Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities

Autores
Andrade, J. A.; Lobos, Alejandro Martin
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We theoretically consider a quantum magnetic impurity coupled to a superconductor, and obtain the local density of states at the position of the impurity taking into account the effect of spinfluctuations and single-ion magnetic anisotropy. We particularly focus on the spectrum of subgap Yu-Shiba-Rusinov (YSR or Shiba) states induced by a quantum impurity with easy- or hard-axis uniaxial anisotropy. Although this is a relevant experimental situation in, e.g., magnetic adatoms on the surface of clean metals, it is customary that theoretical descriptions assume a classical-spin approximation which is not able to account for single-ion anisotropy and other quantum effects. Here, quantum fluctuations of the spin are taken into account in the equations of motion of the electronic Green’s function in the weak-coupling limit, and considerably modify the energy of the Shiba states compared to the classical-spin approximation. Our results point towards the importance of incorporating quantum fluctuations and anisotropy effects for the correct interpretation of scanning tunneling microscopy (STM) experiments.
Fil: Andrade, J. A.. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lobos, Alejandro Martin. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
MAGNETIC IMPURITIES IN SUPERCONDUCTORS
QUANTUM FLUCTUATION EFFECTS IN MAGNETISM
SHIBA STATES
SINGLE-ION ANISOTROPY
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:11336/124623
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/124623
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impuritiesAndrade, J. A.Lobos, Alejandro MartinMAGNETIC IMPURITIES IN SUPERCONDUCTORSQUANTUM FLUCTUATION EFFECTS IN MAGNETISMSHIBA STATESSINGLE-ION ANISOTROPYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We theoretically consider a quantum magnetic impurity coupled to a superconductor, and obtain the local density of states at the position of the impurity taking into account the effect of spinfluctuations and single-ion magnetic anisotropy. We particularly focus on the spectrum of subgap Yu-Shiba-Rusinov (YSR or Shiba) states induced by a quantum impurity with easy- or hard-axis uniaxial anisotropy. Although this is a relevant experimental situation in, e.g., magnetic adatoms on the surface of clean metals, it is customary that theoretical descriptions assume a classical-spin approximation which is not able to account for single-ion anisotropy and other quantum effects. Here, quantum fluctuations of the spin are taken into account in the equations of motion of the electronic Green’s function in the weak-coupling limit, and considerably modify the energy of the Shiba states compared to the classical-spin approximation. Our results point towards the importance of incorporating quantum fluctuations and anisotropy effects for the correct interpretation of scanning tunneling microscopy (STM) experiments.Fil: Andrade, J. A.. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lobos, Alejandro Martin. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Physical Society2019-02-15info: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/11336/124623Andrade, J. A.; Lobos, Alejandro Martin; Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities; American Physical Society; Physical Review B; 99; 5; 15-2-2019; 1-132469-99502469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevB.99.054508info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.99.054508info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:41:02Zoai:ri.conicet.gov.ar:11336/124623instacron: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 09:41:02.888CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
title Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
spellingShingle Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
Andrade, J. A.
MAGNETIC IMPURITIES IN SUPERCONDUCTORS
QUANTUM FLUCTUATION EFFECTS IN MAGNETISM
SHIBA STATES
SINGLE-ION ANISOTROPY
title_short Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
title_full Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
title_fullStr Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
title_full_unstemmed Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
title_sort Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities
dc.creator.none.fl_str_mv Andrade, J. A.
Lobos, Alejandro Martin
author Andrade, J. A.
author_facet Andrade, J. A.
Lobos, Alejandro Martin
author_role author
author2 Lobos, Alejandro Martin
author2_role author
dc.subject.none.fl_str_mv MAGNETIC IMPURITIES IN SUPERCONDUCTORS
QUANTUM FLUCTUATION EFFECTS IN MAGNETISM
SHIBA STATES
SINGLE-ION ANISOTROPY
topic MAGNETIC IMPURITIES IN SUPERCONDUCTORS
QUANTUM FLUCTUATION EFFECTS IN MAGNETISM
SHIBA STATES
SINGLE-ION ANISOTROPY
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 theoretically consider a quantum magnetic impurity coupled to a superconductor, and obtain the local density of states at the position of the impurity taking into account the effect of spinfluctuations and single-ion magnetic anisotropy. We particularly focus on the spectrum of subgap Yu-Shiba-Rusinov (YSR or Shiba) states induced by a quantum impurity with easy- or hard-axis uniaxial anisotropy. Although this is a relevant experimental situation in, e.g., magnetic adatoms on the surface of clean metals, it is customary that theoretical descriptions assume a classical-spin approximation which is not able to account for single-ion anisotropy and other quantum effects. Here, quantum fluctuations of the spin are taken into account in the equations of motion of the electronic Green’s function in the weak-coupling limit, and considerably modify the energy of the Shiba states compared to the classical-spin approximation. Our results point towards the importance of incorporating quantum fluctuations and anisotropy effects for the correct interpretation of scanning tunneling microscopy (STM) experiments.
Fil: Andrade, J. A.. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lobos, Alejandro Martin. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description We theoretically consider a quantum magnetic impurity coupled to a superconductor, and obtain the local density of states at the position of the impurity taking into account the effect of spinfluctuations and single-ion magnetic anisotropy. We particularly focus on the spectrum of subgap Yu-Shiba-Rusinov (YSR or Shiba) states induced by a quantum impurity with easy- or hard-axis uniaxial anisotropy. Although this is a relevant experimental situation in, e.g., magnetic adatoms on the surface of clean metals, it is customary that theoretical descriptions assume a classical-spin approximation which is not able to account for single-ion anisotropy and other quantum effects. Here, quantum fluctuations of the spin are taken into account in the equations of motion of the electronic Green’s function in the weak-coupling limit, and considerably modify the energy of the Shiba states compared to the classical-spin approximation. Our results point towards the importance of incorporating quantum fluctuations and anisotropy effects for the correct interpretation of scanning tunneling microscopy (STM) experiments.
publishDate 2019
dc.date.none.fl_str_mv 2019-02-15
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/11336/124623
Andrade, J. A.; Lobos, Alejandro Martin; Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities; American Physical Society; Physical Review B; 99; 5; 15-2-2019; 1-13
2469-9950
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/124623
identifier_str_mv Andrade, J. A.; Lobos, Alejandro Martin; Anisotropy and spin-fluctuation effects on the spectral properties of Shiba impurities; American Physical Society; Physical Review B; 99; 5; 15-2-2019; 1-13
2469-9950
2469-9969
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://link.aps.org/doi/10.1103/PhysRevB.99.054508
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.99.054508
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 13.070432

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