Mode-locking behaviour: ac response of a driven disordered vortex lattice |
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Authors: | Wang You-Mei Cao Yi-Gang Jiao Zheng-Kuan |
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Affiliation: | Department of Physics, Zhejiang University, Hangzhou 310027, China |
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Abstract: | Using random pinning force simulations, we study numerically the alternating current (ac) response of the driven disordered vortex lattice. In the presence of a superimposed ac force, mode-locking steps are observed in the velocity-direct current (dc) force characteristics at high dc forces, where a smectic order occurs. The step width shows damped oscillations with the strength of interaction between vortices, in good agreement with recent experiments. |
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Keywords: | vortex lattice mode locking |
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