Classical Phase Fluctuations in High Temperature Superconductors

Details Classical Phase Fluctuations in High Temperature Superconductors Classical Phase Fluctuations in High Temperature Superconductors

1999-02-04

arxiv.org/abs/cond-mat/9902077v1

Phys. Rev. Lett. 83, 612 (1999)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.83.612

Phase fluctuations of the superconducting order parameter play a larger role in the cuprates than in conventional BCS superconductors because of the low superfluid density of a doped insulator. In this paper, we analyze an XY model of classical phase fluctuations in the high temperature superconductors using a low-temperature expansion and Monte Carlo simulations. In agreement with experiment, the value of the superfluid density at temperature T=0 is a quite robust predictor of Tc, and the evolution of the superfluid density with T, including its T-linear behavior at low temperature, is insensitive to microscopic details.

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