Fully compensated Kondo effect for a two-channel spin S=1 impurity

Autores
Blesio, Germán Gabriel; Manuel, Luis Oscar; Aligia, Armando Angel; Roura Bas, Pablo Gines
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study the low-temperature properties of the generalized Anderson impurity model in which two localized configurations, one with two doublets and the other with a triplet, are mixed by two degenerate conduction channels. By using the numerical renormalization group and the noncrossing approximation, we analyze the impurity entropy, its spectral density, and the equilibrium conductance for several values of the model parameters. Marked differences with respect to the conventional one-channel spin s=1/2 Anderson model, which can be traced as hallmarks of an impurity spin S=1, are found in the Kondo temperature, the width and position of the charge-transfer peak, and the temperature dependence of the equilibrium conductance. Furthermore, we analyze the rich effects of a single-ion magnetic anisotropy D on the Kondo behavior. In particular, as shown before, for large enough positive D the system behaves as a "non-Landau" Fermi liquid that cannot be adiabatically connected to a noninteracting system turning off the interactions. For negative D the Kondo effect is strongly suppressed. While the model is suitable for the description of a single Ni impurity embedded in an O-doped Au chain, it is a generic one for S=1 and two channels and might be realized in other nanoscopic systems.
Fil: Blesio, Germán Gabriel. 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
Fil: Manuel, Luis Oscar. 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
Fil: Aligia, Armando Angel. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Materia
Kondo
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:11336/125137
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/125137
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Fully compensated Kondo effect for a two-channel spin S=1 impurityBlesio, Germán GabrielManuel, Luis OscarAligia, Armando AngelRoura Bas, Pablo GinesKondohttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study the low-temperature properties of the generalized Anderson impurity model in which two localized configurations, one with two doublets and the other with a triplet, are mixed by two degenerate conduction channels. By using the numerical renormalization group and the noncrossing approximation, we analyze the impurity entropy, its spectral density, and the equilibrium conductance for several values of the model parameters. Marked differences with respect to the conventional one-channel spin s=1/2 Anderson model, which can be traced as hallmarks of an impurity spin S=1, are found in the Kondo temperature, the width and position of the charge-transfer peak, and the temperature dependence of the equilibrium conductance. Furthermore, we analyze the rich effects of a single-ion magnetic anisotropy D on the Kondo behavior. In particular, as shown before, for large enough positive D the system behaves as a "non-Landau" Fermi liquid that cannot be adiabatically connected to a noninteracting system turning off the interactions. For negative D the Kondo effect is strongly suppressed. While the model is suitable for the description of a single Ni impurity embedded in an O-doped Au chain, it is a generic one for S=1 and two channels and might be realized in other nanoscopic systems.Fil: Blesio, Germán Gabriel. 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; ArgentinaFil: Manuel, Luis Oscar. 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; ArgentinaFil: Aligia, Armando Angel. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaAmerican Physical Society2019-08-26info: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/11336/125137Blesio, Germán Gabriel; Manuel, Luis Oscar; Aligia, Armando Angel; Roura Bas, Pablo Gines; Fully compensated Kondo effect for a two-channel spin S=1 impurity; American Physical Society; Physical Review B; 100; 7; 26-8-2019; 1-142469-99502469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevB.100.075434info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.100.075434info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1906.06799info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:57:42Zoai:ri.conicet.gov.ar:11336/125137instacron: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 09:57:42.796CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Fully compensated Kondo effect for a two-channel spin S=1 impurity
title Fully compensated Kondo effect for a two-channel spin S=1 impurity
spellingShingle Fully compensated Kondo effect for a two-channel spin S=1 impurity
Blesio, Germán Gabriel
Kondo
title_short Fully compensated Kondo effect for a two-channel spin S=1 impurity
title_full Fully compensated Kondo effect for a two-channel spin S=1 impurity
title_fullStr Fully compensated Kondo effect for a two-channel spin S=1 impurity
title_full_unstemmed Fully compensated Kondo effect for a two-channel spin S=1 impurity
title_sort Fully compensated Kondo effect for a two-channel spin S=1 impurity
dc.creator.none.fl_str_mv Blesio, Germán Gabriel
Manuel, Luis Oscar
Aligia, Armando Angel
Roura Bas, Pablo Gines
author Blesio, Germán Gabriel
author_facet Blesio, Germán Gabriel
Manuel, Luis Oscar
Aligia, Armando Angel
Roura Bas, Pablo Gines
author_role author
author2 Manuel, Luis Oscar
Aligia, Armando Angel
Roura Bas, Pablo Gines
author2_role author
author
author
dc.subject.none.fl_str_mv Kondo
topic Kondo
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 study the low-temperature properties of the generalized Anderson impurity model in which two localized configurations, one with two doublets and the other with a triplet, are mixed by two degenerate conduction channels. By using the numerical renormalization group and the noncrossing approximation, we analyze the impurity entropy, its spectral density, and the equilibrium conductance for several values of the model parameters. Marked differences with respect to the conventional one-channel spin s=1/2 Anderson model, which can be traced as hallmarks of an impurity spin S=1, are found in the Kondo temperature, the width and position of the charge-transfer peak, and the temperature dependence of the equilibrium conductance. Furthermore, we analyze the rich effects of a single-ion magnetic anisotropy D on the Kondo behavior. In particular, as shown before, for large enough positive D the system behaves as a "non-Landau" Fermi liquid that cannot be adiabatically connected to a noninteracting system turning off the interactions. For negative D the Kondo effect is strongly suppressed. While the model is suitable for the description of a single Ni impurity embedded in an O-doped Au chain, it is a generic one for S=1 and two channels and might be realized in other nanoscopic systems.
Fil: Blesio, Germán Gabriel. 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
Fil: Manuel, Luis Oscar. 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
Fil: Aligia, Armando Angel. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
description We study the low-temperature properties of the generalized Anderson impurity model in which two localized configurations, one with two doublets and the other with a triplet, are mixed by two degenerate conduction channels. By using the numerical renormalization group and the noncrossing approximation, we analyze the impurity entropy, its spectral density, and the equilibrium conductance for several values of the model parameters. Marked differences with respect to the conventional one-channel spin s=1/2 Anderson model, which can be traced as hallmarks of an impurity spin S=1, are found in the Kondo temperature, the width and position of the charge-transfer peak, and the temperature dependence of the equilibrium conductance. Furthermore, we analyze the rich effects of a single-ion magnetic anisotropy D on the Kondo behavior. In particular, as shown before, for large enough positive D the system behaves as a "non-Landau" Fermi liquid that cannot be adiabatically connected to a noninteracting system turning off the interactions. For negative D the Kondo effect is strongly suppressed. While the model is suitable for the description of a single Ni impurity embedded in an O-doped Au chain, it is a generic one for S=1 and two channels and might be realized in other nanoscopic systems.
publishDate 2019
dc.date.none.fl_str_mv 2019-08-26
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/11336/125137
Blesio, Germán Gabriel; Manuel, Luis Oscar; Aligia, Armando Angel; Roura Bas, Pablo Gines; Fully compensated Kondo effect for a two-channel spin S=1 impurity; American Physical Society; Physical Review B; 100; 7; 26-8-2019; 1-14
2469-9950
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/125137
identifier_str_mv Blesio, Germán Gabriel; Manuel, Luis Oscar; Aligia, Armando Angel; Roura Bas, Pablo Gines; Fully compensated Kondo effect for a two-channel spin S=1 impurity; American Physical Society; Physical Review B; 100; 7; 26-8-2019; 1-14
2469-9950
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://link.aps.org/doi/10.1103/PhysRevB.100.075434
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.100.075434
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1906.06799
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
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score 13.070432

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