Abstract Flow behavior of the driven two-dimensional vortex lattice is numerically studied with different densities of randomly distributed pointlike pinning centers. Different features in the curves of velocity-force dependence are found between the elastic and plastic regimes. Scaling fit between force and velocity above the critical driving force can be obtained in the elastic regime but fails in the plastic regime. Transition from the lastic to plastic regimes is accompanied by maximum peaks in the differential curves of velocity-force dependence in the disordered vortex lattice.
Received: 08 May 1999
Revised: 15 June 1999
Accepted manuscript online:
PACS:
74.25.Ld
(Mechanical and acoustical properties, elasticity, and ultrasonic Attenuation)
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