Raman response in superconducting multiorbital systems with application to nickelates

Autores
Bejas, Matias Hector; Zhan, Jun; Wu, Xianxin; Schnyder, Andreas P.; Greco, Andres Francisco
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The recent discovery of high- superconductivity in pressurized and thin film nickelates is nowadays one of the most relevant and active topics in solid-state physics. The origin of superconductivity together with the relevance of multiorbital physics are highly discussed issues in this field. Knowledge of the size of the gap and its symmetry is of fundamental interest to uncover the superconducting mechanism at play in the nickelates. Electronic Raman scattering is a powerful tool to investigate the main characteristics of the gap. Here, we investigate the Raman response in the superconducting phase for three different models: Two-orbital models, including 2−2 and 2 orbitals, with one and two layers; as well as a bilayer model with the 2−2 orbital as the only active one. For each of these models, we consider different pairing symmetries and determine their characteristic fingerprints in the Raman response. For the two-orbital models, we perform full multiorbital calculations including interorbital and intraorbital scattering, and compare the results with those obtained using the additive Raman response where each band is considered separately. Our results should be useful for discussing the minimal model for superconductivity and its pairing symmetry in nickelates. The obtained results and discussions, as well as the presented formalism, are also of general interest for other multiorbital systems.
Fil: Bejas, Matias Hector. Universidad Nacional de Rosario. Facultad de Ciencias Exactas, Ingeniería y Agrimensura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario; Argentina
Fil: Zhan, Jun. Chinese Academy of Sciences; República de China
Fil: Wu, Xianxin. Chinese Academy of Sciences; República de China
Fil: Schnyder, Andreas P.. Chinese Academy of Sciences; República de China
Fil: Greco, Andres Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario; Argentina. Universidad Nacional de Rosario. Facultad de Ciencias Exactas, Ingeniería y Agrimensura; Argentina
Materia
MULTIBAND SUPERCONDUCTIVITY
SUPERCONDUCTING ORDER PARAMETER
NICKELATES
SUPERCONDUCTORS
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:11336/286424
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Raman response in superconducting multiorbital systems with application to nickelatesBejas, Matias HectorZhan, JunWu, XianxinSchnyder, Andreas P.Greco, Andres FranciscoMULTIBAND SUPERCONDUCTIVITYSUPERCONDUCTING ORDER PARAMETERNICKELATESSUPERCONDUCTORShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The recent discovery of high- superconductivity in pressurized and thin film nickelates is nowadays one of the most relevant and active topics in solid-state physics. The origin of superconductivity together with the relevance of multiorbital physics are highly discussed issues in this field. Knowledge of the size of the gap and its symmetry is of fundamental interest to uncover the superconducting mechanism at play in the nickelates. Electronic Raman scattering is a powerful tool to investigate the main characteristics of the gap. Here, we investigate the Raman response in the superconducting phase for three different models: Two-orbital models, including 2−2 and 2 orbitals, with one and two layers; as well as a bilayer model with the 2−2 orbital as the only active one. For each of these models, we consider different pairing symmetries and determine their characteristic fingerprints in the Raman response. For the two-orbital models, we perform full multiorbital calculations including interorbital and intraorbital scattering, and compare the results with those obtained using the additive Raman response where each band is considered separately. Our results should be useful for discussing the minimal model for superconductivity and its pairing symmetry in nickelates. The obtained results and discussions, as well as the presented formalism, are also of general interest for other multiorbital systems.Fil: Bejas, Matias Hector. Universidad Nacional de Rosario. Facultad de Ciencias Exactas, Ingeniería y Agrimensura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario; ArgentinaFil: Zhan, Jun. Chinese Academy of Sciences; República de ChinaFil: Wu, Xianxin. Chinese Academy of Sciences; República de ChinaFil: Schnyder, Andreas P.. Chinese Academy of Sciences; República de ChinaFil: Greco, Andres Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario; Argentina. Universidad Nacional de Rosario. Facultad de Ciencias Exactas, Ingeniería y Agrimensura; ArgentinaAmerican Physical Society2026-04info: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/11336/286424Bejas, Matias Hector; Zhan, Jun; Wu, Xianxin; Schnyder, Andreas P.; Greco, Andres Francisco; Raman response in superconducting multiorbital systems with application to nickelates; American Physical Society; Physical Review B; 113; 14; 4-2026; 144504-14450452469-9950CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/mvc9-3dhqinfo:eu-repo/semantics/altIdentifier/doi/10.1103/mvc9-3dhqinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-06-17T09:38:22Zoai:ri.conicet.gov.ar:11336/286424instacron: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:34982026-06-17 09:38:22.618CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Raman response in superconducting multiorbital systems with application to nickelates
title Raman response in superconducting multiorbital systems with application to nickelates
spellingShingle Raman response in superconducting multiorbital systems with application to nickelates
Bejas, Matias Hector
MULTIBAND SUPERCONDUCTIVITY
SUPERCONDUCTING ORDER PARAMETER
NICKELATES
SUPERCONDUCTORS
title_short Raman response in superconducting multiorbital systems with application to nickelates
title_full Raman response in superconducting multiorbital systems with application to nickelates
title_fullStr Raman response in superconducting multiorbital systems with application to nickelates
title_full_unstemmed Raman response in superconducting multiorbital systems with application to nickelates
title_sort Raman response in superconducting multiorbital systems with application to nickelates
dc.creator.none.fl_str_mv Bejas, Matias Hector
Zhan, Jun
Wu, Xianxin
Schnyder, Andreas P.
Greco, Andres Francisco
author Bejas, Matias Hector
author_facet Bejas, Matias Hector
Zhan, Jun
Wu, Xianxin
Schnyder, Andreas P.
Greco, Andres Francisco
author_role author
author2 Zhan, Jun
Wu, Xianxin
Schnyder, Andreas P.
Greco, Andres Francisco
author2_role author
author
author
author
dc.subject.none.fl_str_mv MULTIBAND SUPERCONDUCTIVITY
SUPERCONDUCTING ORDER PARAMETER
NICKELATES
SUPERCONDUCTORS
topic MULTIBAND SUPERCONDUCTIVITY
SUPERCONDUCTING ORDER PARAMETER
NICKELATES
SUPERCONDUCTORS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The recent discovery of high- superconductivity in pressurized and thin film nickelates is nowadays one of the most relevant and active topics in solid-state physics. The origin of superconductivity together with the relevance of multiorbital physics are highly discussed issues in this field. Knowledge of the size of the gap and its symmetry is of fundamental interest to uncover the superconducting mechanism at play in the nickelates. Electronic Raman scattering is a powerful tool to investigate the main characteristics of the gap. Here, we investigate the Raman response in the superconducting phase for three different models: Two-orbital models, including 2−2 and 2 orbitals, with one and two layers; as well as a bilayer model with the 2−2 orbital as the only active one. For each of these models, we consider different pairing symmetries and determine their characteristic fingerprints in the Raman response. For the two-orbital models, we perform full multiorbital calculations including interorbital and intraorbital scattering, and compare the results with those obtained using the additive Raman response where each band is considered separately. Our results should be useful for discussing the minimal model for superconductivity and its pairing symmetry in nickelates. The obtained results and discussions, as well as the presented formalism, are also of general interest for other multiorbital systems.
Fil: Bejas, Matias Hector. Universidad Nacional de Rosario. Facultad de Ciencias Exactas, Ingeniería y Agrimensura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario; Argentina
Fil: Zhan, Jun. Chinese Academy of Sciences; República de China
Fil: Wu, Xianxin. Chinese Academy of Sciences; República de China
Fil: Schnyder, Andreas P.. Chinese Academy of Sciences; República de China
Fil: Greco, Andres Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario; Argentina. Universidad Nacional de Rosario. Facultad de Ciencias Exactas, Ingeniería y Agrimensura; Argentina
description The recent discovery of high- superconductivity in pressurized and thin film nickelates is nowadays one of the most relevant and active topics in solid-state physics. The origin of superconductivity together with the relevance of multiorbital physics are highly discussed issues in this field. Knowledge of the size of the gap and its symmetry is of fundamental interest to uncover the superconducting mechanism at play in the nickelates. Electronic Raman scattering is a powerful tool to investigate the main characteristics of the gap. Here, we investigate the Raman response in the superconducting phase for three different models: Two-orbital models, including 2−2 and 2 orbitals, with one and two layers; as well as a bilayer model with the 2−2 orbital as the only active one. For each of these models, we consider different pairing symmetries and determine their characteristic fingerprints in the Raman response. For the two-orbital models, we perform full multiorbital calculations including interorbital and intraorbital scattering, and compare the results with those obtained using the additive Raman response where each band is considered separately. Our results should be useful for discussing the minimal model for superconductivity and its pairing symmetry in nickelates. The obtained results and discussions, as well as the presented formalism, are also of general interest for other multiorbital systems.
publishDate 2026
dc.date.none.fl_str_mv 2026-04
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/11336/286424
Bejas, Matias Hector; Zhan, Jun; Wu, Xianxin; Schnyder, Andreas P.; Greco, Andres Francisco; Raman response in superconducting multiorbital systems with application to nickelates; American Physical Society; Physical Review B; 113; 14; 4-2026; 144504-1445045
2469-9950
CONICET Digital
CONICET
url http://hdl.handle.net/11336/286424
identifier_str_mv Bejas, Matias Hector; Zhan, Jun; Wu, Xianxin; Schnyder, Andreas P.; Greco, Andres Francisco; Raman response in superconducting multiorbital systems with application to nickelates; American Physical Society; Physical Review B; 113; 14; 4-2026; 144504-1445045
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://link.aps.org/doi/10.1103/mvc9-3dhq
info:eu-repo/semantics/altIdentifier/doi/10.1103/mvc9-3dhq
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 13.040872

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