Trachenko, K. and Brazhkin, V. V. (2008) Liquid elasticity length, universal dynamic crossovers, and glass transition. Journal of Physics: Condensed Matter, 20 (7). 075103. DOI https://doi.org/10.1088/0953-8984/20/7/075103
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Abstract
We discuss two main universal dynamic crossovers in a liquid that correspond to relaxation times of 1 ps and 10−7–10−6 s. We introduce the concept of liquid elasticity length del. At room temperature, del is several Å in water and increases to 0.01 mm in honey and 1 mm in tar. We discuss that on temperature decrease, del = dm and del = L correspond to the two dynamic crossovers, where dm is the medium-range order and L is system size. In this picture, the two important changes in the dynamics of a system are defined by its fundamental lengths. The second crossover defines all kinetic aspects of the glass transition, whereas the 'thermodynamic' glass transition is realized in the limit of infinite system size only. In this picture, we also discuss the division of liquids into strong and fragile. One prediction of our theory is the increase of viscosity with the size of macroscopic system, which we verify by measuring the viscosity of honey.
Item Type: | Article |
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Uncontrolled Keywords: | 2007 AREP IA55 2008 P kot; |
Subjects: | 03 - Mineral Sciences |
Divisions: | 03 - Mineral Sciences |
Journal or Publication Title: | Journal of Physics: Condensed Matter |
Volume: | 20 |
Page Range: | 075103 |
Identification Number: | https://doi.org/10.1088/0953-8984/20/7/075103 |
Depositing User: | Sarah Humbert |
Date Deposited: | 16 Feb 2009 13:03 |
Last Modified: | 23 Jul 2013 10:08 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/745 |
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