Field-induced dynamic phase transition in the Ising antiferromagnet on thetriangular lattice

We study the spreading of damage D(t) in the antiferromagnetic Ising model on a triangular lattice in the presence of a magnetic field by using Glaube r dynamics. Although the damage spreads (chaotic behavior) for all finite v alues of the field and temperature, there are two distinct field-temperatur e dependent chaotic regions: one where the final damage depends on its init ial value D(0) and the other one which has the same final damage for all fi nite values of D(0). The dynamical critical line separating these regions c oincides, within the precision limits of the present calculation, with the order-disorder critical frontier of the model obtained by a Monte-Carlo sim ulation. (C) 2001 Elsevier Science B.V. All rights reserved.