| Issue |
Europhys. Lett.
Volume 75, Number 5, September 2006
|
|
|---|---|---|
| Page(s) | 784 - 790 | |
| Section | Condensed matter: structural, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2006-10175-8 | |
| Published online | 28 July 2006 | |
Are there localized saddles behind the heterogeneous dynamics of supercooled liquids?
1
Dipartimento di Fisica Teorica, Università di Trieste - Strada Costiera 11 34100 Trieste, Italy
2
CNR-INFM Democritos National Simulation Center - Via Beirut 2-4 34014 Trieste, Italy
Corresponding authors: coslo@ts.infn.it pastore@ts.infn.it
Received:
15
May
2006
Accepted:
13
July
2006
We numerically study the interplay between heterogeneous dynamics and properties of negatively curved regions of the potential energy surface in a model glassy system. We find that the unstable modes of saddles and quasi-saddles undergo a localization transition close to the Mode-Coupling critical temperature. We also find evidence of a positive spatial correlation between clusters of particles having large displacements in the unstable modes and dynamical heterogeneities.
PACS: 64.70.Pf – Glass transitions / 61.20.Lc – Time-dependent properties; relaxation / 61.20.Ja – Computer simulation of liquid structure
© EDP Sciences, 2006
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