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Dynamical Phase Transition in a Driven Disordered Vortex Lattice

Seungoh Ryu, M. Hellerqvist, S. Doniach, A. Kapitulnik, D. Stroud

cond-matarXiv:cond-mat/9606126

Abstract

Using Langevin dynamics, we have investigated the dynamics of vortices in a disordered two dimensional superconductor subjected to a uniform driving current. The results provide direct numerical evidence for a dynamical phase transition between a plastic flow regime and a moving ``hexatic glass." The simulated current-voltage characteristics are in excellent agreement with recent transport measurements on amorphous Mo77Ge23 thin film superconductors.

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