Physics – Condensed Matter – Superconductivity
Scientific paper
1998-08-29
Phys. Rev. B58, 11161 (1998)
Physics
Condensed Matter
Superconductivity
4 pages, 4 figures (included), to appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.58.11161
The scaling behavior of the current-voltage characteristics of chiral and gauge glass models of disordered superconductors, are studied numerically, in two dimensions. For both models, the linear resistance is nonzero at finite temperatures and the scaling analysis of the nonlinear resistivity is consistent with a phase transition at T=0 temperature characterized by a diverging correlation length $\xi \propto T^{-\nu_{T}}$ and thermal critical exponent $\nu_{T}$. The values of $\nu_{T}$, however, are found to be different for the chiral and gauge glass models, suggesting different universality classes, in contrast to the result obtained recently in three dimensions.
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