Bose-Einstein to BCS Crossover Picture for High-T_c Cuprates

Y. J. Uemura

doi:10.1016/S0921-4534(97)00194-9

Bose-Einstein to BCS Crossover Picture for High-T_c Cuprates

Superconductivity 2009-10-30 v1 Strongly Correlated Electrons

Authors: Y. J. Uemura

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Abstract

Combining (1) the universal correlations between $T_{c}$ and $n_{s}/m^{*}$ (superconducting carrier density / effective mass) and (2) the pseudo-gap behavior in the underdoped region, we obtain a picture to describe superconductivity in cuprate systems in evolution from Bose-Einstein to BCS condensation. Overdoped and Zn-substituted cuprate systems show signatures of reduced superfluid density in a microscopic phase separation. Scaling of $T_{c}$ to the superfluid volume density $n_{s}$ in all these cases indicate importance of Bose condensation.

Keywords

superfluid density cuprate superconductors Bose-Einstein condensation BCS condensation microscopic phase separation scaling

Cite

@article{arxiv.cond-mat/9706151,
  title  = {Bose-Einstein to BCS Crossover Picture for High-T_c Cuprates},
  author = {Y. J. Uemura},
  journal= {arXiv preprint arXiv:cond-mat/9706151},
  year   = {2009}
}

Comments

4 pages, 4 figures included inline (postscript), invited paper presented at M^2S-HTSC-V, Beijing, 1997. to be published, Physica C. email: [email protected]

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