Super-Arrhenius behavior of molecular glass formers
نویسندگان
چکیده
منابع مشابه
A new interpretation of dielectric data in molecular glass formers.
Literature dielectric data of glycerol, propylene carbonate, and ortho-terphenyl show that the measured dielectric relaxation is a decade faster than the Debye expectation but still a decade slower than the breakdown of the shear modulus. From a comparison of time scales, the dielectric relaxation seems to be due to a process which relaxes not only the molecular orientation but also the entropy...
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We introduce a coarse-grained model for atomic glass formers. Its elements are physically motivated local microscopic dynamical rules parameterized by observables. Results of the model are established and used to interpret the measured behaviors of supercooled fluids approaching glass transitions. The model predicts the presence of a crossover from hierarchical super-Arrhenius dynamics at short...
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The variation with respect to temperature T of transport properties of 58 fragile structural glass-forming liquids (67 data sets in total) are analyzed and shown to exhibit a remarkable degree of universality. In particular, super-Arrhenius behaviors of all supercooled liquids appear to collapse to one parabola for which there is no singular behavior at any finite temperature. This behavior is ...
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The earlier paper of this same title demonstrated a collapse of relaxation data of fragile supercooled glass forming liquids [J. Phys. Chem. B 2009, 113, 5563-5567]. For temperature T below that of the onset to supercooled behavior, T(o), the logarithm of structural relaxation time, log τ, is given by the parabolic form log(τ/τ(o)) = J(2)(1/T - 1/T(o))(2), where J and τ(o) are temperature-indep...
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F. J. Bermejo, W. S. Howells, M. Jiménez-Ruiz, M. A. González, D. L. Price, M. L. Saboungi, and C. Cabrillo Department of Electricity and Electronics, University of Basque Country, P.O. Box 644, Bilbao 48080, Spain Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientı́ficas, Serrano 123, E-28006 Madrid, Spain ISIS Facility, Rutherford Appleton Laboratory, Chilton, Did...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2019
ISSN: 2470-0045,2470-0053
DOI: 10.1103/physreve.99.030101