Numerical evidence for Lorentz-force independent dissipation in layered superconductors

We study numerically the dynamics of Josephson vortex systems in high-Tc superconductors. A uniform external current is applied in the CuO2 plane, which is either along or perpendicular to the magnetic field. For high magnetic field and/or high anisotropy, we find Lorentz-force independent dissipations, which is consistent with previous experimental results in BSCCO. The IV characteristics show nice power-law behaviors at intermediate temperatures, which clearly reveals Kosterlitz-Thouless property of the system