Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 22: Posters I

DY 22.46: Poster

Mittwoch, 28. März 2012, 17:00–19:00, Poster A

Glassy dynamics of kinks in stripe phases — •Christian Riesch, Günter Radons, and Robert Magerle — Institut für Physik, Technische Universität Chemnitz, D-09107 Chemnitz, Germany

The formation of stripes can be observed in many physical systems, including block copolymers, thin magnetic films and Rayleigh-Bénard convection. We investigate numerically the dynamics of two well-known models of stripe formation, the diblock copolymer equation and the Swift-Hohenberg equation. The systems are prepared in an ordered initial state consisting of parallel stripes, which is then subjected to thermal fluctuations during the simulation. We find that already a small amount of noise is sufficient to induce a characteristic glassy dynamics, which is revealed in time correlation functions of the local stripe orientation as well as the local curvature. We attribute this glassy behavior to the fluctuation of kinks in the stripes. Both correlation functions are found to scale as C(t,tw )∼ twb· f(t/tw), a scaling form commonly found in other glass-forming systems.

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DPG-Physik > DPG-Verhandlungen > 2012 > Berlin