Regensburg 2013 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 8: Poster I: Glasses and Glass Transition (joint session DY/DF/CPP)
DY 8.12: Poster
Montag, 11. März 2013, 17:30–19:30, Poster C
Glassy dynamics of orientation fluctuations in modulated phases — •Christian Riesch, Günter Radons, and Robert Magerle — Institut für Physik, Technische Universität Chemnitz, D-09107 Chemnitz
We report on glassy dynamics and aging behavior in a 2D stripe-forming system free of topological defects. Numerical simulations based on model B with Coulomb interactions were performed for a wide range of noise strengths. The autocorrelation function of the local stripe orientation obeys the scaling form Cθ(t,tw)∼ tw−b· f(t/tw), typical for glassy dynamics, and we argue that the relaxation time of the orientation fluctuations diverges. Spatial correlations are anisotropic, exhibiting a fast decay parallel to the stripes and an emerging power-law behavior in the perpendicular direction. We also investigate aging effects in other modulated phases, such as a hexagonal system in 2D and a lamellae-forming system in 3D.