Phys. Rev. B 69, 064515 (2004) [6 pages]Scaling determination of the nonlinear I-V characteristics for two-dimensional superconducting networksReceived 26 August 2003; revised 9 December 2003; published 27 February 2004 It is shown from computer simulations that the current-voltage (I-V) characteristics for the two-dimensional XY model with resistively shunted Josephson junction dynamics and Monte Carlo dynamics obeys a finite-size scaling form from which the nonlinear I-V exponent a can be determined to good precision. This determination supports the conclusion a=z+1, where z is the dynamic critical exponent. The results are discussed in the light of the contrary conclusion reached by Tang and Chen [Phys. Rev. B 67, 024508 (2003)] and the possibility of a breakdown of scaling suggested by Bormann [Phys. Rev. Lett. 78, 4324 (1997)]. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.064515
DOI:
10.1103/PhysRevB.69.064515
PACS:
74.50.+r, 05.60.Gg, 67.40.Rp, 75.10.Hk
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