Photoemission signature of momentum-dependent hybridization in CeCoIn5

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dc.contributor.authorKurleto, R.
dc.contributor.authorFidrysiak, M.
dc.contributor.authorNicolai, Laurent Christophe
dc.contributor.authorMinár, Jan
dc.contributor.authorRosmus, M.
dc.contributor.authorWalczak, Ł.
dc.contributor.authorTejeda, A.
dc.contributor.authorRault, J.E.
dc.contributor.authorBertran, F.
dc.contributor.authorKądzielawa, A.P.
dc.contributor.authorLegut, D.
dc.contributor.authorGnida, D.
dc.contributor.authorKaczorowski, D.
dc.contributor.authorKissner, K.
dc.contributor.authorReinert, F.
dc.contributor.authorSpałek, J.
dc.contributor.authorStarowicz, P.
dc.date.accessioned2023-02-13T11:00:18Z
dc.date.available2023-02-13T11:00:18Z
dc.date.issued2021
dc.description.abstract-translatedHybridization between f electrons and conduction bands (c-f hybridization) is a driving force for many unusual phenomena. To provide insight into it, systematic studies of CeCoIn 5 heavy fermion superconductor have been performed by angle-resolved photoemission spectroscopy (ARPES) in a large angular range at temperature of T = 6 K. The used photon energy of 122 eV corresponds to Ce 4d-4f resonance. Calculations carried out with the relativistic multiple scattering Korringa-Kohn-Rostoker method and one-step model of photoemission yielded realistic simulation of the ARPES spectra, indicating that Ce-In surface termination prevails. Surface states, which have been identified in the calculations, contribute significantly to the spectra. Effects of the hybridization strongly depend on wave vector. They include a dispersion of heavy electrons and bands gaining f-electron character when approaching Fermi energy. We have also observed a considerable variation of f-electron spectral weight at EF , which is normally determined by both matrix element effects and wave vector dependent c-f hybridization. Fermi surface scans covering a few Brillouin zones revealed large matrix element effects. A symmetrization of experimental Fermi surface, which reduces matrix element contribution, yielded a specific variation of 4f-electron enhanced spectral intensity at EF around Gamma barre and M barre points. Tight-binding approximation calculations for Ce-In plane provided the same universal distribution of 4f-electron density for a range of values of the parameters used in the model.en
dc.format15 s.cs
dc.format.mimetypeapplication/pdf
dc.identifier.citationKURLETO, R. FIDRYSIAK, M. NICOLAI, LCH. MINÁR, J. ROSMUS, M. WALCZAK, Ł. TEJEDA, A. RAULT, J. BERTRAN, F. KĄDZIELAWA, A. LEGUT, D. GNIDA, D. KACZOROWSKI, D. KISSNER, K. REINERT, F. SPAŁEK, J. STAROWICZ, P. Photoemission signature of momentum-dependent hybridization in CeCoIn5. Physical Review B, 2021, roč. 104, č. 12, s. nestránkováno. ISSN: 2469-9950cs
dc.identifier.document-number692055900001
dc.identifier.doi10.1103/PhysRevB.104.125104
dc.identifier.issn2469-9950
dc.identifier.obd43936509
dc.identifier.uri2-s2.0-85114643408
dc.identifier.urihttp://hdl.handle.net/11025/51443
dc.language.isoenen
dc.project.IDEF15_003/0000358/Výpočetní a experimentální design pokročilých materiálů s novými funkcionalitamics
dc.publisherAmerican Physical Societyen
dc.relation.ispartofseriesPhysical Review Ben
dc.rights© American Physical Society.en
dc.rights.accessopenAccessen
dc.subject.translatedhybridizationen
dc.subject.translatedf electrons, photoemission, resonant ARPESen
dc.subject.translatedTight Binding modelen
dc.subject.translatedmultiple scattering KKRen
dc.titlePhotoemission signature of momentum-dependent hybridization in CeCoIn5en
dc.typepostprintcs
dc.typearticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen

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