INFLUENCE OF PINNING CENTRE DISTRIBUTION ON THE DYNAMICS OF TWO-DIMENSIONAL VORTEX SYSTEM |
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Authors: | Luo Meng-bo Jiao Zheng-kuan Ren Qing-bao and Chen Qing-hu |
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Institution: | Department of Physics, Zhejiang University, Hangzhou 310027, China; Department of Physics, Lishui Teacher College, Lishui 323000, China |
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Abstract: | 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 Lpx. |
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Keywords: | pinning vortex lattice dynamics |
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