Springer LINK: The European Physical Journal B - Abstract Volume 5 Issue 3 (1998) pp 495-503

The European Physical Journal B

ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)

Table of Contents

Abstract Volume 5 Issue 3 (1998) pp 495-503

$\mathsf{d+s}$ wave superconductivity: Analysis of the electronic Raman data of $\mathsf{YBa_2Cu_3O_{7-\d}}$ and other cuprates

R. Nemetschek (1), R. Hackl (1), M. Opel (1), R. Philipp (1), M.T. Béal-Monod (2) (a), J.B. Bieri (2), K. Maki (3), A. Erb (4), E. Walker (4)

(1) Walther Meissner Institut, Bayerische Akademie des Wissenschaften, 85748 Garching, Germany
(2) Physique des Solides, Université Paris-sud, 91400 Orsay, France
(3) Department of Physics and Astronomy, U.S.C., Los Angeles, CA 90089-0484, USA
(4) Departement de Physique de la Matière Condensée, Université de Genève, 24 quai E. Ansermet, 1211 Genève 4, Switzerland

Received: 3 March 1998 / Accepted: 30 April 1998

Abstract: After briefly recalling the d+s model valid for some anisotropic high T_c 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 T_c cuprates.

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

(a) email: zazie@hprib.lps.u-psud.fr

Article in PDF format (381 KB)