Low-energy plasmon excitations in infinite-layer nickelates

The discovery of superconductivity in infinite-layer nickelates is presently an important topic in condensed-matter physics, and potential similarities to and differences from cuprates are under intense debate. We determine general features of the charge excitation spectrum in nickelates from two op...

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Autores: Zinni, Luciano Sebastian, Bejas, Matias Hector, Yamase, Hiroyuki, Greco, Andres Francisco
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/222915
Acceso en línea:http://hdl.handle.net/11336/222915
Access Level:acceso abierto
Palabra clave:PLASMONS
NICKELATES
RANDOM PHASE APPROXIMATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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spelling Low-energy plasmon excitations in infinite-layer nickelatesZinni, Luciano SebastianBejas, Matias HectorYamase, HiroyukiGreco, Andres FranciscoPLASMONSNICKELATESRANDOM PHASE APPROXIMATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The discovery of superconductivity in infinite-layer nickelates is presently an important topic in condensed-matter physics, and potential similarities to and differences from cuprates are under intense debate. We determine general features of the charge excitation spectrum in nickelates from two opposite viewpoints: (i) Nickelates are regarded as strongly correlated electron systems like cuprate superconductors and thus can be described by the t-J model, and (ii) electron correlation effects are not as strong as in cuprates, and thus, random-phase approximation (RPA) calculations may capture the essential physics. We find that in both cases, plasmon excitations are realized around the momentum transfer q=(0,0,qz), although they tend to be damped more strongly in the RPA. In particular, this damping is enhanced by the relatively large interlayer hopping expected in nickelates. Besides reproducing the optical plasmon at q=(0,0,0) observed in Nd0.8Sr0.2NiO2, we obtain low-energy plasmons with gaps of ∼360 and ∼560 meV at q=(0,0,qz) for finite qz in cases (i) and (ii), respectively. The present work offers a possible theoretical hint to answer whether nickelates are cupratelike or not and contributes to the general understanding of the charge dynamics in nickelates.Fil: Zinni, Luciano Sebastian. 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: Bejas, Matias Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaFil: Yamase, Hiroyuki. Tsukuba University. National Institute For Materials Science; JapónFil: Greco, Andres Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaAmerican Physical Society2023-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/222915Zinni, Luciano Sebastian; Bejas, Matias Hector; Yamase, Hiroyuki; Greco, Andres Francisco; Low-energy plasmon excitations in infinite-layer nickelates; American Physical Society; Physical Review B; 107; 1; 1-2023; 14503-145092469-99502469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.107.014503info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.107.014503info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:50:12Zoai:ri.conicet.gov.ar:11336/222915instacron: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:34982024-05-08 13:50:12.703CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Low-energy plasmon excitations in infinite-layer nickelates
title Low-energy plasmon excitations in infinite-layer nickelates
spellingShingle Low-energy plasmon excitations in infinite-layer nickelates
Zinni, Luciano Sebastian
PLASMONS
NICKELATES
RANDOM PHASE APPROXIMATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Low-energy plasmon excitations in infinite-layer nickelates
title_full Low-energy plasmon excitations in infinite-layer nickelates
title_fullStr Low-energy plasmon excitations in infinite-layer nickelates
title_full_unstemmed Low-energy plasmon excitations in infinite-layer nickelates
title_sort Low-energy plasmon excitations in infinite-layer nickelates
dc.creator.none.fl_str_mv Zinni, Luciano Sebastian
Bejas, Matias Hector
Yamase, Hiroyuki
Greco, Andres Francisco
author Zinni, Luciano Sebastian
author_facet Zinni, Luciano Sebastian
Bejas, Matias Hector
Yamase, Hiroyuki
Greco, Andres Francisco
author_role author
author2 Bejas, Matias Hector
Yamase, Hiroyuki
Greco, Andres Francisco
author2_role author
author
author
dc.subject.none.fl_str_mv PLASMONS
NICKELATES
RANDOM PHASE APPROXIMATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic PLASMONS
NICKELATES
RANDOM PHASE APPROXIMATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description The discovery of superconductivity in infinite-layer nickelates is presently an important topic in condensed-matter physics, and potential similarities to and differences from cuprates are under intense debate. We determine general features of the charge excitation spectrum in nickelates from two opposite viewpoints: (i) Nickelates are regarded as strongly correlated electron systems like cuprate superconductors and thus can be described by the t-J model, and (ii) electron correlation effects are not as strong as in cuprates, and thus, random-phase approximation (RPA) calculations may capture the essential physics. We find that in both cases, plasmon excitations are realized around the momentum transfer q=(0,0,qz), although they tend to be damped more strongly in the RPA. In particular, this damping is enhanced by the relatively large interlayer hopping expected in nickelates. Besides reproducing the optical plasmon at q=(0,0,0) observed in Nd0.8Sr0.2NiO2, we obtain low-energy plasmons with gaps of ∼360 and ∼560 meV at q=(0,0,qz) for finite qz in cases (i) and (ii), respectively. The present work offers a possible theoretical hint to answer whether nickelates are cupratelike or not and contributes to the general understanding of the charge dynamics in nickelates.
publishDate 2023
dc.date.none.fl_str_mv 2023-01
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/11336/222915
Zinni, Luciano Sebastian; Bejas, Matias Hector; Yamase, Hiroyuki; Greco, Andres Francisco; Low-energy plasmon excitations in infinite-layer nickelates; American Physical Society; Physical Review B; 107; 1; 1-2023; 14503-14509
2469-9950
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/222915
identifier_str_mv Zinni, Luciano Sebastian; Bejas, Matias Hector; Yamase, Hiroyuki; Greco, Andres Francisco; Low-energy plasmon excitations in infinite-layer nickelates; American Physical Society; Physical Review B; 107; 1; 1-2023; 14503-14509
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://journals.aps.org/prb/abstract/10.1103/PhysRevB.107.014503
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.107.014503
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
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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15,81155

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