Observing the Inverse melting of the vortex lattice in Bi2Sr2CaCu2O8 with point defects using Langevin simulations with vortex shaking
Abstract
Langevin dynamics simulations of the vortex matter in the highly-anisotropic high-temperature superconductor Bi2Sr2CaCu2O8 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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