Dynamical mean field theory of an effective three-band model for NaxCoO2

Autores
Bourgeois, A.; Aligia, Armando Ángel; Rozenberg, Marcelo Javier
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We derive an effective Hamiltonian for highly correlated t2g states centered at the Co sites of NaxCoO2. The essential ingredients of the model are an O mediated hopping, a trigonal crystal-field splitting, and on-site effective interactions derived from the exact solution of a multiorbital model in a CoO6 cluster, with parameters determined previously. The effective model is solved by dynamical mean field theory. We obtain a Fermi surface and electronic dispersion that agrees well with angle-resolved photoemission spectra. Our results also elucidate the origin of the "sinking pockets" in different doping regimes. © 2009 The American Physical Society.
Fil: Bourgeois, A.. Universite Paris-sud Xi; Francia
Fil: Aligia, Armando Ángel. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Rozenberg, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Materia
Effective Model
Naxcoo2
Dmft
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/61567
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/61567
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Dynamical mean field theory of an effective three-band model for NaxCoO2Bourgeois, A.Aligia, Armando ÁngelRozenberg, Marcelo JavierEffective ModelNaxcoo2Dmfthttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We derive an effective Hamiltonian for highly correlated t2g states centered at the Co sites of NaxCoO2. The essential ingredients of the model are an O mediated hopping, a trigonal crystal-field splitting, and on-site effective interactions derived from the exact solution of a multiorbital model in a CoO6 cluster, with parameters determined previously. The effective model is solved by dynamical mean field theory. We obtain a Fermi surface and electronic dispersion that agrees well with angle-resolved photoemission spectra. Our results also elucidate the origin of the "sinking pockets" in different doping regimes. © 2009 The American Physical Society.Fil: Bourgeois, A.. Universite Paris-sud Xi; FranciaFil: Aligia, Armando Ángel. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Rozenberg, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaAmerican Physical Society2009-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/61567Bourgeois, A.; Aligia, Armando Ángel; Rozenberg, Marcelo Javier; Dynamical mean field theory of an effective three-band model for NaxCoO2; American Physical Society; Physical Review Letters; 102; 6; 1-2009; 664021-6640240031-9007CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.102.066402info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T10:17:26Zoai:ri.conicet.gov.ar:11336/61567instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-11-05 10:17:26.493CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dynamical mean field theory of an effective three-band model for NaxCoO2
title Dynamical mean field theory of an effective three-band model for NaxCoO2
spellingShingle Dynamical mean field theory of an effective three-band model for NaxCoO2
Bourgeois, A.
Effective Model
Naxcoo2
Dmft
title_short Dynamical mean field theory of an effective three-band model for NaxCoO2
title_full Dynamical mean field theory of an effective three-band model for NaxCoO2
title_fullStr Dynamical mean field theory of an effective three-band model for NaxCoO2
title_full_unstemmed Dynamical mean field theory of an effective three-band model for NaxCoO2
title_sort Dynamical mean field theory of an effective three-band model for NaxCoO2
dc.creator.none.fl_str_mv Bourgeois, A.
Aligia, Armando Ángel
Rozenberg, Marcelo Javier
author Bourgeois, A.
author_facet Bourgeois, A.
Aligia, Armando Ángel
Rozenberg, Marcelo Javier
author_role author
author2 Aligia, Armando Ángel
Rozenberg, Marcelo Javier
author2_role author
author
dc.subject.none.fl_str_mv Effective Model
Naxcoo2
Dmft
topic Effective Model
Naxcoo2
Dmft
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We derive an effective Hamiltonian for highly correlated t2g states centered at the Co sites of NaxCoO2. The essential ingredients of the model are an O mediated hopping, a trigonal crystal-field splitting, and on-site effective interactions derived from the exact solution of a multiorbital model in a CoO6 cluster, with parameters determined previously. The effective model is solved by dynamical mean field theory. We obtain a Fermi surface and electronic dispersion that agrees well with angle-resolved photoemission spectra. Our results also elucidate the origin of the "sinking pockets" in different doping regimes. © 2009 The American Physical Society.
Fil: Bourgeois, A.. Universite Paris-sud Xi; Francia
Fil: Aligia, Armando Ángel. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Rozenberg, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
description We derive an effective Hamiltonian for highly correlated t2g states centered at the Co sites of NaxCoO2. The essential ingredients of the model are an O mediated hopping, a trigonal crystal-field splitting, and on-site effective interactions derived from the exact solution of a multiorbital model in a CoO6 cluster, with parameters determined previously. The effective model is solved by dynamical mean field theory. We obtain a Fermi surface and electronic dispersion that agrees well with angle-resolved photoemission spectra. Our results also elucidate the origin of the "sinking pockets" in different doping regimes. © 2009 The American Physical Society.
publishDate 2009
dc.date.none.fl_str_mv 2009-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/61567
Bourgeois, A.; Aligia, Armando Ángel; Rozenberg, Marcelo Javier; Dynamical mean field theory of an effective three-band model for NaxCoO2; American Physical Society; Physical Review Letters; 102; 6; 1-2009; 664021-664024
0031-9007
CONICET Digital
CONICET
url http://hdl.handle.net/11336/61567
identifier_str_mv Bourgeois, A.; Aligia, Armando Ángel; Rozenberg, Marcelo Javier; Dynamical mean field theory of an effective three-band model for NaxCoO2; American Physical Society; Physical Review Letters; 102; 6; 1-2009; 664021-664024
0031-9007
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.102.066402
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1847977749759655936
score 13.121305

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