Abstract
We show how commonly used models for vortex lines in three-dimensional superconductors can be modified to include excitations. We construct a formula for the 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.
- Received 21 December 1998
DOI:https://doi.org/10.1103/PhysRevB.59.8451
©1999 American Physical Society