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arXiv · 2506.05830

Anisotropic vortex motion and two-dimensional superconducting transition

Zhipeng Xu·Kun Jiang·Jiangping Hu
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Abstract

Vortex motion plays a central role in determining the resistance of two-dimensional superconductors, both in the context of the Berezinskii-Kosterlitz-Thouless (BKT) transition and in the mixed state of type-II superconductors under magnetic fields. In this study, we introduce an anisotropic pinning potential to investigate vortex-induced resistance across the BKT transition and the upper critical field $H_{c2}$ transition. Our results demonstrate that the anisotropic pinning potential gives rise to distinct critical temperatures and upper critical fields along two orthogonal directions of current transport. These findings provide a general route toward the realization of multiple "critical temperatures" in two-dimensional superconductors.

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Zhipeng Xu, Kun Jiang, Jiangping Hu. 2025-06-06. Anisotropic vortex motion and two-dimensional superconducting transition. https://doi.org/10.1103/vb55-n7rr

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