Universal elastic and plastic effects in the particle caging of polymers and glassforming liquids

Details Universal elastic and plastic effects in the particle caging of polymers and glassforming liquids Universal elastic and plastic effects in the particle caging of polymers and glassforming liquids

2011-08-23

arxiv.org/abs/1108.4629v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 3 figures

Scientific paper

The peculiar intermittency of the single-particle motion close to the glass transition follows from the continuous (elastic) trapping into the neighbors cage and the subsequent (plastic) escape. The universal correlation of the residual elasticity and the incipient plasticity on the picosecond time scale with the cage restructuring is revealed by extensive simulations and validated by comparison with experimental data spanning about eighteen decades in relaxation time and a wide range of fragilities. Universality is lost on sub-picosecond time scales where the elastic energy due to non-affine microscopic displacements is still stored.

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