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arXiv 1312.7850cond-mat.supr-concond-mat.stat-mech
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共形钉扎阵列中的涡输运和钉扎效应

Vortex Transport and Pinning Effectiveness in Conformal Pinning Arrays

D. Ray, C. Reichhardt, C. J. Olson Reichhardt, B. Janko

摘要:

我们研究了与共形晶体钉扎阵列相互作用的涡旋的电流驱动动力学,并与随机钉扎阵列驱动的涡旋动力学进行了比较。我们发现,钉扎增强的共形阵列在很宽的范围内的领域,与以前的结果从通量梯度驱动的模拟一致。在这个范围以上的字段,在移动的涡旋状态的钉扎的有效性可以提高在随机阵列相比,共形阵列,导致交叉的速度-力曲线。

英文摘要:

We examine the current driven dynamics for vortices interacting with conformal crystal pinning arrays and compare to the dynamics of vortices driven over random pinning arrays. We find that the pinning is enhanced in the conformal arrays over a wide range of fields, consistent with previous results from flux gradient-driven simulations. At fields above this range, the effectiveness of the pinning in the moving vortex state can be enhanced in the random arrays compared to the conformal arrays, leading to crossing of the velocity-force curves.

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