Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures

Autores
Feijoo, Javier; Iucci, Carlos Aníbal; Lobos, Alejandro Martin
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We theoretically study the spectral properties of a one dimensional semiconductor-superconductor-ferromagnetic insulator (SE-SU-FMI) hybrid nanostructure, motivated by recent experiments where such devices have been fabricated using epitaxial growing techniques. We model the hybrid structure as a one-dimensional single-channel semiconductor nanowire under the simultaneous effect of two proximity-induced interactions: superconducting pairing and a (spatially inhomogeneous) Zeeman exchange field. The coexistence of these competing mechanisms generates a rich quantum phase diagram and a complex subgap Andreev bound state (ABS) spectrum. By exploiting the symmetries of the problem, we classify the solutions of the Bogoliubov-de Gennes equations into even and odd ABS with respect to the spatial inversion symmetry x → −x. We find the ABS spectrum of the device as a function of the different parameters of the model: the length L of the coexisting SU-FMI region, the induced Zeeman exchange field h0, and the induced superconducting coherence length ξ . In particular we analyze the evolution of the subgap spectrum as a function of the length L. Interestingly, we generically find spin-polarized ABS emerging in the subgap region, which, depending on the ratio h0/, can eventually cross below the Fermi energy at certain critical values Lc, and induce spin- and fermion paritychanging quantum phase transitions. We argue that this type of device constitute a promising highly-tunableplatform to engineer subgap ABS.
Fil: Feijoo, Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Iucci, Carlos Aníbal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Lobos, Alejandro Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina
Materia
ESTADOS LIGADOS DE ANDREEV
HETEROESTRUCTURAS HÍBRIDAS
SUPERCONDUCTORES TOPOLOGICOS
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:11336/230519
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/230519
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructuresFeijoo, JavierIucci, Carlos AníbalLobos, Alejandro MartinESTADOS LIGADOS DE ANDREEVHETEROESTRUCTURAS HÍBRIDASSUPERCONDUCTORES TOPOLOGICOShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We theoretically study the spectral properties of a one dimensional semiconductor-superconductor-ferromagnetic insulator (SE-SU-FMI) hybrid nanostructure, motivated by recent experiments where such devices have been fabricated using epitaxial growing techniques. We model the hybrid structure as a one-dimensional single-channel semiconductor nanowire under the simultaneous effect of two proximity-induced interactions: superconducting pairing and a (spatially inhomogeneous) Zeeman exchange field. The coexistence of these competing mechanisms generates a rich quantum phase diagram and a complex subgap Andreev bound state (ABS) spectrum. By exploiting the symmetries of the problem, we classify the solutions of the Bogoliubov-de Gennes equations into even and odd ABS with respect to the spatial inversion symmetry x → −x. We find the ABS spectrum of the device as a function of the different parameters of the model: the length L of the coexisting SU-FMI region, the induced Zeeman exchange field h0, and the induced superconducting coherence length ξ . In particular we analyze the evolution of the subgap spectrum as a function of the length L. Interestingly, we generically find spin-polarized ABS emerging in the subgap region, which, depending on the ratio h0/, can eventually cross below the Fermi energy at certain critical values Lc, and induce spin- and fermion paritychanging quantum phase transitions. We argue that this type of device constitute a promising highly-tunableplatform to engineer subgap ABS.Fil: Feijoo, Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Iucci, Carlos Aníbal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Lobos, Alejandro Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; ArgentinaAmerican Physical Society2023-06info: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/11336/230519Feijoo, Javier; Iucci, Carlos Aníbal; Lobos, Alejandro Martin; Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures; American Physical Society; Physical Review B; 107; 21; 6-2023; 1-132469-99502469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevB.107.214505info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.107.214505info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:47:33Zoai:ri.conicet.gov.ar:11336/230519instacron: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 10:47:34.218CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
title Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
spellingShingle Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
Feijoo, Javier
ESTADOS LIGADOS DE ANDREEV
HETEROESTRUCTURAS HÍBRIDAS
SUPERCONDUCTORES TOPOLOGICOS
title_short Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
title_full Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
title_fullStr Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
title_full_unstemmed Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
title_sort Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures
dc.creator.none.fl_str_mv Feijoo, Javier
Iucci, Carlos Aníbal
Lobos, Alejandro Martin
author Feijoo, Javier
author_facet Feijoo, Javier
Iucci, Carlos Aníbal
Lobos, Alejandro Martin
author_role author
author2 Iucci, Carlos Aníbal
Lobos, Alejandro Martin
author2_role author
author
dc.subject.none.fl_str_mv ESTADOS LIGADOS DE ANDREEV
HETEROESTRUCTURAS HÍBRIDAS
SUPERCONDUCTORES TOPOLOGICOS
topic ESTADOS LIGADOS DE ANDREEV
HETEROESTRUCTURAS HÍBRIDAS
SUPERCONDUCTORES TOPOLOGICOS
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 study the spectral properties of a one dimensional semiconductor-superconductor-ferromagnetic insulator (SE-SU-FMI) hybrid nanostructure, motivated by recent experiments where such devices have been fabricated using epitaxial growing techniques. We model the hybrid structure as a one-dimensional single-channel semiconductor nanowire under the simultaneous effect of two proximity-induced interactions: superconducting pairing and a (spatially inhomogeneous) Zeeman exchange field. The coexistence of these competing mechanisms generates a rich quantum phase diagram and a complex subgap Andreev bound state (ABS) spectrum. By exploiting the symmetries of the problem, we classify the solutions of the Bogoliubov-de Gennes equations into even and odd ABS with respect to the spatial inversion symmetry x → −x. We find the ABS spectrum of the device as a function of the different parameters of the model: the length L of the coexisting SU-FMI region, the induced Zeeman exchange field h0, and the induced superconducting coherence length ξ . In particular we analyze the evolution of the subgap spectrum as a function of the length L. Interestingly, we generically find spin-polarized ABS emerging in the subgap region, which, depending on the ratio h0/, can eventually cross below the Fermi energy at certain critical values Lc, and induce spin- and fermion paritychanging quantum phase transitions. We argue that this type of device constitute a promising highly-tunableplatform to engineer subgap ABS.
Fil: Feijoo, Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Iucci, Carlos Aníbal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Lobos, Alejandro Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina
description We theoretically study the spectral properties of a one dimensional semiconductor-superconductor-ferromagnetic insulator (SE-SU-FMI) hybrid nanostructure, motivated by recent experiments where such devices have been fabricated using epitaxial growing techniques. We model the hybrid structure as a one-dimensional single-channel semiconductor nanowire under the simultaneous effect of two proximity-induced interactions: superconducting pairing and a (spatially inhomogeneous) Zeeman exchange field. The coexistence of these competing mechanisms generates a rich quantum phase diagram and a complex subgap Andreev bound state (ABS) spectrum. By exploiting the symmetries of the problem, we classify the solutions of the Bogoliubov-de Gennes equations into even and odd ABS with respect to the spatial inversion symmetry x → −x. We find the ABS spectrum of the device as a function of the different parameters of the model: the length L of the coexisting SU-FMI region, the induced Zeeman exchange field h0, and the induced superconducting coherence length ξ . In particular we analyze the evolution of the subgap spectrum as a function of the length L. Interestingly, we generically find spin-polarized ABS emerging in the subgap region, which, depending on the ratio h0/, can eventually cross below the Fermi energy at certain critical values Lc, and induce spin- and fermion paritychanging quantum phase transitions. We argue that this type of device constitute a promising highly-tunableplatform to engineer subgap ABS.
publishDate 2023
dc.date.none.fl_str_mv 2023-06
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/11336/230519
Feijoo, Javier; Iucci, Carlos Aníbal; Lobos, Alejandro Martin; Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures; American Physical Society; Physical Review B; 107; 21; 6-2023; 1-13
2469-9950
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/230519
identifier_str_mv Feijoo, Javier; Iucci, Carlos Aníbal; Lobos, Alejandro Martin; Subgap states and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures; American Physical Society; Physical Review B; 107; 21; 6-2023; 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.107.214505
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.107.214505
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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