Nonequilibrium critical dynamics in inhomogeneous systems

Michel Pleimling, Ferenc Iglói

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We study nonequilibrium dynamical properties of inhomogeneous systems, in particular at a free surface or at a defect plane. Thereby we consider nonconserved (model-A) dynamics of a system which is prepared in the high-temperature phase and quenched into the critical point. Using Monte Carlo simulations we measure single spin relaxation and autocorrelations, as well as manifold autocorrelations and persistence. We show that, depending on the decay of critical static correlations, the short time dynamics can be of two kinds. For slow decay of local correlations the usual domain growth process takes place with nonstationary and algebraic dynamical correlations. If, however, the local correlations decay sufficiently rapidly we have the so-called cluster dissolution scenario, in which case short time dynamical correlations are stationary and have a universal stretched exponential form. This latter phenomenon takes place in the surface of the three-dimensional Ising model and should be observable in real ferromagnets.

Original languageEnglish
Article number094424
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number9
DOIs
Publication statusPublished - Mar 1 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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