65.153109https://ri.ufs.br/handle/riufs/466©2002 American Physical SocietyThe phenomenon of the crossing points in specific-heat curves C(T,U) versus T of the one-dimensional half-filled-band asymmetric Hubbard model is investigated within the method of small-cluster exact-diagonalization calculations with extrapolation techniques to the infinite chain. A definite region where the crossing points occur is found to exist in a certain range of system parameters R (relative magnitude of the transfer integrals) and U (local interaction). We identify an association between crossing point occurrence and gradual localization of fermions.American Physical SocietyModelo de HubbardMétodo de ClusterCrossing points in specific-heat curves of the asymmetric Hubbard modelinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSinfo:eu-repo/semantics/openAccessTHUMBNAILCrossingPointsHubbard.pdf.jpgCrossingPointsHubbard.pdf.jpgGenerated Thumbnailimage/jpeg1729https://ri.ufs.br/jspui/bitstream/riufs/466/4/CrossingPointsHubbard.pdf.jpg24be0ca7f5985efb6d4ca87c34e66338MD54ORIGINALCrossingPointsHubbard.pdfCrossingPointsHubbard.pdfapplication/pdf47794https://ri.ufs.br/jspui/bitstream/riufs/466/1/CrossingPointsHubbard.pdfe78c0e7761c9a32ede55de142aa59b2bMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://ri.ufs.br/jspui/bitstream/riufs/466/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52TEXTCrossingPointsHubbard.pdf.txtCrossingPointsHubbard.pdf.txtExtracted texttext/plain11877https://ri.ufs.br/jspui/bitstream/riufs/466/3/CrossingPointsHubbard.pdf.txt3b2ab0ea6516e89307c78bc26153c16dMD53riufs/4662013-04-18 18:26:02.982oai:ufs.br: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Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2013-04-18T21:26:02Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false
dc.title.pt_BR.fl_str_mv Crossing points in specific-heat curves of the asymmetric Hubbard model
title Crossing points in specific-heat curves of the asymmetric Hubbard model
spellingShingle Crossing points in specific-heat curves of the asymmetric Hubbard model
Macêdo, Cláudio Andrade
Modelo de Hubbard
Método de Cluster
title_short Crossing points in specific-heat curves of the asymmetric Hubbard model
title_full Crossing points in specific-heat curves of the asymmetric Hubbard model
title_fullStr Crossing points in specific-heat curves of the asymmetric Hubbard model
title_full_unstemmed Crossing points in specific-heat curves of the asymmetric Hubbard model
title_sort Crossing points in specific-heat curves of the asymmetric Hubbard model
author Macêdo, Cláudio Andrade
author_facet Macêdo, Cláudio Andrade
Souza, André Maurício Conceição de
author_role author
author2 Souza, André Maurício Conceição de
author2_role author
dc.contributor.author.fl_str_mv Macêdo, Cláudio Andrade
Souza, André Maurício Conceição de
dc.subject.por.fl_str_mv Modelo de Hubbard
Método de Cluster
topic Modelo de Hubbard
Método de Cluster
description The phenomenon of the crossing points in specific-heat curves C(T,U) versus T of the one-dimensional half-filled-band asymmetric Hubbard model is investigated within the method of small-cluster exact-diagonalization calculations with extrapolation techniques to the infinite chain. A definite region where the crossing points occur is found to exist in a certain range of system parameters R (relative magnitude of the transfer integrals) and U (local interaction). We identify an association between crossing point occurrence and gradual localization of fermions.
publishDate 2002
dc.date.issued.fl_str_mv 2002-04
dc.date.accessioned.fl_str_mv 2013-03-19T00:28:51Z
dc.date.available.fl_str_mv 2013-03-19T00:28:51Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.citation.fl_str_mv MACEDO, C. A.; SOUZA, A. M. C. Crossing points in specific-heat curves of the asymmetric Hubbard model. Physical Review B, New York, v. 65, n.15, abr. 2002. Disponível em: <http://link.aps.org/doi/10.1103/PhysRevB.65.153109>. Acesso em: 18 mar. 2013.
dc.identifier.uri.fl_str_mv http://link.aps.org/doi/10.1103/PhysRevB.65.153109
https://ri.ufs.br/handle/riufs/466
dc.identifier.issn.none.fl_str_mv 1550-235X
dc.identifier.license.pt_BR.fl_str_mv ©2002 American Physical Society
identifier_str_mv MACEDO, C. A.; SOUZA, A. M. C. Crossing points in specific-heat curves of the asymmetric Hubbard model. Physical Review B, New York, v. 65, n.15, abr. 2002. Disponível em: <http://link.aps.org/doi/10.1103/PhysRevB.65.153109>. Acesso em: 18 mar. 2013.
1550-235X
©2002 American Physical Society
url http://link.aps.org/doi/10.1103/PhysRevB.65.153109
https://ri.ufs.br/handle/riufs/466
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFS
instname:Universidade Federal de Sergipe (UFS)
instacron:UFS
instname_str Universidade Federal de Sergipe (UFS)
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institution UFS
reponame_str Repositório Institucional da UFS
collection Repositório Institucional da UFS
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