title: Anomalous finite-size effect in superconducting Josephson junction arrays.
abstract: We show that a previously reported discrepancy between simulations of superconducting Josephson junction arrays and the theoretical analysis of Ambegaokar, Halperin, Nelson, and Siggia (AHNS) [Phys. Rev. Lett. 40, 783 (1978)] is rooted in a peculiar finite-size effect under periodic boundary conditions. Our simulation results for the largest array support the power-law I-V curves predicted by AHNS. Analysis of the vortex dynamics reveals two intrinsic length scales set by the applied current, which define three size regimes with distinctive I-V characteristics.
authors.affiliation: Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
authors.forename: Q H
authors.initials: QH
authors.lastname: Chen
authors.forename: L H
authors.initials: LH
authors.lastname: Tang
authors.forename: P
authors.initials: P
authors.lastname: Tong