Mode-locking in ac-driven vortex lattices with random pinning

Details Mode-locking in ac-driven vortex lattices with random pinning Mode-locking in ac-driven vortex lattices with random pinning

2000-12-19

arxiv.org/abs/cond-mat/0012368v1

Phys. Rev. Lett. 86, 4112 (2001); Erratum: Phys. Rev. Lett. 88, 079902 (2002).

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.86.4112

We find mode-locking steps in simulated current-voltage characteristics of ac-driven vortex lattices with {\it random} pinning. For low frequencies there is mode-locking above a finite ac force amplitude, while for large frequencies there is mode-locking for any small ac force. This is correlated with the nature of temporal order in the different regimes in the absence of ac drive. The mode-locked state is a frozen solid pinned in the moving reference of frame, and the depinning from the step shows plastic flow and hysteresis.

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