中国物理B ›› 2001, Vol. 10 ›› Issue (3): 229-233.doi: 10.1088/1009-1963/10/3/311
任清褒1, 罗孟波2, 焦正宽2, 陈庆虎2
Luo Meng-bo (罗孟波)a, Jiao Zheng-kuan (焦正宽)a, Ren Qing-bao (任清褒)b, Chen Qing-hu (陈庆虎)a
摘要: Numerical study of the influence of the distribution of pinning centres on the dynamics of a two-dimensional vortex system is performed. The superconductor sample has a periodic structure with a pinned region of length Lp and an unpinned region of length Lx-Lp along the direction of driving force (Lorentz force). Results show that, at zero temperature, the critical force Fc increases with the increase of Lp, indicating that the homogeneity of pinning centres helps to enhance the critical electric current of the superconductor. At large driving forces, vortex static channels form in the pinned region even for Lp
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