Superconducting gap of overdoped Tl2Ba2CuO6+d observed by Raman scattering

Abstract

We report Raman scattering spectra for single crystals of overdoped Tl2Ba2CuO6+d (Tl-2201) at low temperatures. It was observed that the pair-breaking peaks in A1g and B1g spectra radically shift to lower energy with carrier doping. We interpret it as s-wave component mixing into d-wave, although the crystal structure is tetragonal. Since similar phenomena were observed also in YBa2Cu3Oy and Bi2Sr2CaCu2Oz, we conclude that s-wave mixing is a common property for overdoped high-Tc superconductors.

arXiv comment8 pages, 3 figures, proceedings of SNS2007

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Cited by in corpus (1)

• Three energy scales in the superconducting state of hole-doped cuprates detected by electronic Raman scattering