Regensburg 2004 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 12: Dynamical Phenomena
DY 12.1: Vortrag
Montag, 8. März 2004, 11:30–11:45, H2
Out-of-equilibrium critical dynamics at surfaces: Cluster dissolution and non-algebraic correlations — •Michel Pleimling1 and Ferenc Iglói2,3 — 1Institut für Theoretische Physik I, Universität Erlangen-Nürnberg, D-91058 Erlangen — 2Research Institute for Solid State Physics and Optics, P.O.Box 49, H-1525 Budapest — 3Institute of Theoretical Physics, Szeged University, H-6720 Szeged
We study nonequilibrium dynamical properties at free surfaces after the system is quenched from the high-temperature phase into the critical point. We show that if the spatial surface correlations decay sufficiently rapidly the surface magnetization and/or the surface manifold correlations have a qualitatively different universal short time behavior than the same quantities in the bulk. At a free surface cluster dissolution may take place instead of domain growth and as a result dynamical correlations decay in a non-algebraic, stretched exponential form. This phenomenon takes place in the three-dimensional Ising model and should be observable in real ferromagnets.