Depinning and dynamics of AC driven vortex lattices in random media

Abstract

We study the different dynamical regimes of a vortex lattice driven by AC forces in the presence of random pinning via numerical simulations. The behaviour of the different observables is charaterized as a function of the applied force amplitude for different frequencies. We discuss the inconveniences of using the mean velocity to identify the depinnig transition and we show that instead, the mean quadratic displacement of the lattice is the relevant magnitude to characterize different AC regimes. We discuss how the results depend on the initial configuration and we identify new hysteretic effects which are absent in the DC driven systems.

6 pages, 4 figures

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Cited by in corpus (5)

• Dynamics of superconducting vortices driven by oscillatory forces in the plastic flow regime
• Mean field theory for driven domain walls in disordered environments
• Ac dynamic reorganization and non-equilibrium phase transition in driven vortex matter
• Activated vortex lattice transition in a superconductor with combined sixfold and twelvefold anisotropic interactions
• Vortices in a Ginzburg Landau Theory of Superconductors with Nematic Order