Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach

Autores
Mezio, Alejandro; McKenzie, Ross H.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We use the Kotliar-Ruckenstein slave-boson formalism to study the temperature dependence of paramagnetic phases of the one-band Hubbard model for a variety of band structures. We calculate the Fermi liquid quasiparticle spectral weight Z and identify the temperature at which it decreases significantly to a crossover to a bad metal region. Near the Mott metal-insulator transition, this coherence temperature Tcoh is much lower than the Fermi temperature of the uncorrelated Fermi gas, as is observed in a broad range of strongly correlated electron materials. After a proper rescaling of temperature and interaction, we find a universal behavior that is independent of the band structure of the system. We obtain the temperature-interaction phase diagram as function of doping, and we compare the temperature dependence of the double occupancy, entropy, and charge compressibility with previous results obtained with dynamical mean-field theory. We analyze the stability of the method by calculating the charge compressibility.
Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina. University of Queensland; Australia
Fil: McKenzie, Ross H.. University of Queensland; Australia
Materia
METAL-INSULATOR TRANSITION
STRONGLY CORRELATED SYSTEMS
HUBBARD MODEL
SLAVE BOSONS
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:11336/185868
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/185868
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approachMezio, AlejandroMcKenzie, Ross H.METAL-INSULATOR TRANSITIONSTRONGLY CORRELATED SYSTEMSHUBBARD MODELSLAVE BOSONShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We use the Kotliar-Ruckenstein slave-boson formalism to study the temperature dependence of paramagnetic phases of the one-band Hubbard model for a variety of band structures. We calculate the Fermi liquid quasiparticle spectral weight Z and identify the temperature at which it decreases significantly to a crossover to a bad metal region. Near the Mott metal-insulator transition, this coherence temperature Tcoh is much lower than the Fermi temperature of the uncorrelated Fermi gas, as is observed in a broad range of strongly correlated electron materials. After a proper rescaling of temperature and interaction, we find a universal behavior that is independent of the band structure of the system. We obtain the temperature-interaction phase diagram as function of doping, and we compare the temperature dependence of the double occupancy, entropy, and charge compressibility with previous results obtained with dynamical mean-field theory. We analyze the stability of the method by calculating the charge compressibility.Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina. University of Queensland; AustraliaFil: McKenzie, Ross H.. University of Queensland; AustraliaAmerican Physical Society2017-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/185868Mezio, Alejandro; McKenzie, Ross H.; Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 96; 3; 7-2017; 1-101098-01212469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://link.aps.org/doi/10.1103/PhysRevB.96.035121info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.96.035121info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:40:59Zoai:ri.conicet.gov.ar:11336/185868instacron: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:34982025-09-29 10:40:59.532CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
title Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
spellingShingle Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
Mezio, Alejandro
METAL-INSULATOR TRANSITION
STRONGLY CORRELATED SYSTEMS
HUBBARD MODEL
SLAVE BOSONS
title_short Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
title_full Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
title_fullStr Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
title_full_unstemmed Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
title_sort Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach
dc.creator.none.fl_str_mv Mezio, Alejandro
McKenzie, Ross H.
author Mezio, Alejandro
author_facet Mezio, Alejandro
McKenzie, Ross H.
author_role author
author2 McKenzie, Ross H.
author2_role author
dc.subject.none.fl_str_mv METAL-INSULATOR TRANSITION
STRONGLY CORRELATED SYSTEMS
HUBBARD MODEL
SLAVE BOSONS
topic METAL-INSULATOR TRANSITION
STRONGLY CORRELATED SYSTEMS
HUBBARD MODEL
SLAVE BOSONS
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 use the Kotliar-Ruckenstein slave-boson formalism to study the temperature dependence of paramagnetic phases of the one-band Hubbard model for a variety of band structures. We calculate the Fermi liquid quasiparticle spectral weight Z and identify the temperature at which it decreases significantly to a crossover to a bad metal region. Near the Mott metal-insulator transition, this coherence temperature Tcoh is much lower than the Fermi temperature of the uncorrelated Fermi gas, as is observed in a broad range of strongly correlated electron materials. After a proper rescaling of temperature and interaction, we find a universal behavior that is independent of the band structure of the system. We obtain the temperature-interaction phase diagram as function of doping, and we compare the temperature dependence of the double occupancy, entropy, and charge compressibility with previous results obtained with dynamical mean-field theory. We analyze the stability of the method by calculating the charge compressibility.
Fil: Mezio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina. University of Queensland; Australia
Fil: McKenzie, Ross H.. University of Queensland; Australia
description We use the Kotliar-Ruckenstein slave-boson formalism to study the temperature dependence of paramagnetic phases of the one-band Hubbard model for a variety of band structures. We calculate the Fermi liquid quasiparticle spectral weight Z and identify the temperature at which it decreases significantly to a crossover to a bad metal region. Near the Mott metal-insulator transition, this coherence temperature Tcoh is much lower than the Fermi temperature of the uncorrelated Fermi gas, as is observed in a broad range of strongly correlated electron materials. After a proper rescaling of temperature and interaction, we find a universal behavior that is independent of the band structure of the system. We obtain the temperature-interaction phase diagram as function of doping, and we compare the temperature dependence of the double occupancy, entropy, and charge compressibility with previous results obtained with dynamical mean-field theory. We analyze the stability of the method by calculating the charge compressibility.
publishDate 2017
dc.date.none.fl_str_mv 2017-07
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/11336/185868
Mezio, Alejandro; McKenzie, Ross H.; Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 96; 3; 7-2017; 1-10
1098-0121
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/185868
identifier_str_mv Mezio, Alejandro; McKenzie, Ross H.; Low quasiparticle coherence temperature in the one-band Hubbard model: A slave-boson approach; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 96; 3; 7-2017; 1-10
1098-0121
2469-9969
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://link.aps.org/doi/10.1103/PhysRevB.96.035121
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.96.035121
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
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
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score 13.069144

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