OVERSHOOTING EFFECTS IN NONEQUILIBRIUM ORDERING DYNAMICS

Using Monte Carlo simulation on the simplest possible statistical mech anical model, the two-dimensional, nonconserved kinetic Ising model th at undergoes an order-disorder transition, we show that the local orde r of the ordering domains, subsequent to a temperature quench, transie ntly overshoots the value of the equilibrium order parameter. It is ar gued that overshooting is a generic effect in ordering dynamics, indep endent of the detailed dynamics and the conservation laws in effect.