Superconducting Coherence and the Helicity Modulus in Vortex Line Models

Details Superconducting Coherence and the Helicity Modulus in Vortex Line Models Superconducting Coherence and the Helicity Modulus in Vortex Line Models

1998-12-21

arxiv.org/abs/cond-mat/9812343v1

Phys. Rev. B 59, 8451 (1999).

Physics

Condensed Matter

Superconductivity

4 pages RevTeX, 2 eps figures included using epsf

Scientific paper

10.1103/PhysRevB.59.8451

We show how commonly used models for vortex lines in three dimensional superconductors can be modified to include k=0 excitations. We construct a formula for the k=0 helicity modulus in terms of fluctuations in the projected area of vortex loops. This gives a convenient criterion for the presence of superconducting coherence. We also present Monte Carlo simulations of a continuum vortex line model for the melting of the Abrikosov vortex lattice in pure YBCO.

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