Dynamical process for switching between the metastable ordered magnetic state and the nonmagnetic ground state in a photoinduced phase transition - art. no. 174404
M. Nishino et S. Miyashita, Dynamical process for switching between the metastable ordered magnetic state and the nonmagnetic ground state in a photoinduced phase transition - art. no. 174404, PHYS REV B, 6317(17), 2001, pp. 4404
We propose a dynamical mechanism for the two-way switching between the meta
stable state and the stable state, which has been found in experiments of p
hotoinduced reversible magnetization and photoinduced structural phase tran
sitions. We find that the two-way switching by a nonsymmetry-breaking pertu
rbation such as illumination is possible only in systems with appropriate p
arameters. We investigate the relaxation dynamics with two kinds of transit
ion probabilities by a mean-field theory and a Monte Carlo method. We make
it clear that the existence of two time scales in the dynamical process is
important for the two-way switching and we actually demonstrate stable two-
way switching.