Vortex Line Fluctuations in Model High Temperature Superconductors

Details Vortex Line Fluctuations in Model High Temperature Superconductors Vortex Line Fluctuations in Model High Temperature Superconductors

1992-07-07

arxiv.org/abs/cond-mat/9207008v1

Phys.Rev. B47 (1993) 359

Physics

Condensed Matter

38 pages, LaTeX 15 figures (upon request to stte@buckwheat.pas.rochester.edu)

Scientific paper

10.1103/PhysRevB.47.359

We carry out Monte Carlo simulations of the uniformly frustrated 3d XY model as a model for vortex line fluctuations in a high Tc superconductor. A density of vortex lines of f=1/25 is considered. We find two sharp phase transitions. The low T phase is an ordered vortex line lattice. The high T normal phase is a vortex line liquid with much entangling, cutting, and loop excitations. An intermediate phase is found which is characterized as a vortex line liquid of disentangled lines. In this phase, the system displays superconducting properties in the direction parallel to the magnetic field, but normal behavior in planes perpendicular to the magnetic field.

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