We develop a three-dimensional flux line lattice model in the layered superconductors, taking into account both long-range magnetic interactions between pancake vortices located in different layers for a single flux line and those between vortices located in the same layer for different flux lines. Using Langevin dynamic simulations, we study the disorder and thermally driven melting transitions from a disentangled Bragg glass (BG) with quasi-long-range order to an entangled amorphous vortex glass (VG) or a vortex liquid (VL) in the disorder strength-temperature phase diagram. Owing to nonmonotonous temperature dependence of the interactions between vortices, the BG-VG melting line exhibit unusual temperature behavior, reproducing the inverse melting phenomenon observed recently on BSCCO crystals.

• Received 26 January 2005

DOI:https://doi.org/10.1103/PhysRevB.71.224508