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تسجيل مستخدم جديدAnomalous finite-size effect in superconducting Josephson junction arrays
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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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