Europhys. Lett.
Volume 63, Number 5, September 2003
Page(s) 750 - 756
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 01 November 2003
DOI: 10.1209/epl/i2003-00581-4
Europhys. Lett., 63 (5) , pp. 750-756 (2003)

Two dynamic exponents in the resistive transition of fully frustrated Josephson-junction arrays

E. Granato1 and D. Domínguez2

1  Laboratório Associado de Sensores e Materiais Instituto Nacional de Pesquisas Espaciais 12201-190 São José dos Campos, São Paulo, Brazil
2  Centro Atômico Bariloche - 8400 San Carlos de Bariloche, Rio Negro, Argentina

(Received 10 December 2002; accepted in final form 20 June 2003)

We study the resistive transition in Josephson-junction arrays at f=1/2 flux quantum per plaquette by dynamical simulations of the resistively-shunted-junction model. The current-voltage scaling and critical dynamics of the phases are found to be well described by the same critical temperature and static exponents as for the chiral (vortex-lattice) transition. Although this behavior is consistent with a single-transition scenario, where phase and chiral variables order simultaneously, two different dynamic exponents result for phase coherence and chiral order.

74.81.Fa - Josephson junction arrays and wire networks.
64.60.Cn - Order-disorder transformations; statistical mechanics of model systems.
74.25.Qt - Vortex lattices, flux pinning, flux creep.

© EDP Sciences 2003