Volume 39, Number 2, July II 1997
|Page(s)||207 - 212|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Nodes of the superconducting gap probed by electronic Raman scattering in HgBa2CaCu2O6+δ single crystals
Physique de la Matière Condensée, Ecole Normale Supérieure,
24 rue Lhomond, 75005 Paris, France
2 Physique Statistique, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
3 Physique de l'Etat Condensé, DRECAM/SPEC, CEA Saclay, 91191 Gif-sur-Yvette, France
Accepted: 13 June 1997
Pure electronic Raman spectra with no phonon structures superimposed to the electronic continuum are reported, in optimally doped single crystals K). As a consequence, the spectra in the and symmetries, including the crucial low-energy frequency dependence of the electronic scattering, are directly and reliably measured. The and, most strikingly, the spectra exhibit a strong intrinsic linear term, which suggests that the nodes are shifted from the  and [ 10] directions, a result inconsistent with a pure model.
PACS: 74.25.Gz – Optical properties / 74.72.Gr – Hg-base cuprates / 78.30.Er – Solid metals and alloys
© EDP Sciences, 1997
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