Journal of Low Temperature Physics

, Volume 99, Issue 3–4, pp 201–203 | Cite as

The pairing mechanism in HTSC investigated by electronic Raman scattering

  • A. Hoffmann
  • P. Lemmens
  • L. Winkeler
  • G. Güntherodt
Experimental Facts

Abstract

By means of electronic Raman scattering we investigated the symmetry of the energy gap 2Δ(→k), its temperature dependence and its variation with doping of well characterized Bi2Sr2CaCu2O8+δ single crystals. The oxygen content δ was varied between the under- and the overdoped regime by subsequently annealing the same single crystal in Ar and in O2, respectively. The symmetry analysis of the polarized electronic Raman scattering is consistent with a dx2−y2-wave symmetry of the energy gap in both regimes. The gap ratio 2Δmax/kBTc and its temperature dependence changes with doping similar to predictions of theories based on paramagnon coupling.

Keywords

Oxygen Oxygen Content Magnetic Material Raman Scattering Dependence Change 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • A. Hoffmann
    • 1
  • P. Lemmens
    • 1
  • L. Winkeler
    • 1
  • G. Güntherodt
    • 1
  1. 1.2. Physikalisches Institut der RWTH-AachenAachenGermany

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