Current-voltage scaling of a Josephson-junction array at irrational frustration

Details Current-voltage scaling of a Josephson-junction array at irrational frustration Current-voltage scaling of a Josephson-junction array at irrational frustration

1996-08-21

arxiv.org/abs/cond-mat/9608091v1

Phys. Rev. B54, 9655 (1996).

Physics

Condensed Matter

RevTex 3.0, 12 pages with Latex figures, to appear in Phys. Rev. B 54, Rapid. Comm

Scientific paper

10.1103/PhysRevB.54.R9655

Numerical simulations of the current-voltage characteristics of an ordered two-dimensional Josephson junction array at an irrational flux quantum per plaquette are presented. The results are consistent with an scaling analysis which assumes a zero temperature vortex glass transition. The thermal correlation length exponent characterizing this transition is found to be significantly different from the corresponding value for vortex-glass models in disordered two-dimensional superconductors. This leads to a current scale where nonlinearities appear in the current-voltage characteristics decreasing with temperature $T$ roughly as $T^2$ in contrast with the $T^3$ behavior expected for disordered models.

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