Simulation of Dynamics in Two-Dimensional Vortex Systems in Random Media
Simulation of Dynamics in Two-Dimensional Vortex Systems in Random Media
复制标题
随机介质中二维涡系统的动力学仿真
DOI:
10.1088/0256-307x/26/2/027402
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发表时间:
2009-02
影响因子:
3.5
通讯作者:
Sun Li-Zhen
中科院分区:
文献类型:
--
作者:
Luo Meng-Bo;Zhang Wei;Sun Li-Zhen
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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