Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

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 Iglói^2,3 — 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.