Superconducting Gap and Pseudogap in Bi-2212

Details Superconducting Gap and Pseudogap in Bi-2212 Superconducting Gap and Pseudogap in Bi-2212

1999-06-30

arxiv.org/abs/cond-mat/9906448v1

Physics

Condensed Matter

Superconductivity

2 pages, 1 EPS figure; LT22 Proceedings to appear in Physica B

Scientific paper

10.1016/S0921-4526(99)02344-3

We present results of Raman scattering experiments in differently doped Bi-2212 single crystals. Below Tc the spectra show pair-breaking features in the whole doping range. The low frequency power laws confirm the existence of a $d_{x^2-y^2}$-wave order parameter. In the normal state between Tc and T* = 200K we find evidence for a pseudogap in B2g symmetry. Upon doping its effect on the spectra decreases while its energy scale appears to be unchanged.

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