Landscape equivalent of the shoving model

Details Landscape equivalent of the shoving model Landscape equivalent of the shoving model

2002-11-04

arxiv.org/abs/cond-mat/0211042v4

Phys. Rev. E 69, 042501 (2004)

Physics

Condensed Matter

Soft Condensed Matter

4 pages

Scientific paper

10.1103/PhysRevE.69.042501

It is shown that the shoving model expression for the average relaxation time of viscous liquids follows largely from a classical "landscape" estimation of barrier heights from curvature at energy minima. The activation energy involves both instantaneous bulk and shear moduli, but the bulk modulus contributes less than 8% to the temperature dependence of the activation energy. This reflects the fact that the physics of the two models are closely related.

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