Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 62: Poster - Dynamics

DY 62.24: Poster

Donnerstag, 19. März 2015, 16:00–18:00, Poster A

Anisotropic Finite Size Scaling of Orientation Correlation Functions in Stripe Phases Free of Topological Defects — •Christian Riesch, Günter Radons, and Robert Magerle — Institut für Physik, Technische Universität Chemnitz, D-09107 Chemnitz

Recently, we discovered aging in the orientation dynamics of an ordered stripe-forming system in two dimensions, referred to as model B with Coulomb interactions [1]. Here, we study the influence of the aspect ratio and the size of the system on this dynamics. We find that the underlying mechanism governing the non-equilibrium evolution is the anisotropic coarsening of correlated regions within the orientation field. The spatial correlation functions perpendicular and parallel to the stripes coarsen as power laws of time with different exponents. The observed type of aging is also found in stripe phases described by the conserved and nonconserved Swift-Hohenberg model.
[1] C. Riesch, G. Radons, and R. Magerle, Aging of orientation fluctuations in stripe phases, Phys. Rev. E 90, 052101 (2014).