Decoupling and melting in a layered superconductor
Department of Mathematics, Imperial College, 180 Queen's Gate,
London, SW7 2BZ, UK
Accepted: 26 September 1997
We report results for a 3D simulation of a layered superconductor. The low-temperature phase corresponds to a triangular lattice of vortex lines. On increasing the temperature order is lost in the a-b plane, Tab with no detectable thermodynamic signature. On further increasing the temperature the vortex lines decouple completely at a first-order phase transition, Tdc. The entropy associated with the transition is dependent on the anisotropy chosen for the system and has values of and for the two anisotropies studied. The width is anisotropy dependent and is too narrow to be measured for the more anisotropic system studied, corresponding to sublimation of the vortices as reported in a recent experiment by Fuchs et al.
PACS: 74.60.-w – Type-II superconductivity / 74.25.Dw – Superconductivity phase diagrams / 07.05.Tp – Computer modeling and simulation
© EDP Sciences, 1997