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Raman-scattering measurements and theory of the energy-momentum spectrum for underdoped Bi2Sr2CaCuO(8+δ) superconductors: evidence of an s-wave structure for the pseudogap.
Sakai, S; Blanc, S; Civelli, M; Gallais, Y; Cazayous, M; Méasson, M-A; Wen, J S; Xu, Z J; Gu, G D; Sangiovanni, G; Motome, Y; Held, K; Sacuto, A; Georges, A; Imada, M.
Afiliación
  • Sakai S; Centre de Physique Théorique, École Polytechnique, CNRS, 91128 Palaiseau, France and Department of Applied Physics, University of Tokyo, Hongo, Tokyo 113-8656, Japan and JST-CREST, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
  • Blanc S; Laboratoire Matériaux et Phénomnes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
  • Civelli M; Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR 8502, F-91405 Orsay Cedex, France.
  • Gallais Y; Laboratoire Matériaux et Phénomnes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
  • Cazayous M; Laboratoire Matériaux et Phénomnes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
  • Méasson MA; Laboratoire Matériaux et Phénomnes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
  • Wen JS; Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
  • Xu ZJ; Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
  • Gu GD; Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, New York 11973, USA.
  • Sangiovanni G; Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany and Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria.
  • Motome Y; Department of Applied Physics, University of Tokyo, Hongo, Tokyo 113-8656, Japan.
  • Held K; Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria.
  • Sacuto A; Laboratoire Matériaux et Phénomnes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.
  • Georges A; Centre de Physique Théorique, École Polytechnique, CNRS, 91128 Palaiseau, France and JST-CREST, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan and Collège de France, 11 Place Marcelin Berthelot, 75005 Paris, France and DPMC, Université de Genève, 24 Quai Ernest Ansermet, CH-1211 Genève, Suisse.
  • Imada M; Department of Applied Physics, University of Tokyo, Hongo, Tokyo 113-8656, Japan and JST-CREST, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Phys Rev Lett ; 111(10): 107001, 2013 Sep 06.
Article en En | MEDLINE | ID: mdl-25166695
ABSTRACT
We reveal the full energy-momentum structure of the pseudogap of underdoped high-Tc cuprate superconductors. Our combined theoretical and experimental analysis explains the spectral-weight suppression observed in the B2g Raman response at finite energies in terms of a pseudogap appearing in the single-electron excitation spectra above the Fermi level in the nodal direction of momentum space. This result suggests an s-wave pseudogap (which never closes in the energy-momentum space), distinct from the d-wave superconducting gap. Recent tunneling and photoemission experiments on underdoped cuprates also find a natural explanation within the s-wave pseudogap scenario.
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Bases de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2013 Tipo del documento: Article País de afiliación: Japón
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Bases de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2013 Tipo del documento: Article País de afiliación: Japón