Emergent low-energy bound states in the two-orbital Hubbard model

Autores
Núñez Fernández, Yuriel; Kotliar, Gabriel; Hallberg, Karen Astrid
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A repulsive Coulomb interaction between electrons in different orbitals in correlated materials can give rise to bound quasiparticle states. We study the nonhybridized two-orbital Hubbard model with intra- (inter)orbital interaction U(U12) and different bandwidths using an improved dynamical mean-field theory numerical technique which leads to reliable spectra on the real energy axis directly at zero temperature. We find that a finite density of states at the Fermi energy in one band is correlated with the emergence of well-defined quasiparticle states at excited energies Δ=U-U12 in the other band. These excitations are interband holon-doublon bound states. At the symmetric point U=U12, the quasiparticle peaks are located at the Fermi energy, leading to a simultaneous and continuous Mott transition settling a long-standing controversy.
Fil: Núñez Fernández, Yuriel. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Kotliar, Gabriel. Brookhaven National Laboratory; Estados Unidos. Rutgers University; Estados Unidos
Fil: Hallberg, Karen Astrid. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Materia
Cuasiparticulas
Densidad de estados
Sistemas correlacionados
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/98303
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Emergent low-energy bound states in the two-orbital Hubbard modelNúñez Fernández, YurielKotliar, GabrielHallberg, Karen AstridCuasiparticulasDensidad de estadosSistemas correlacionadoshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A repulsive Coulomb interaction between electrons in different orbitals in correlated materials can give rise to bound quasiparticle states. We study the nonhybridized two-orbital Hubbard model with intra- (inter)orbital interaction U(U12) and different bandwidths using an improved dynamical mean-field theory numerical technique which leads to reliable spectra on the real energy axis directly at zero temperature. We find that a finite density of states at the Fermi energy in one band is correlated with the emergence of well-defined quasiparticle states at excited energies Δ=U-U12 in the other band. These excitations are interband holon-doublon bound states. At the symmetric point U=U12, the quasiparticle peaks are located at the Fermi energy, leading to a simultaneous and continuous Mott transition settling a long-standing controversy.Fil: Núñez Fernández, Yuriel. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Kotliar, Gabriel. Brookhaven National Laboratory; Estados Unidos. Rutgers University; Estados UnidosFil: Hallberg, Karen Astrid. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaAmerican Physical Society2018-03-30info: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/11336/98303Núñez Fernández, Yuriel; Kotliar, Gabriel; Hallberg, Karen Astrid; Emergent low-energy bound states in the two-orbital Hubbard model; American Physical Society; Physical Review B; 97; 12; 30-3-2018; 1-72469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.121113info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.97.121113info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1710.08792info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:32:10Zoai:ri.conicet.gov.ar:11336/98303instacron: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:34982025-10-22 11:32:10.388CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Emergent low-energy bound states in the two-orbital Hubbard model
title Emergent low-energy bound states in the two-orbital Hubbard model
spellingShingle Emergent low-energy bound states in the two-orbital Hubbard model
Núñez Fernández, Yuriel
Cuasiparticulas
Densidad de estados
Sistemas correlacionados
title_short Emergent low-energy bound states in the two-orbital Hubbard model
title_full Emergent low-energy bound states in the two-orbital Hubbard model
title_fullStr Emergent low-energy bound states in the two-orbital Hubbard model
title_full_unstemmed Emergent low-energy bound states in the two-orbital Hubbard model
title_sort Emergent low-energy bound states in the two-orbital Hubbard model
dc.creator.none.fl_str_mv Núñez Fernández, Yuriel
Kotliar, Gabriel
Hallberg, Karen Astrid
author Núñez Fernández, Yuriel
author_facet Núñez Fernández, Yuriel
Kotliar, Gabriel
Hallberg, Karen Astrid
author_role author
author2 Kotliar, Gabriel
Hallberg, Karen Astrid
author2_role author
author
dc.subject.none.fl_str_mv Cuasiparticulas
Densidad de estados
Sistemas correlacionados
topic Cuasiparticulas
Densidad de estados
Sistemas correlacionados
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A repulsive Coulomb interaction between electrons in different orbitals in correlated materials can give rise to bound quasiparticle states. We study the nonhybridized two-orbital Hubbard model with intra- (inter)orbital interaction U(U12) and different bandwidths using an improved dynamical mean-field theory numerical technique which leads to reliable spectra on the real energy axis directly at zero temperature. We find that a finite density of states at the Fermi energy in one band is correlated with the emergence of well-defined quasiparticle states at excited energies Δ=U-U12 in the other band. These excitations are interband holon-doublon bound states. At the symmetric point U=U12, the quasiparticle peaks are located at the Fermi energy, leading to a simultaneous and continuous Mott transition settling a long-standing controversy.
Fil: Núñez Fernández, Yuriel. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Kotliar, Gabriel. Brookhaven National Laboratory; Estados Unidos. Rutgers University; Estados Unidos
Fil: Hallberg, Karen Astrid. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
description A repulsive Coulomb interaction between electrons in different orbitals in correlated materials can give rise to bound quasiparticle states. We study the nonhybridized two-orbital Hubbard model with intra- (inter)orbital interaction U(U12) and different bandwidths using an improved dynamical mean-field theory numerical technique which leads to reliable spectra on the real energy axis directly at zero temperature. We find that a finite density of states at the Fermi energy in one band is correlated with the emergence of well-defined quasiparticle states at excited energies Δ=U-U12 in the other band. These excitations are interband holon-doublon bound states. At the symmetric point U=U12, the quasiparticle peaks are located at the Fermi energy, leading to a simultaneous and continuous Mott transition settling a long-standing controversy.
publishDate 2018
dc.date.none.fl_str_mv 2018-03-30
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/11336/98303
Núñez Fernández, Yuriel; Kotliar, Gabriel; Hallberg, Karen Astrid; Emergent low-energy bound states in the two-orbital Hubbard model; American Physical Society; Physical Review B; 97; 12; 30-3-2018; 1-7
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/98303
identifier_str_mv Núñez Fernández, Yuriel; Kotliar, Gabriel; Hallberg, Karen Astrid; Emergent low-energy bound states in the two-orbital Hubbard model; American Physical Society; Physical Review B; 97; 12; 30-3-2018; 1-7
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/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.121113
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.97.121113
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1710.08792
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/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
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score 12.982451

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