Experimental Study of the Incoherent Spectral Weight in the Photoemission Spectra of the Misfit Cobaltate [Bi2Ba2O4][CoO2](2) (Articolo in rivista)

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  • Experimental Study of the Incoherent Spectral Weight in the Photoemission Spectra of the Misfit Cobaltate [Bi2Ba2O4][CoO2](2) (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.104.056403 (literal)
Alternative label
  • Nicolaou, A.; Brouet, V.; Zacchigna, M.; Vobornik, I.; Tejeda, A.; Taleb-Ibrahimi, A.; Le Fevre, P.; Bertran, F.; Hebert, S.; Muguerra, H.; Grebille, D. (2010)
    Experimental Study of the Incoherent Spectral Weight in the Photoemission Spectra of the Misfit Cobaltate [Bi2Ba2O4][CoO2](2)
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Nicolaou, A.; Brouet, V.; Zacchigna, M.; Vobornik, I.; Tejeda, A.; Taleb-Ibrahimi, A.; Le Fevre, P.; Bertran, F.; Hebert, S.; Muguerra, H.; Grebille, D. (literal)
Pagina inizio
  • 056403 (literal)
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  • http://link.aps.org/doi/10.1103/PhysRevLett.104.056403 (literal)
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  • 104 (literal)
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  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
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  • a Laboratoire de Physique des Solides, Université Paris-Sud, UMR8502, B?t 510, 91405 Orsay, France b Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP48, 91192 Gif-sur-Yvette, France c CNR-INFM, Laboratorio Nazionale TASC C/o Area Science Park, strada statale 14, I-34012 Basovizza (TS), Italy d Institut Jean Lamour, CNRS-Nancy-Université-UPV-Metz, 54506 Vandoeuvre-les-Nancy, France e Laboratoire CRISMAT, UMR 6508 CNRS et Ensicaen, 14050 Caen, France (literal)
Titolo
  • Experimental Study of the Incoherent Spectral Weight in the Photoemission Spectra of the Misfit Cobaltate [Bi2Ba2O4][CoO2](2) (literal)
Abstract
  • Previous angle-resolved photoemission spectroscopy experiments in NaxCoO2 reported both a strongly renormalized bandwidth near the Fermi level and moderately renormalized Fermi velocities, leaving it unclear whether the correlations are weak or strong and how they could be quantified. We explain why this situation occurs and solve the problem by extracting clearly the coherent and incoherent parts of the band crossing the Fermi level. We show that one can use their relative weight to estimate self-consistently a quasiparticle weight Z=0.15±0.05. We suggest this method could be a reliable way to study the evolution of correlations in cobaltates and for comparison with other strongly correlated systems. © 2010 The American Physical Society. (literal)
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