2005
DOI: 10.1103/physrevb.71.014210
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Scaling of the supercooled dynamics and its relation to the pressure dependences of the dynamic crossover and the fragility of glass formers

Abstract: Master curves of the relaxation time, τ, or viscosity, η, versus T -1 V -γ , where T is temperature, V the specific volume, and γ a material constant, are used to deduce the effect of pressure on the dynamic crossover and the fragility. The crossover is determined from the change in slope of derivative plots of the relaxation times or viscosities. We confirm our previous findings that the value of τ or η at the crossover is independent of both T and P; that is, the dynamic crossover is associated with a charac… Show more

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Cited by 157 publications
(199 citation statements)
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“…is a constant independent of P. In fact, experimental results show unambiguously that m P decreases with increasing P 28,62,63,64 .…”
mentioning
confidence: 76%
See 1 more Smart Citation
“…is a constant independent of P. In fact, experimental results show unambiguously that m P decreases with increasing P 28,62,63,64 .…”
mentioning
confidence: 76%
“…The present prediction that m P decreases with pressure agrees with the general experimental result for non-associated glass-formers, dm P /dP < 0. 64 (Associated liquids, e.g., water, for which α P <0 or α P =0 may exhibit other behavior. Since the equation of the original model is the same as eq.…”
Section: Test Of the Modelmentioning
confidence: 99%
“…Developing an empirical scaling of transport in this regime has attracted attention, most notably in a series of works by Casalini and Roland 10,11,12,13,14 . The shape of the repulsive and attractive forces clearly must matter in the supercooled regime.…”
Section: Introductionmentioning
confidence: 99%
“…Thermodynamic properties of the soft-sphere model can be derived using the Klein theorem [16][17][18] , but the solution for the kinetic properties will be more complicated. Taking into account a direct analogy 10,19 sometimes supported by deeper theoretical consideration 17,18,20,21 , one may write a scaling relationship for the characteristic time of the structural relaxation (also known as α-relaxation) τ in the form:…”
Section: Introductionmentioning
confidence: 99%
“…As far as we know, there were only a few attempts to study the glass transition by ultrasonic techniques under pressure (e.g., in glycerol 43 ) in contrast to the high-pressure applications of dielectric spectroscopy (see [10][11][12][13][14]19 and references therein) and viscosity measurements (e.g., Refs. 15 and 32 and references therein).…”
Section: Introductionmentioning
confidence: 99%