What do we learn from the local geometry of glass-forming liquids?

Details What do we learn from the local geometry of glass-forming liquids? What do we learn from the local geometry of glass-forming liquids?

2002-06-08

arxiv.org/abs/cond-mat/0206121v1

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevLett.89.125501

We examine the local geometry of a simulated glass-forming polymer melt. Using the Voronoi construction, we find that the distributions of Voronoi volume $P(v_V)$ and asphericity $P(a)$ appear to be universal properties of dense liquids, supporting the use of packing approaches to understand liquid properties. We also calculate the average free volume $$ along a path of constant density and find that $$ extrapolates to zero at the same temperature $T_0$ that the extrapolated relaxation time diverges. We relate $$ to the Debye-Waller factor.

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