Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads

Autores
Di Napoli, Solange Mariel; Roura Bas, Pablo Gines; Weichselbaum, Andreas; Aligia, Armando Ángel
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We calculate the differential conductance as a function of temperature and bias voltage, G(T ,V ), through Au monatomic chains with a substitutional Co atom as a magnetic impurity, connected to a fourfold symmetric lead. The system was recently proposed as a possible scenario for observation of the overscreened Kondo physics. Stretching the chain, the system could be tuned through a quantum critical point (QCP) with three different regimes: overscreened, underscreened, and non-Kondo phases. We present calculations of the impurity spectral function by using the numerical renormalization group for the three different regimes characterizing the QCP. Nontrivial behavior of the spectral function is reported near the QCP. Comparison with results using the noncrossing approximation (NCA) shows that the latter is reliable in the overscreened regime, when the anisotropy is larger than the Kondo temperature. For these parameters, which correspond to realistic previous estimates, G(T,V) calculated within NCA exhibits clear signatures of the non-Fermi-liquid behavior within the overscreened regime.
Fil: Di Napoli, Solange Mariel. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Roura Bas, Pablo Gines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina
Fil: Weichselbaum, Andreas. Technische Universitat Munchen; Alemania. Ludwig-Maximilians-Universität Munchen; Alemania
Fil: Aligia, Armando Ángel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Materia
KONDO PHYSICS
NON-EQUILIBRIUM TRANSPORT
NCA
NRG
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:11336/32854
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leadsDi Napoli, Solange MarielRoura Bas, Pablo GinesWeichselbaum, AndreasAligia, Armando ÁngelKONDO PHYSICSNON-EQUILIBRIUM TRANSPORTNCANRGhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We calculate the differential conductance as a function of temperature and bias voltage, G(T ,V ), through Au monatomic chains with a substitutional Co atom as a magnetic impurity, connected to a fourfold symmetric lead. The system was recently proposed as a possible scenario for observation of the overscreened Kondo physics. Stretching the chain, the system could be tuned through a quantum critical point (QCP) with three different regimes: overscreened, underscreened, and non-Kondo phases. We present calculations of the impurity spectral function by using the numerical renormalization group for the three different regimes characterizing the QCP. Nontrivial behavior of the spectral function is reported near the QCP. Comparison with results using the noncrossing approximation (NCA) shows that the latter is reliable in the overscreened regime, when the anisotropy is larger than the Kondo temperature. For these parameters, which correspond to realistic previous estimates, G(T,V) calculated within NCA exhibits clear signatures of the non-Fermi-liquid behavior within the overscreened regime.Fil: Di Napoli, Solange Mariel. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Roura Bas, Pablo Gines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; ArgentinaFil: Weichselbaum, Andreas. Technische Universitat Munchen; Alemania. Ludwig-Maximilians-Universität Munchen; AlemaniaFil: Aligia, Armando Ángel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaAmerican Physical Society2014-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/32854Di Napoli, Solange Mariel; Weichselbaum, Andreas; Roura Bas, Pablo Gines; Aligia, Armando Ángel; Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 90; 12; 9-2014; 1251491098-0121CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prb/pdf/10.1103/PhysRevB.90.125149info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.90.125149info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1405.1011info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:31:46Zoai:ri.conicet.gov.ar:11336/32854instacron: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:34982025-10-15 14:31:46.818CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
title Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
spellingShingle Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
Di Napoli, Solange Mariel
KONDO PHYSICS
NON-EQUILIBRIUM TRANSPORT
NCA
NRG
title_short Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
title_full Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
title_fullStr Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
title_full_unstemmed Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
title_sort Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads
dc.creator.none.fl_str_mv Di Napoli, Solange Mariel
Roura Bas, Pablo Gines
Weichselbaum, Andreas
Aligia, Armando Ángel
author Di Napoli, Solange Mariel
author_facet Di Napoli, Solange Mariel
Roura Bas, Pablo Gines
Weichselbaum, Andreas
Aligia, Armando Ángel
author_role author
author2 Roura Bas, Pablo Gines
Weichselbaum, Andreas
Aligia, Armando Ángel
author2_role author
author
author
dc.subject.none.fl_str_mv KONDO PHYSICS
NON-EQUILIBRIUM TRANSPORT
NCA
NRG
topic KONDO PHYSICS
NON-EQUILIBRIUM TRANSPORT
NCA
NRG
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 calculate the differential conductance as a function of temperature and bias voltage, G(T ,V ), through Au monatomic chains with a substitutional Co atom as a magnetic impurity, connected to a fourfold symmetric lead. The system was recently proposed as a possible scenario for observation of the overscreened Kondo physics. Stretching the chain, the system could be tuned through a quantum critical point (QCP) with three different regimes: overscreened, underscreened, and non-Kondo phases. We present calculations of the impurity spectral function by using the numerical renormalization group for the three different regimes characterizing the QCP. Nontrivial behavior of the spectral function is reported near the QCP. Comparison with results using the noncrossing approximation (NCA) shows that the latter is reliable in the overscreened regime, when the anisotropy is larger than the Kondo temperature. For these parameters, which correspond to realistic previous estimates, G(T,V) calculated within NCA exhibits clear signatures of the non-Fermi-liquid behavior within the overscreened regime.
Fil: Di Napoli, Solange Mariel. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Roura Bas, Pablo Gines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina
Fil: Weichselbaum, Andreas. Technische Universitat Munchen; Alemania. Ludwig-Maximilians-Universität Munchen; Alemania
Fil: Aligia, Armando Ángel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
description We calculate the differential conductance as a function of temperature and bias voltage, G(T ,V ), through Au monatomic chains with a substitutional Co atom as a magnetic impurity, connected to a fourfold symmetric lead. The system was recently proposed as a possible scenario for observation of the overscreened Kondo physics. Stretching the chain, the system could be tuned through a quantum critical point (QCP) with three different regimes: overscreened, underscreened, and non-Kondo phases. We present calculations of the impurity spectral function by using the numerical renormalization group for the three different regimes characterizing the QCP. Nontrivial behavior of the spectral function is reported near the QCP. Comparison with results using the noncrossing approximation (NCA) shows that the latter is reliable in the overscreened regime, when the anisotropy is larger than the Kondo temperature. For these parameters, which correspond to realistic previous estimates, G(T,V) calculated within NCA exhibits clear signatures of the non-Fermi-liquid behavior within the overscreened regime.
publishDate 2014
dc.date.none.fl_str_mv 2014-09
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/11336/32854
Di Napoli, Solange Mariel; Weichselbaum, Andreas; Roura Bas, Pablo Gines; Aligia, Armando Ángel; Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 90; 12; 9-2014; 125149
1098-0121
CONICET Digital
CONICET
url http://hdl.handle.net/11336/32854
identifier_str_mv Di Napoli, Solange Mariel; Weichselbaum, Andreas; Roura Bas, Pablo Gines; Aligia, Armando Ángel; Non-Fermi-liquid behavior in nonequilibrium transport through Co-doped Au chains connected to fourfold symmetric leads; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 90; 12; 9-2014; 125149
1098-0121
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://journals.aps.org/prb/pdf/10.1103/PhysRevB.90.125149
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.90.125149
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1405.1011
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
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_ 1846082803232407552
score 12.891075

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