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Simulation of Dynamics in Two-Dimensional Vortex Systems in Random Media

  • Department of Physics, Zhejiang University, Hangzhou 310027

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  • Received Date: June 09, 2008
  • Published Date: January 31, 2009
    Abstract
  • Dynamics in two-dimensional vortex systems with random pinning centres is investigated using molecular dynamical simulations. The driving force and temperature dependences of vortex velocity are investigated. Below the critical depinning force Fc, a creep motion of vortex is found at low temperature. At forces slightly above Fc, a part of vortices flow in winding channels at zero temperature. In the vortex channel flow region, we observe the abnormal behaviour of vortex dynamics: the velocity is roughly independent of temperature or even decreases with temperature at low temperatures. A phase diagram that describes different dynamics of vortices is presented.
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    • References (21)
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