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Higher-order obstructed atomic insulator phase inpentagonal monolayer PdSe2

dc.contributor.authorNuñez V
dc.contributor.authorBravo S
dc.contributor.authorCorrea J.D
dc.contributor.authorChico L
dc.contributor.authorPacheco M.
dc.date.accessioned2024-07-31T21:06:58Z
dc.date.available2024-07-31T21:06:58Z
dc.date.created2024
dc.identifier.issn20531583
dc.identifier.urihttp://hdl.handle.net/11407/8434
dc.descriptionWe investigate a pentagonal monolayer of palladium diselenide, a stable two-dimensional system, as a material realization of a crystalline phase with nontrivial topological electronic properties. We find that its electronic structure involves an atomic obstructed insulator related to higher-order topology, which is a consequence of the selenium-selenium bond dimerization along with inversion and time-reversal symmetry). By means of first-principles calculations and the analysis of symmetry indicators and topological invariants, we also characterize the electronic corner states associated with the atomic obstruction and compute the corresponding corner charge for a finite geometry, which is found to be not quantized but still inversion-protected. Applying tensile strain to the finite geometry we verify the robustness of the corner states and also achieve a strain-controlled variation of the corner charge magnitude. © 2023 IOP Publishing Ltd.
dc.language.isoeng
dc.publisherInstitute of Physics
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85179891883&doi=10.1088%2f2053-1583%2fad0f2a&partnerID=40&md5=5ed26bcda8080e1d62cc8cdabd585e54
dc.source2D Materials
dc.source2D Materials
dc.sourceScopus
dc.subjectHigher order topologyeng
dc.subjectPentagonal materialseng
dc.subjectSSH modeleng
dc.subjectAtomseng
dc.subjectElectronic propertieseng
dc.subjectElectronic structureeng
dc.subjectMonolayerseng
dc.subjectPalladium compoundseng
dc.subjectSelenium compoundseng
dc.subjectTensile straineng
dc.subjectTopologyeng
dc.subjectA-stableeng
dc.subjectFinite geometryeng
dc.subjectHigh order topologyeng
dc.subjectHigh-ordereng
dc.subjectHigher-ordereng
dc.subjectInsulator phasiseng
dc.subjectOrder topologieseng
dc.subjectPentagonal materialeng
dc.subjectSSH modeleng
dc.subjectTwo-dimensional systemseng
dc.subjectSeleniumeng
dc.titleHigher-order obstructed atomic insulator phase inpentagonal monolayer PdSe2eng
dc.typearticle
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.type.spaArtículo
dc.identifier.doi10.1088/2053-1583/ad0f2a
dc.relation.citationvolume11
dc.relation.citationissue1
dc.publisher.facultyFacultad de Ciencias Básicasspa
dc.affiliationNuñez, V., Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile
dc.affiliationBravo, S., Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile
dc.affiliationCorrea, J.D., Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
dc.affiliationChico, L., IGISC, Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
dc.affiliationPacheco, M., Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile
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dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.reponamereponame:Repositorio Institucional Universidad de Medellín
dc.identifier.repourlrepourl:https://repository.udem.edu.co/
dc.identifier.instnameinstname:Universidad de Medellín


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