Crossovers and Phase Coherence in Cuprate Superconductors

Details Crossovers and Phase Coherence in Cuprate Superconductors Crossovers and Phase Coherence in Cuprate Superconductors

1997-10-07

arxiv.org/abs/cond-mat/9710059v1

Proceedings of the Cape Cod Conference on Spectroscopy of NovelSuperconductors-97, J. Phys. Chem. Solids, 59, 1705-1710 (1998)

Physics

Condensed Matter

Superconductivity

5 pages, Latex, Revtex

Scientific paper

10.1016/S0022-3697(98)00087-0

High temperature superconductivity is a property of doped antiferromagnetic insulators. The electronic structure is inhomogeneous on short length and time scales, and, as the temperature decreases, it evolves via two crossovers, before long range superconducting order is achieved. Except for overdoped materials, pairing and phase coherence occur at different temperatures, and phase fluctuations determine both T$_c$ and the temperature dependence of the superfluid density for a wide range of doping. A mechanism for obtaining a high pairing scale in a short coherence length material with a strong poorly-screened Coulomb interaction is described.

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