Observing the Inverse melting of the vortex lattice in Bi$_2$Sr$_2$CaCu$_2$O$_8$ with point defects using Langevin simulations with vortex shaking

Details Observing the Inverse melting of the vortex lattice in Bi$_2$Sr$_2$CaCu$_2$O$_8$ with point defects using Langevin simulations with vortex shaking Observing the Inverse melting of the vortex lattice in Bi$_2$Sr$_2$CaCu$_2$O$_8$ with point defects using Langevin simulations with vortex shaking

2008-01-17

arxiv.org/abs/0801.2701v1

Physics

Condensed Matter

Superconductivity

RevTex 4, 5 figures

Scientific paper

Langevin dynamics simulations of the vortex matter in the highly-anisotropic high-temperature superconductor Bi$_2$Sr$_2$CaCu$_2$O$_8$ were performed. We introduced point defects as a smoothened distribution of a random potential. Both the electromagnetic and Josephson interactions among pancake vortices were included. A special shaking and annealing process was introduced to let the system approach the equilibrium configuration. We are able to see the inverse melting transition from the Bragg-glass to the amorphous vortex glass state, in agreement with recent experiments.

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