Orbital Kondo spectroscopy in a double quantum dot system

Autores
Tosi, Leandro; Roura Bas, Pablo Gines; Aligia, Armando Ángel
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We calculate the nonequilibrium conductance of a system of two capacitively coupled quantum dots, each one connected to its own pair of conducting leads. The system has been used recently to perform pseudospin spectroscopy by controlling independently the voltages of the four leads. The pseudospin is defined by the orbital occupation of one or the other dot. Starting from the SU(4) symmetric point of spin and pseudospin degeneracy in the Kondo regime, for an odd number of electrons in the system, we show how the conductance through each dot varies as the symmetry is reduced to SU(2) by a pseudo-Zeeman splitting, and as bias voltages are applied to any of the dots. We analyze the expected behavior of the system in general, and predict characteristic fingerprint features of the SU(4) → SU(2) crossover that have not been observed so far.
Fil: Tosi, Leandro. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Aligia, Armando Ángel. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Orbital Kondo
Spectroscopy
Quantum dots
Bias voltage
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:11336/21172
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Orbital Kondo spectroscopy in a double quantum dot systemTosi, LeandroRoura Bas, Pablo GinesAligia, Armando ÁngelOrbital KondoSpectroscopyQuantum dotsBias voltagehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We calculate the nonequilibrium conductance of a system of two capacitively coupled quantum dots, each one connected to its own pair of conducting leads. The system has been used recently to perform pseudospin spectroscopy by controlling independently the voltages of the four leads. The pseudospin is defined by the orbital occupation of one or the other dot. Starting from the SU(4) symmetric point of spin and pseudospin degeneracy in the Kondo regime, for an odd number of electrons in the system, we show how the conductance through each dot varies as the symmetry is reduced to SU(2) by a pseudo-Zeeman splitting, and as bias voltages are applied to any of the dots. We analyze the expected behavior of the system in general, and predict characteristic fingerprint features of the SU(4) → SU(2) crossover that have not been observed so far.Fil: Tosi, Leandro. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Aligia, Armando Ángel. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Physical Society2013-12info: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/11336/21172Tosi, Leandro; Roura Bas, Pablo Gines; Aligia, Armando Ángel; Orbital Kondo spectroscopy in a double quantum dot system; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 88; 23; 12-2013; 1-51098-0121CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.235427info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.88.235427info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1309.4642info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:36Zoai:ri.conicet.gov.ar:11336/21172instacron: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:34982025-09-03 09:54:36.354CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Orbital Kondo spectroscopy in a double quantum dot system
title Orbital Kondo spectroscopy in a double quantum dot system
spellingShingle Orbital Kondo spectroscopy in a double quantum dot system
Tosi, Leandro
Orbital Kondo
Spectroscopy
Quantum dots
Bias voltage
title_short Orbital Kondo spectroscopy in a double quantum dot system
title_full Orbital Kondo spectroscopy in a double quantum dot system
title_fullStr Orbital Kondo spectroscopy in a double quantum dot system
title_full_unstemmed Orbital Kondo spectroscopy in a double quantum dot system
title_sort Orbital Kondo spectroscopy in a double quantum dot system
dc.creator.none.fl_str_mv Tosi, Leandro
Roura Bas, Pablo Gines
Aligia, Armando Ángel
author Tosi, Leandro
author_facet Tosi, Leandro
Roura Bas, Pablo Gines
Aligia, Armando Ángel
author_role author
author2 Roura Bas, Pablo Gines
Aligia, Armando Ángel
author2_role author
author
dc.subject.none.fl_str_mv Orbital Kondo
Spectroscopy
Quantum dots
Bias voltage
topic Orbital Kondo
Spectroscopy
Quantum dots
Bias voltage
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 nonequilibrium conductance of a system of two capacitively coupled quantum dots, each one connected to its own pair of conducting leads. The system has been used recently to perform pseudospin spectroscopy by controlling independently the voltages of the four leads. The pseudospin is defined by the orbital occupation of one or the other dot. Starting from the SU(4) symmetric point of spin and pseudospin degeneracy in the Kondo regime, for an odd number of electrons in the system, we show how the conductance through each dot varies as the symmetry is reduced to SU(2) by a pseudo-Zeeman splitting, and as bias voltages are applied to any of the dots. We analyze the expected behavior of the system in general, and predict characteristic fingerprint features of the SU(4) → SU(2) crossover that have not been observed so far.
Fil: Tosi, Leandro. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Aligia, Armando Ángel. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description We calculate the nonequilibrium conductance of a system of two capacitively coupled quantum dots, each one connected to its own pair of conducting leads. The system has been used recently to perform pseudospin spectroscopy by controlling independently the voltages of the four leads. The pseudospin is defined by the orbital occupation of one or the other dot. Starting from the SU(4) symmetric point of spin and pseudospin degeneracy in the Kondo regime, for an odd number of electrons in the system, we show how the conductance through each dot varies as the symmetry is reduced to SU(2) by a pseudo-Zeeman splitting, and as bias voltages are applied to any of the dots. We analyze the expected behavior of the system in general, and predict characteristic fingerprint features of the SU(4) → SU(2) crossover that have not been observed so far.
publishDate 2013
dc.date.none.fl_str_mv 2013-12
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/11336/21172
Tosi, Leandro; Roura Bas, Pablo Gines; Aligia, Armando Ángel; Orbital Kondo spectroscopy in a double quantum dot system; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 88; 23; 12-2013; 1-5
1098-0121
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21172
identifier_str_mv Tosi, Leandro; Roura Bas, Pablo Gines; Aligia, Armando Ángel; Orbital Kondo spectroscopy in a double quantum dot system; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 88; 23; 12-2013; 1-5
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/abstract/10.1103/PhysRevB.88.235427
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.88.235427
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1309.4642
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 13.13397

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