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DF: Fachverband Dielektrische Festkörper

DF 5: Glass I (joint session with DY)

DF 5.8: Vortrag

Dienstag, 27. März 2007, 12:00–12:15, H23

Continuous Time Random Walk Description of the Dynamics of a Model Glass Former — •Oliver Rubner and Andreas Heuer — Institut für Physikalische Chemie, Universität Münster

In this work we present an analysis of data obtained by simulations on a 65 particle binary Lennard-Jones Mixture (BMLJ65). We show that the dynamics of this system can be interpreted on the grounds of a Continuous Time Random Walk (CTRW) description. The basic assumptions of the CTRW model are well fulfilled and thus the picture of spatially and temporally independent jump processes between metabasins is supported.

Given the waiting time distribution of the jumps, it is then possible to deduce analytically some of the properties of the incoherent scattering function F(q,t). These predictions are compared to the numerical data and show very good agreement which supports strongly the notion of the BMLJ65-dynamics as a CTRW-process.