title: Disorder driven melting of the vortex line lattice.
abstract: The 3D XY model with random in-plane couplings is simulated to model the phase diagram of a disordered type II superconductor as a function of temperature T and randomness strength p for fixed applied magnetic field. As p increases to a critical p(c), the first order vortex lattice melting line turns parallel to the T axis, continuing down to low temperatures, rather than ending at a critical point. Above p(c) preliminary results suggest the absence of a phase coherent vortex glass.
authors.affiliation: Department of Theoretical Physics, Umeå University, 901 87 Umeå, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Olsson
authors.forename: S
authors.initials: S
authors.lastname: Teitel