Non-monotonic Relaxation in Systems with Reentrant Type Interaction

Details Non-monotonic Relaxation in Systems with Reentrant Type Interaction Non-monotonic Relaxation in Systems with Reentrant Type Interaction

2007-02-15

arxiv.org/abs/cond-mat/0702359v3

J. Phys. Soc. Jpn. 76 (2007) 083001

Physics

Condensed Matter

Statistical Mechanics

10pages, 8figures

Scientific paper

10.1143/JPSJ.76.083001

Recently, interesting non-monotonic time evolution has been pointed out in the experiments by J\"onsson, {\it et al.} and Jonsson {\it et.al.} and also in the numerical simulation by Takayama and Hukushima where the magnetic susceptibility does not monotonically relax to the equilibrium value, but moves to the opposite side. We study mechanism of this puzzling non-monotonic dynamical property in a frustrated Ising model in which the equilibrium correlation exhibits non-monotonic temperature dependence (reentrant type). We study the time evolution of spin correlation function after sudden change of temperature. There, we find that the value of the correlation function shows non-monotonic relaxation, and analyze mechanisms of the non-monotonicity. We also point out that competition between different configurations widely causes non-monotonic relaxation.

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