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

Alejandro B. Kolton·Daniel Dominguez·Niels Gronbech-Jensen
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Abstract

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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Alejandro B. Kolton, Daniel Dominguez, Niels Gronbech-Jensen. 2000-12-19. Mode-locking in ac-driven vortex lattices with random pinning. https://doi.org/10.1103/physrevlett.86.4112

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