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Monte Carlo calculation of the current-voltage characteristics of a two dimensional lattice Coulomb gas

Hans Weber, Mats Wallin, Henrik Jeldtoft Jensen

cond-matarXiv:cond-mat/9601040

Abstract

We have studied the nonlinear current-voltage characteristic of a two dimensional lattice Coulomb gas by Monte Carlo simulation. We present three different determinations of the power-law exponent a(T) of the nonlinear current-voltage characteristic, V Ia(T)+1. The determinations rely on both equilibrium and non-equilibrium simulations. We find good agreement between the different determinations, and our results also agree closely with experimental results for Hg-Xe thin film superconductors and for certain single crystal thin-film high temperature superconductors.

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