摘要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.
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.
ZHANG Wei;SUN Li-Zhen;LUO Meng-Bo. Simulation of Dynamics in Two-Dimensional Vortex Systems in Random Media[J]. 中国物理快报, 2009, 26(2): 27402-027402.
ZHANG Wei, SUN Li-Zhen, LUO Meng-Bo. Simulation of Dynamics in Two-Dimensional Vortex Systems in Random Media. Chin. Phys. Lett., 2009, 26(2): 27402-027402.
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2009, Vol. 26 
