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\(\) wave superconductivity: Analysis of the electronic Raman data of \(\) and other cuprates

  • R. Nemetschek
  • R. Hackl
  • M. Opel
  • R. Philipp
  • M.T. Béal-Monod
  • J.B. Bieri
  • K. Maki
  • A. Erb
  • E. Walker

Abstract:

After briefly recalling the d+s model valid for some anisotropic high Tc superconductors, we present a theory of electronic Raman spectra in that model and then compare it with new experimental data obtained for an overdoped Y123 single crystal. The d+s model appears to describe satisfactorily the experimental results, indicating a possible doping dependence of the mixing ratio. We note that the Raman spectrum of the overdoped Bi2212 could also be accounted for by the d+s superconductivity model. The case of Hg1212 (or Hg1223) is reexamined. It appears that the spontaneous breakdown of d-wave symmetry may be rather universal in high Tc cuprates.

PACS. 74.72.-h High-Tc compounds[:AND:] 78.30.-j Infrared and Raman spectra 

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Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • R. Nemetschek
    • 1
  • R. Hackl
    • 1
  • M. Opel
    • 1
  • R. Philipp
    • 1
  • M.T. Béal-Monod
    • 2
  • J.B. Bieri
    • 2
  • K. Maki
    • 3
  • A. Erb
    • 4
  • E. Walker
    • 4
  1. 1.Walther Meissner Institut, Bayerische Akademie des Wissenschaften, 85748 Garching, GermanyDE
  2. 2.Physique des Solides, Université Paris-sud, 91400 Orsay, FranceFR
  3. 3.Department of Physics and Astronomy, U.S.C., Los Angeles, CA 90089-0484, USAUS
  4. 4.Departement de Physique de la Matière Condensée, Université de Genève, 24 quai E. Ansermet, 1211 Genève 4, SwitzerlandCH

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