Disorder and thermally driven melting of the flux-line lattice in anisotropic layered superconductors

作者：Liu M^*; He YW; Wu WJ; Yang YH

来源：Physical Review B, 2005, 71(22): 224508.

DOI：10.1103/PhysRevB.71.224508

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.

• 出版日期2005-6
• 单位东南大学