Electronic crossover suggested by Raman scattering in overdoped (Y,Ca)Ba2Cu3Oy

T. Masui; T. Hiramachi; K. Nagasao; S. Tajima

Electronic crossover suggested by Raman scattering in overdoped (Y,Ca)Ba2Cu3Oy

Superconductivity 2009-01-07 v1

Authors: T. Masui , T. Hiramachi , K. Nagasao , S. Tajima

Abstract

The electronic Raman scattering in overdoped (Y,Ca)Ba2Cu3Oy was investigated with changing hole concentration in the superconducting state. It was found that the superconducting responses such as the pair-breaking peaks in the A1g and B1g spectra and the anisotropy of the pair-breaking peak in XX and YY polarizations radically change at around the carrier doping p=0.19. Since both a- and c-axis resistivities strongly suggest the closing of pseudogap at p~0.18, the observed change at p=0.19 in superconducting Raman response is attributed to the electronic crossover due to the collapse of the pseudogap.

Keywords

high-temperature superconductivity cuprate superconductors superconductivity

Cite

@article{arxiv.0901.0620,
  title  = {Electronic crossover suggested by Raman scattering in overdoped (Y,Ca)Ba2Cu3Oy},
  author = {T. Masui and T. Hiramachi and K. Nagasao and S. Tajima},
  journal= {arXiv preprint arXiv:0901.0620},
  year   = {2009}
}

Comments

13 pages, 5 figures

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