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

M. Liu; Y. W. He; W. J. Wu; Y. H. Yang

doi:10.1103/PhysRevB.71.224508

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

M. Liu, Y. W. He, W. J. Wu, Y. H. Yang

DOI 10.1103/PhysRevB.71.224508 · Physical Review B

T1

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Abstract

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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown