Correlation between dynamical heterogeneities, structure and potential-energy distribution in a 2D amorphous solid
Fachbereich Physik, Universität Konstanz, D-78457, Konstanz, Germany
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Revised: 19 July 2011
Accepted: 15 August 2011
Published online: 26 September 2011
We investigate the collective properties of particles in a 2D experimental system which consists of a bi-disperse mixture of colloidal particles confined at an air/water interface. We find a direct correlation between structure and dynamical heterogeneities in this system: particles belonging to locally ordered structures have lower potential energy and are slower than other particles. In a more general way we show that particles with high potential energy are dominating the dynamics especially in the α-relaxation regime.
© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011