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Qualitative features at the glass crossover

Rizzo, T. and Voigtmann, Th. (2015) Qualitative features at the glass crossover. Europhysics Letters, 111, p. 56008. EPLA. DOI: 10.1209/0295-5075/111/56008 ISSN 0295-5075

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Abstract

We discuss generic features of the dynamics of glass-forming liquids close to the glass transition singularity of the idealized mode-coupling theory (MCT). The analysis is based on a recent theory by one of the authors for the intermediate-time dynamics ($\beta$ relaxation), derived by applying dynamical field-theory techniques to the idealized MCT. Taking the long-time asymptote of the $\beta$-relaxation regime as a proxy for universal aspects of the slow structural ($\alpha$) relaxation, we explain three prominent features of the dynamical crossover: the change from a power-law to exponential increase in the structural relaxation time, the replacement of the Stokes-Einstein relation between diffusion and viscosity by a fractional law, and two distinct growth regimes of the thermal susceptibility that has been associated to dynamical heterogeneities.

Item URL in elib:https://elib.dlr.de/99742/
Document Type:Article
Title:Qualitative features at the glass crossover
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rizzo, T.Universita di Roma IUNSPECIFIED
Voigtmann, Th.thomas.voigtmann (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:Europhysics Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:111
DOI :10.1209/0295-5075/111/56008
Page Range:p. 56008
Publisher:EPLA
ISSN:0295-5075
Status:Published
Keywords:mode coupling theory, glass transition, replica theory
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Voigtmann, Dr.rer.nat. Thomas
Deposited On:24 Nov 2015 09:24
Last Modified:10 Jan 2019 15:47

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