Short-time dynamic behavior of the two-dimensional square lattice fully frustrated XY model

The short-time dynamic behavior of the two-dimensional fully frustrated XY model on a square lattice with ferromagnetic and antiferromagnetic couplings arranged in a zigzag pattern near the critical temperature is investigated. The Ising-like phase transition temperature T-c and all the static and dynamic critical exponents 2beta/v, v and z are determined for two definitions of order parameter: the staggered chiral magnetization Mchi and the staggered magnetization M-st. We find that T-c, 2beta/v and z are almost independent of the definition of order parameter: T-c = 0.4544(2), 2beta/v = 0.265(4) and z = 2.24(3) for Mchi while they are 0.4546(2), 0.274(4) and 2.25(3) for M-st, respectively. But v depends on the definition of order parameter, v = 0.813(13) for Mchi while it is 0.862(16) for M-st. (C) 2002 Elsevier Science B.V. All rights reserved.