Quantum phase diagram of Shiba impurities from bosonization

Autores
Bortolin, Tomás Sebastián; Iucci, Carlos Aníbal; Lobos, Alejandro M.
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A characteristic feature of magnetic impurities in superconductors is the existence of a spin- and paritychanging quantum phase transition (known as “0-π” transition) which has been observed in scanning tunneling microscopy (STM) and quantum transport experiments. Using the Abelian bosonization technique, here we analyze the ground-state properties and the quantum phase diagram of an artificial “Shiba impurity” in a onedimensional superconductor. Within the bosonization framework, the ground-state properties are determined by simple solitonlike solutions of the classical equations of motion of the bosonic fields, whose topological charge is related to the spin and fermion-parity quantum numbers. Interestingly, the same theoretical framework can be used in the case of a bulk superconductor, where previous results can be rederived in an elegant fashion. Our results indicate that the quantum phase diagram of a magnetic impurity in the superconductor can be strongly affected by geometrical and dimensional effects. Exploiting this fact, in the one-dimensional case we propose an experimental superconducting setup in which a novel parity-preserving, spin-changing “0-0” transition is predicted.
Instituto de Física La Plata
Materia
Física
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/143855

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network_name_str SEDICI (UNLP)
spelling Quantum phase diagram of Shiba impurities from bosonizationBortolin, Tomás SebastiánIucci, Carlos AníbalLobos, Alejandro M.FísicaA characteristic feature of magnetic impurities in superconductors is the existence of a spin- and paritychanging quantum phase transition (known as “0-π” transition) which has been observed in scanning tunneling microscopy (STM) and quantum transport experiments. Using the Abelian bosonization technique, here we analyze the ground-state properties and the quantum phase diagram of an artificial “Shiba impurity” in a onedimensional superconductor. Within the bosonization framework, the ground-state properties are determined by simple solitonlike solutions of the classical equations of motion of the bosonic fields, whose topological charge is related to the spin and fermion-parity quantum numbers. Interestingly, the same theoretical framework can be used in the case of a bulk superconductor, where previous results can be rederived in an elegant fashion. Our results indicate that the quantum phase diagram of a magnetic impurity in the superconductor can be strongly affected by geometrical and dimensional effects. Exploiting this fact, in the one-dimensional case we propose an experimental superconducting setup in which a novel parity-preserving, spin-changing “0-0” transition is predicted.Instituto de Física La Plata2019-10-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/143855enginfo:eu-repo/semantics/altIdentifier/issn/2469-9950info:eu-repo/semantics/altIdentifier/issn/2469-9969info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.100.155111info:eu-repo/semantics/altIdentifier/arxiv/1904.02834info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:27Zoai:sedici.unlp.edu.ar:10915/143855Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:28.165SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Quantum phase diagram of Shiba impurities from bosonization
title Quantum phase diagram of Shiba impurities from bosonization
spellingShingle Quantum phase diagram of Shiba impurities from bosonization
Bortolin, Tomás Sebastián
Física
title_short Quantum phase diagram of Shiba impurities from bosonization
title_full Quantum phase diagram of Shiba impurities from bosonization
title_fullStr Quantum phase diagram of Shiba impurities from bosonization
title_full_unstemmed Quantum phase diagram of Shiba impurities from bosonization
title_sort Quantum phase diagram of Shiba impurities from bosonization
dc.creator.none.fl_str_mv Bortolin, Tomás Sebastián
Iucci, Carlos Aníbal
Lobos, Alejandro M.
author Bortolin, Tomás Sebastián
author_facet Bortolin, Tomás Sebastián
Iucci, Carlos Aníbal
Lobos, Alejandro M.
author_role author
author2 Iucci, Carlos Aníbal
Lobos, Alejandro M.
author2_role author
author
dc.subject.none.fl_str_mv Física
topic Física
dc.description.none.fl_txt_mv A characteristic feature of magnetic impurities in superconductors is the existence of a spin- and paritychanging quantum phase transition (known as “0-π” transition) which has been observed in scanning tunneling microscopy (STM) and quantum transport experiments. Using the Abelian bosonization technique, here we analyze the ground-state properties and the quantum phase diagram of an artificial “Shiba impurity” in a onedimensional superconductor. Within the bosonization framework, the ground-state properties are determined by simple solitonlike solutions of the classical equations of motion of the bosonic fields, whose topological charge is related to the spin and fermion-parity quantum numbers. Interestingly, the same theoretical framework can be used in the case of a bulk superconductor, where previous results can be rederived in an elegant fashion. Our results indicate that the quantum phase diagram of a magnetic impurity in the superconductor can be strongly affected by geometrical and dimensional effects. Exploiting this fact, in the one-dimensional case we propose an experimental superconducting setup in which a novel parity-preserving, spin-changing “0-0” transition is predicted.
Instituto de Física La Plata
description A characteristic feature of magnetic impurities in superconductors is the existence of a spin- and paritychanging quantum phase transition (known as “0-π” transition) which has been observed in scanning tunneling microscopy (STM) and quantum transport experiments. Using the Abelian bosonization technique, here we analyze the ground-state properties and the quantum phase diagram of an artificial “Shiba impurity” in a onedimensional superconductor. Within the bosonization framework, the ground-state properties are determined by simple solitonlike solutions of the classical equations of motion of the bosonic fields, whose topological charge is related to the spin and fermion-parity quantum numbers. Interestingly, the same theoretical framework can be used in the case of a bulk superconductor, where previous results can be rederived in an elegant fashion. Our results indicate that the quantum phase diagram of a magnetic impurity in the superconductor can be strongly affected by geometrical and dimensional effects. Exploiting this fact, in the one-dimensional case we propose an experimental superconducting setup in which a novel parity-preserving, spin-changing “0-0” transition is predicted.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/143855
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dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2469-9950
info:eu-repo/semantics/altIdentifier/issn/2469-9969
info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevb.100.155111
info:eu-repo/semantics/altIdentifier/arxiv/1904.02834
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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