Orbital Ingredients and Persistent Dirac Surface State for the Topological Band Structure in FeTe0.55Se0.45

dc.bibliographicCitation.articleNumber021043
dc.bibliographicCitation.firstPage021043
dc.bibliographicCitation.issue2
dc.bibliographicCitation.journalTitlePhysical Review X
dc.bibliographicCitation.volume14
dc.contributor.authorLi, Y.-F.
dc.contributor.authorChen, S.-D.
dc.contributor.authorGarcía-Díez, M.
dc.contributor.authorIraola, M. I.
dc.contributor.authorPfau, H.
dc.contributor.authorZhu, Y.-L.
dc.contributor.authorMao, Z.-Q.
dc.contributor.authorChen, T.
dc.contributor.authorYi, M.
dc.contributor.authorDai, P.-C.
dc.contributor.authorSobota, J. A.
dc.contributor.authorHashimoto, M.
dc.contributor.authorVergniory, M. G.
dc.contributor.authorLu, D.-H.
dc.contributor.authorShen, Z.-X.
dc.date.accessioned2024-10-15T08:49:16Z
dc.date.available2024-10-15T08:49:16Z
dc.date.issued2024
dc.description.abstractFeTe0.55Se0.45 (FTS) occupies a special spot in modern condensed matter physics at the intersections of electron correlation, topology, and unconventional superconductivity. The bulk electronic structure of FTS is predicted to be topologically nontrivial due to the band inversion between the dxz and pz bands along Γ-Z. However, there remain debates in both the authenticity of the Dirac surface states (DSSs) and the experimental deviations of band structure from the theoretical band inversion picture. Here we resolve these debates through a comprehensive angle-resolved photoemission spectroscopy investigation. We first observe a persistent DSS independent of kz. Then, by comparing FTS with FeSe, which has no band inversion along Γ-Z, we identify the spectral weight fingerprint of both the presence of the pz band and the inversion between the dxz and pz bands. Furthermore, we propose a renormalization scheme for the band structure under the framework of a tight-binding model preserving crystal symmetry. Our results highlight the significant influence of correlation on modifying the band structure and make a strong case for the existence of topological band structure in this unconventional superconductor.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/16792
dc.identifier.urihttps://doi.org/10.34657/15814
dc.language.isoeng
dc.publisherCollege Park, Md. : APS
dc.relation.doihttps://doi.org/10.1103/physrevx.14.021043
dc.relation.essn2160-3308
dc.rights.licenseCC BY 4.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.subject.ddc530
dc.subject.otherCrystal symmetryeng
dc.subject.otherElectronic structureeng
dc.subject.otherIron compoundseng
dc.subject.otherIron-based Superconductorseng
dc.subject.otherPhotoelectron spectroscopyeng
dc.subject.otherSelenium compoundseng
dc.subject.otherSurface stateseng
dc.subject.otherTellurium compoundseng
dc.subject.otherTopologyeng
dc.subject.otherAngle resolved photoemission spectroscopyeng
dc.subject.otherBand inversioneng
dc.subject.otherBulk electronic structureseng
dc.subject.otherCondensed-matter physicseng
dc.subject.otherOrbitalseng
dc.subject.otherRenormalizationeng
dc.subject.otherSpectral weighteng
dc.subject.otherTight-binding modelingeng
dc.subject.otherTopological bandseng
dc.subject.otherUnconventional superconductivityeng
dc.subject.otherBand structureeng
dc.titleOrbital Ingredients and Persistent Dirac Surface State for the Topological Band Structure in FeTe0.55Se0.45eng
dc.typeArticle
dc.typeText
tib.accessRightsopenAccess
wgl.contributorIFWD
wgl.subjectPhysikger
wgl.typeZeitschriftenartikelger
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