Issue |
Europhys. Lett.
Volume 39, Number 2, July II 1997
|
|
---|---|---|
Page(s) | 207 - 212 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1997-00336-3 | |
Published online | 01 September 2002 |
Nodes of the superconducting gap probed by electronic Raman scattering in HgBa2CaCu2O6+δ single crystals
1
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
Received:
28
April
1997
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 [110] and [ 1
0]
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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