منابع مشابه
namics of supercooled liquids ?
Europhysics Letters PREPRINT Are there localized saddles behind the heterogeneous dynamics of supercooled liquids? Abstract. – We numerically study the interplay between heterogeneous dynamics and properties of negatively curved regions of the potential energy surface in a model glassy system. We find that the unstable modes of saddles and quasi-saddles undergo a localization transition close t...
متن کاملMechanics of Supercooled Liquids
Pure substances can often be cooled below their melting points and still remain in the liquid state. For some supercooled liquids, a further cooling slows down viscous flow greatly, but does not slow down self-diffusion as much. We formulate a continuum theory that regards viscous flow and self-diffusion as concurrent, but distinct, processes. We generalize Newton’s law of viscosity to relate s...
متن کاملSupercooled Liquids and Glasses
Glasses are materials that are much more common in our daily life than one might naively expect. Apart from the obvious (inorganic) glasses, such as wine glasses, bottles and windows, we also have the organic (often polymeric) glasses, such as most plastic materials (bags, coatings, etc.). In the last few years also metallic glasses have come to our daily (St. Andrews) life since they are used,...
متن کاملSupercooled Liquids and Polyamorphism
We have discovered a solid, apparently amorphous phase of triphenyl phosphite to which the supercooled liquid converts, a phase distinct from both the glass and the crystal. To date, this is the clearest and best identified case of a first-order transition from a liquid to another apparently amorphous condensed phase. We discuss this phenomenon in terms of a recently formulated theory of superc...
متن کاملComputing the viscosity of supercooled liquids.
We describe an atomistic method for computing the viscosity of highly viscous liquids based on activated state kinetics. A basin-filling algorithm allowing the system to climb out of deep energy minima through a series of activation and relaxation is proposed and first benchmarked on the problem of adatom diffusion on a metal surface. It is then used to generate transition state pathway traject...
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry A
سال: 2011
ISSN: 1089-5639,1520-5215
DOI: 10.1021/jp1060057