Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin

Autores
Feinberg, D.; Balseiro, Carlos Antonio
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A Josephson bijunction made of three superconductors connected by a quantum dot is considered in the regime where the dot carries a magnetic moment. In the range of parameters where such a dot, if inserted in a two-terminal Josephson junction, creates a π -shift of the phase, the bijunction forming a triangular unit is frustrated. This frustration is studied within both a phenomenological and a microscopic model. Frustration stabilizes a phase vortex centered on the dot, with two degenerate states carrying opposite vorticities, independently of the direction of the magnetic moment. Embedding the bijunction in a superconducting loop allows one to create a tunable “ ϕ ”-junction whose equilibrium phase can take any value. For large enough inductance, it generates noninteger spontaneous flux. Multiloop configurations are also studied.
Fil: Feinberg, D.. Universite Grenoble; Francia
Fil: Balseiro, Carlos Antonio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Spuerconductivity
Josephson Junctions
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:11336/32915
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/32915
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network_name_str CONICET Digital (CONICET)
spelling Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spinFeinberg, D.Balseiro, Carlos AntonioSpuerconductivityJosephson Junctionshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A Josephson bijunction made of three superconductors connected by a quantum dot is considered in the regime where the dot carries a magnetic moment. In the range of parameters where such a dot, if inserted in a two-terminal Josephson junction, creates a π -shift of the phase, the bijunction forming a triangular unit is frustrated. This frustration is studied within both a phenomenological and a microscopic model. Frustration stabilizes a phase vortex centered on the dot, with two degenerate states carrying opposite vorticities, independently of the direction of the magnetic moment. Embedding the bijunction in a superconducting loop allows one to create a tunable “ ϕ ”-junction whose equilibrium phase can take any value. For large enough inductance, it generates noninteger spontaneous flux. Multiloop configurations are also studied.Fil: Feinberg, D.. Universite Grenoble; FranciaFil: Balseiro, Carlos Antonio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Physical Society2014-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/32915Feinberg, D.; Balseiro, Carlos Antonio; Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin; American Physical Society; Physical Review B; 90; 7; 8-2014; 1-7; 0754320163-1829CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.90.075432info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.075432info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:31:23Zoai:ri.conicet.gov.ar:11336/32915instacron: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 10:31:23.469CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
title Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
spellingShingle Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
Feinberg, D.
Spuerconductivity
Josephson Junctions
title_short Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
title_full Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
title_fullStr Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
title_full_unstemmed Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
title_sort Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin
dc.creator.none.fl_str_mv Feinberg, D.
Balseiro, Carlos Antonio
author Feinberg, D.
author_facet Feinberg, D.
Balseiro, Carlos Antonio
author_role author
author2 Balseiro, Carlos Antonio
author2_role author
dc.subject.none.fl_str_mv Spuerconductivity
Josephson Junctions
topic Spuerconductivity
Josephson Junctions
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 Josephson bijunction made of three superconductors connected by a quantum dot is considered in the regime where the dot carries a magnetic moment. In the range of parameters where such a dot, if inserted in a two-terminal Josephson junction, creates a π -shift of the phase, the bijunction forming a triangular unit is frustrated. This frustration is studied within both a phenomenological and a microscopic model. Frustration stabilizes a phase vortex centered on the dot, with two degenerate states carrying opposite vorticities, independently of the direction of the magnetic moment. Embedding the bijunction in a superconducting loop allows one to create a tunable “ ϕ ”-junction whose equilibrium phase can take any value. For large enough inductance, it generates noninteger spontaneous flux. Multiloop configurations are also studied.
Fil: Feinberg, D.. Universite Grenoble; Francia
Fil: Balseiro, Carlos Antonio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description A Josephson bijunction made of three superconductors connected by a quantum dot is considered in the regime where the dot carries a magnetic moment. In the range of parameters where such a dot, if inserted in a two-terminal Josephson junction, creates a π -shift of the phase, the bijunction forming a triangular unit is frustrated. This frustration is studied within both a phenomenological and a microscopic model. Frustration stabilizes a phase vortex centered on the dot, with two degenerate states carrying opposite vorticities, independently of the direction of the magnetic moment. Embedding the bijunction in a superconducting loop allows one to create a tunable “ ϕ ”-junction whose equilibrium phase can take any value. For large enough inductance, it generates noninteger spontaneous flux. Multiloop configurations are also studied.
publishDate 2014
dc.date.none.fl_str_mv 2014-08
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/11336/32915
Feinberg, D.; Balseiro, Carlos Antonio; Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin; American Physical Society; Physical Review B; 90; 7; 8-2014; 1-7; 075432
0163-1829
CONICET Digital
CONICET
url http://hdl.handle.net/11336/32915
identifier_str_mv Feinberg, D.; Balseiro, Carlos Antonio; Spontaneous vortex state and ϕ -junction in a superconducting bijunction with a localized spin; American Physical Society; Physical Review B; 90; 7; 8-2014; 1-7; 075432
0163-1829
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.90.075432
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.075432
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
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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