Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2003-12-02
Phys. Rev. B 69, 184512 (2004)
Physics
Condensed Matter
Disordered Systems and Neural Networks
8 pages, 10 figures; v2: some minor corrections
Scientific paper
10.1103/PhysRevB.69.184512
We investigate dynamic scaling properties of the two-dimensional gauge glass model for the vortex glass phase in superconductors with quenched disorder. From extensive Monte Carlo simulations we obtain static and dynamic finite size scaling behavior, where the static simulations use a temperature exchange method to ensure convergence at low temperatures. Both static and dynamic scaling of Monte Carlo data is consistent with a glass transition at zero temperature. We study a dynamic correlation function for the superconducting order parameter, as well as the phase slip resistance. From the scaling of these two functions, we find evidence for two distinct diverging correlation times at the zero temperature glass transition. The longer of these time scales is associated with phase slip fluctuations across the system that lead to finite resistance at any finite temperature, while the shorter time scale is associated with local phase fluctuations.
Nikolaou Marios
Wallin Mats
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