CURRENT-VOLTAGE SCALING OF CHIRAL AND GAUGE-GLASS MODELS OF 2-DIMENSIONAL SUPERCONDUCTORS

The scaling behavior of the current-voltage characteristics of chiral and gauge-glass models of disordered superconductors, are studied nume rically, in two dimensions. For both models, the linear resistance is nonzero at finite temperatures and the scaling analysis of the nonline ar resistivity is consistent with a phase transition at T = 0 temperat ure characterized by a diverging correlation length xi proportional to T-nu T and thermal critical exponent nu(T). The values of nu(T), howe ver, are found to be different for the chiral and gauge-glass models, suggesting different universality classes, in contrast to the result o btained recently in three dimensions. [S0163-1829(98)017341-X].