Anomalous S-like dispersion of in-gap single-particle excitations in the pseudogap state of cuprate superconductors (Articolo in rivista)

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  • Anomalous S-like dispersion of in-gap single-particle excitations in the pseudogap state of cuprate superconductors (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.82.054508 (literal)
Alternative label
  • Julius Ranninger; Alfonso Romano (2010)
    Anomalous S-like dispersion of in-gap single-particle excitations in the pseudogap state of cuprate superconductors
    in Physical review. B, Condensed matter and materials physics (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Julius Ranninger; Alfonso Romano (literal)
Pagina inizio
  • 054508-1 (literal)
Pagina fine
  • 054508-6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://prb.aps.org/abstract/PRB/v82/i5/e054508 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 82 (literal)
Rivista
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  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [J. Ranninger] Institut Néel, CNRS et Université Joseph Fourier, BP 166, 38042 Grenoble Cedex 09, France; [A. Romano] CNR-SPIN, I-84084 Fisciano, Salerno, Italy, e Dipartimento di Fisica \"E. R. Caianiello,\" Università di Salerno, I-84084 Fisciano, Salerno, Italy (literal)
Titolo
  • Anomalous S-like dispersion of in-gap single-particle excitations in the pseudogap state of cuprate superconductors (literal)
Abstract
  • The single-particle excitations which control the opening of the pseudogap in the cuprate superconductors at some temperature T? are considered to derive their specific local spectral features from resonant pairing, whereby charge carriers get momentarily trapped on dynamically deformable molecular Cu-O-Cu clusters. We show how such local excitations evolve into overdamped modes with a characteristic \"S\"-like dispersion around the Fermi energy, as one passes below T?. This feature should be detectable in a \"momentum distribution curve\" angle-resolved photoemission spectroscopy analysis and help to elucidate the kind of pairing in the cuprates. Our study is based on a generic boson-fermion model for resonant pairing and is an extension of our previous dynamical mean-field theory study [?A. Romano and J. Ranninger, Phys. Rev. B 62, 4066 ?2000??] of the spectral properties of the pseudogap state. (literal)
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