Phys. Rev. Lett. 85, 1104–1107 (2000)Viscoelastic Depinning of Driven Systems: Mean-Field Plastic ScallopsReceived 27 December 1999; published in the issue dated 31 July 2000 We have investigated the mean-field dynamics of an overdamped viscoelastic medium driven through quenched disorder. The model allows for the coexistence of pinned and sliding regions and can exhibit continuous elastic depinning or first-order hysteretic depinning. Numerical simulations indicate mean-field instabilities that correspond to macroscopic stick-slip events and lead to premature switching. The model describes the elastic and plastic dynamics of driven vortex arrays in superconductors and other extended disordered systems. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.1104
DOI:
10.1103/PhysRevLett.85.1104
PACS:
74.60.Ge, 62.20.Fe
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