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Communication: Fast dynamics perspective on the breakdown of the Stokes-Einstein law in fragile glassformers
- Source :
- Journal of Chemical Physics, Journal of Chemical Physics, American Institute of Physics, 2018, 148 (13), ⟨10.1063/1.5025614⟩
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- The breakdown of the Stokes-Einstein (SE) law in fragile glassformers is examined by Molecular-Dynamics simulations of atomic liquids and polymers and consideration of the experimental data concerning the archetypical ortho-terphenyl glassformer. All the four systems comply with the universal scaling between the viscosity (or the structural relaxation) and the Debye-Waller factor < u(2)>, the mean square amplitude of the particle rattling in the cage formed by the surrounding neighbors. It is found that the SE breakdown is scaled in a master curve by a reduced < u(2)>. Two approximated expressions of the latter, with no and one adjustable parameter, respectively, are derived. Published by AIP Publishing.
- Subjects :
- Physics
Physics and Astronomy (all)
Physical and Theoretical Chemistry
010304 chemical physics
Dynamics (mechanics)
General Physics and Astronomy
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Condensed Matter::Disordered Systems and Neural Networks
Condensed Matter::Soft Condensed Matter
Viscosity
Amplitude
Perspective (geometry)
Stokes einstein
Law
0103 physical sciences
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Relaxation (physics)
Particle
0210 nano-technology
Scaling
Subjects
Details
- Language :
- English
- ISSN :
- 00219606 and 10897690
- Database :
- OpenAIRE
- Journal :
- Journal of Chemical Physics, Journal of Chemical Physics, American Institute of Physics, 2018, 148 (13), ⟨10.1063/1.5025614⟩
- Accession number :
- edsair.doi.dedup.....470b5df50bd58277cd51f88353876035