Boson Mapping and Nonlinear Response of Type-II Superconductors
H. D. Chen, W. P. Bai, D. L. Yin, Y. L. Zhu, G. Li, C. Y. Li
Abstract
The vortices in a high-Tc superconductor with strong correlated pinning centers have been studied numerically using the mapping to charged bosons in two-dimensions(2D) and the Monte-Carlo algorithm. Considering the viscous dissipation of moving vortices we derived a nonlinear voltage response expression which describes different regimes and their crossover uniformly. This equation accords with experimental results.
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