Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes

Autores
Perez Daroca, Diego Raul; Roura Bas, Pablo Gines; Aligia, Armando Angel
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study a system composed of two quantum dots connected in series between two leads at different temperatures, in the limit of large intratomic repulsion. Using the non-crossing approximation, we calculate the spectral densities at both dots ρi(ω), the thermal and thermoelectric responses, thermopower and figure of merit in different regimes. The interatomic repulsion leads to finite heat transport even if the hopping between the dots t = 0. The thermopower can be very large compared to single-dot systems in several regimes. The changes in sign of the thermoelectric current can be understood from the position and magnitude of the Kondo and charge-transfer peaks in ρi(ω). The figure of merit can reach values near 0.7. The violation of the Wiedemann-Franz law is much more significant than in previously studied nanoscopic systems. An analysis of the widths of ρi(ω) indicates that the dots are at effective temperatures Ti intermediate between those of the two leads, which tend to be the same for large t.
Fil: Perez Daroca, Diego Raul. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Aligia, Armando Angel. Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología; Argentina. 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
Materia
Thermopower
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:11336/223613
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimesPerez Daroca, Diego RaulRoura Bas, Pablo GinesAligia, Armando AngelThermopowerhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study a system composed of two quantum dots connected in series between two leads at different temperatures, in the limit of large intratomic repulsion. Using the non-crossing approximation, we calculate the spectral densities at both dots ρi(ω), the thermal and thermoelectric responses, thermopower and figure of merit in different regimes. The interatomic repulsion leads to finite heat transport even if the hopping between the dots t = 0. The thermopower can be very large compared to single-dot systems in several regimes. The changes in sign of the thermoelectric current can be understood from the position and magnitude of the Kondo and charge-transfer peaks in ρi(ω). The figure of merit can reach values near 0.7. The violation of the Wiedemann-Franz law is much more significant than in previously studied nanoscopic systems. An analysis of the widths of ρi(ω) indicates that the dots are at effective temperatures Ti intermediate between those of the two leads, which tend to be the same for large t.Fil: Perez Daroca, Diego Raul. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Aligia, Armando Angel. Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología; Argentina. 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; ArgentinaAmerican Physical Society2023-10info: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/11336/223613Perez Daroca, Diego Raul; Roura Bas, Pablo Gines; Aligia, Armando Angel; Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes; American Physical Society; Physical Review B; 108; 15; 10-2023; 1-162469-9950CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.108.155117info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.108.155117info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2306.01519v2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:04Zoai:ri.conicet.gov.ar:11336/223613instacron: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 09:45:04.923CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
title Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
spellingShingle Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
Perez Daroca, Diego Raul
Thermopower
title_short Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
title_full Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
title_fullStr Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
title_full_unstemmed Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
title_sort Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
dc.creator.none.fl_str_mv Perez Daroca, Diego Raul
Roura Bas, Pablo Gines
Aligia, Armando Angel
author Perez Daroca, Diego Raul
author_facet Perez Daroca, Diego Raul
Roura Bas, Pablo Gines
Aligia, Armando Angel
author_role author
author2 Roura Bas, Pablo Gines
Aligia, Armando Angel
author2_role author
author
dc.subject.none.fl_str_mv Thermopower
topic Thermopower
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 a system composed of two quantum dots connected in series between two leads at different temperatures, in the limit of large intratomic repulsion. Using the non-crossing approximation, we calculate the spectral densities at both dots ρi(ω), the thermal and thermoelectric responses, thermopower and figure of merit in different regimes. The interatomic repulsion leads to finite heat transport even if the hopping between the dots t = 0. The thermopower can be very large compared to single-dot systems in several regimes. The changes in sign of the thermoelectric current can be understood from the position and magnitude of the Kondo and charge-transfer peaks in ρi(ω). The figure of merit can reach values near 0.7. The violation of the Wiedemann-Franz law is much more significant than in previously studied nanoscopic systems. An analysis of the widths of ρi(ω) indicates that the dots are at effective temperatures Ti intermediate between those of the two leads, which tend to be the same for large t.
Fil: Perez Daroca, Diego Raul. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Roura Bas, Pablo Gines. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Aligia, Armando Angel. Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología; Argentina. 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
description We study a system composed of two quantum dots connected in series between two leads at different temperatures, in the limit of large intratomic repulsion. Using the non-crossing approximation, we calculate the spectral densities at both dots ρi(ω), the thermal and thermoelectric responses, thermopower and figure of merit in different regimes. The interatomic repulsion leads to finite heat transport even if the hopping between the dots t = 0. The thermopower can be very large compared to single-dot systems in several regimes. The changes in sign of the thermoelectric current can be understood from the position and magnitude of the Kondo and charge-transfer peaks in ρi(ω). The figure of merit can reach values near 0.7. The violation of the Wiedemann-Franz law is much more significant than in previously studied nanoscopic systems. An analysis of the widths of ρi(ω) indicates that the dots are at effective temperatures Ti intermediate between those of the two leads, which tend to be the same for large t.
publishDate 2023
dc.date.none.fl_str_mv 2023-10
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/11336/223613
Perez Daroca, Diego Raul; Roura Bas, Pablo Gines; Aligia, Armando Angel; Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes; American Physical Society; Physical Review B; 108; 15; 10-2023; 1-16
2469-9950
CONICET Digital
CONICET
url http://hdl.handle.net/11336/223613
identifier_str_mv Perez Daroca, Diego Raul; Roura Bas, Pablo Gines; Aligia, Armando Angel; Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes; American Physical Society; Physical Review B; 108; 15; 10-2023; 1-16
2469-9950
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.108.155117
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.108.155117
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2306.01519v2
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 13.13397

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