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Comment on "Voltage-Current Characteristics of the Two-Dimensional Gauge Glass Model"

M. V. Simkin

cond-matarXiv:cond-mat/9604178

Abstract

Li (Phys. Rev. Lett. 69,1819 (1992)) has computed the current-voltage characteristics (CVC) of a disordered two-dimensional (2D) Josephson-junction array and claimed that his data(nonlinear CVC for small temperatures), gives evidence for a finite-temperature phase transition in the 2D gauge-glass model in contradiction to the result of equilibrium simulations. In this Comment I show that the nonlinear CVC, found by Li, is merely a single-junction effect.

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