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Anomalous finite-size effect in superconducting Josephson junction arrays

Qing-Hu Chen·Lei-Han Tang·Peiqing Tong
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Abstract

We report large-scale simulations of the resistively-shunted Josephson junction array in strip geometry. As the strip width increases, the voltage first decreases following the dynamic scaling ansatz proposed by Minnhagen {\it et al.} [Phys. Rev. Lett. {\bf 74}, 3672 (1995)], and then rises towards the asymptotic value predicted by Ambegaokar {\it et al.} [Phys. Rev. Lett. {\bf 40}, 783 (1978)]. The nonmonotonic size-dependence is attributed to shortened life time of free vortices in narrow strips, and points to the danger of single-scale analysis applied to a charge-neutral superfluid state.

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Qing-Hu Chen, Lei-Han Tang, Peiqing Tong. 2001-04-20. Anomalous finite-size effect in superconducting Josephson junction arrays. https://doi.org/10.1103/physrevlett.87.067001

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