Issue |
Europhys. Lett.
Volume 51, Number 4, August II 2000
|
|
---|---|---|
Page(s) | 420 - 426 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2000-00511-0 | |
Published online | 01 September 2002 |
Quantitative investigation of the mean-field scenario for the structural glass transition from a schematic mode-coupling analysis of experimental data
LCP,UMR 8611, Bâtiment 490, Université Paris Sud - F-91405 Orsay
Corresponding authors: krako@lcp.u-psud.fr chalba@lcp.u-psud.fr
Received:
3
January
2000
Accepted:
8
June
2000
A quantitative application to real supercooled liquids of the mean-field
scenario for the glass transition () is proposed. This scenario,
based on an analogy with spin-glass models, suggests a unified picture
of the mode-coupling dynamical singularity (
) and of the entropy
crisis at the Kauzmann temperature (
), with
. Fitting
a simple set of mode-coupling equations to experimental light-scattering
spectra of two fragile liquids and deriving the equivalent spin-glass
model, we can estimate not only
, but also the static transition
temperature
corresponding supposedly to
. For the models and
systems considered here,
is always found above
, in the fluid
phase. A comparison with recent theoretical calculations shows that this
overestimation of the ability of a liquid to form a glass seems to be a
generic feature of the mean-field approach.
PACS: 64.70.Pf – Glass transitions / 61.20.Lc – Time-dependent properties; relaxation / 75.10.Nr – Spin-glass and other random models
© EDP Sciences, 2000
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