Dynamical Phases of Driven Vortices Interacting with Periodic Pinning

Details Dynamical Phases of Driven Vortices Interacting with Periodic Pinning Dynamical Phases of Driven Vortices Interacting with Periodic Pinning

2000-10-10

arxiv.org/abs/cond-mat/0010149v1

Physics

Condensed Matter

Superconductivity

4 pages with 4 figures. To be published in Phys. Rev. B Rapid Communications

Scientific paper

10.1103/PhysRevB.62.R14661

The finite temperature dynamical phases of vortices in films driven by a uniform force and interacting with the periodic pinning potential of a square lattice of columnar defects are investigated by Langevin dynamics simulations of a London model. Vortices driven along the [0,1] direction and at densities for which there are more vortices than columnar defects ($B>B_{\phi}$) are considered. At low temperatures, two new dynamical phases, elastic flow and plastic flow, and a sharp transition between them are identified and characterized according to the behavior of the vortex spatial order, velocity distribution and frequency-dependent velocity correlation

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