Dynamical Phase Transition in a Driven Disordered Vortex Lattice

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 $\mathrm{M}{\mathrm{o}}_{77}\mathrm{G}{\mathrm{e}}_{23}$ thin film superconductors.

13 pages, latex, revtex, 4 figures available upon request from [email protected]

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