Resonances, instabilities, and structure selection of driven Josephson lattice in layered superconductors
A. E. Koshelev, I. S. Aranson
Abstract
We investigate dynamics of Josephson vortex lattice in layered high Tc superconductors at high magnetic fields. It is shown that the average electric current depends on the lattice structure and is resonantly enhanced when the Josephson frequency matches the frequency of the plasma mode. We find the stability regions of moving lattice. It is shown that a specific lattice structure at given velocity is uniquely selected by the boundary conditions: at small velocities periodic triangular lattice is stable and looses its stability at some critical velocity. At even higher velocities a structure close to a rectangular lattice is restored.
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