1999/02/04 by E. W. Carlson, S. A. Kivelson, V. J. Emery +1 · 1 citation
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.83.612
published as Phys. Rev. Lett. 83, 612 (1999) · 4 pages, 1 figure
arxiv created 1999/02/04 · arxiv updated 2009/11/30
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.