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dc.contributor.author
Zinni, Luciano Sebastian
dc.contributor.author
Bejas, Matias Hector
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Yamase, Hiroyuki
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Greco, Andres Francisco
dc.date.available
2024-01-09T11:15:13Z
dc.date.issued
2023-01
dc.identifier.citation
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
dc.identifier.issn
2469-9950
dc.identifier.uri
http://hdl.handle.net/11336/222915
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
PLASMONS
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NICKELATES
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RANDOM PHASE APPROXIMATION
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Física de los Materiales Condensados
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Low-energy plasmon excitations in infinite-layer nickelates
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-01-08T14:15:16Z
dc.identifier.eissn
2469-9969
dc.journal.volume
107
dc.journal.number
1
dc.journal.pagination
14503-14509
dc.journal.pais
Estados Unidos
dc.description.fil
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; Argentina
dc.description.fil
Fil: 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; Argentina
dc.description.fil
Fil: Yamase, Hiroyuki. Tsukuba University. National Institute For Materials Science; Japón
dc.description.fil
Fil: 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; Argentina
dc.journal.title
Physical Review B
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.107.014503
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevB.107.014503
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