What can we learn by squeezing a liquid

Details What can we learn by squeezing a liquid What can we learn by squeezing a liquid

2006-01-17

arxiv.org/abs/cond-mat/0601377v1

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 4 figures

Scientific paper

Relaxation times for different temperatures, T, and specific volumes, V, collapse to a master curve versus TV^g, with g a material constant. The isochoric fragility, m_V, is also a material constant, inversely correlated with g. From these we obtain a 3-parameter function, which fits accurately relaxation times of several glass-formers over the supercooled regime, without any divergence below Tg. Although the 3 parameters depend on the material, only g significant varies; thus, by normalizing material-specific quantities related to g, a universal power law for the dynamics is obtained.

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