Driven Dynamics of Periodic Elastic Media in Disorder

Details Driven Dynamics of Periodic Elastic Media in Disorder Driven Dynamics of Periodic Elastic Media in Disorder

1997-08-29

arxiv.org/abs/cond-mat/9708222v1

Phys. Rev. E 57, 2574 (1998)

Physics

Condensed Matter

Statistical Mechanics

21 pages Latex with 4 figures

Scientific paper

10.1103/PhysRevE.57.2574

We analyze the large-scale dynamics of vortex lattices and charge density waves driven in a disordered potential. Using a perturbative coarse-graining procedure we present an explicit derivation of non-equilibrium terms in the renormalized equation of motion, in particular Kardar-Parisi-Zhang non-linearities and dynamic strain terms. We demonstrate the absence of glassy features like diverging linear friction coefficients and transverse critical currents in the drifting state. We discuss the structure of the dynamical phase diagram containing different elastic phases very small and very large drive and plastic phases at intermediate velocity.

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