Local Dynamical Heterogeneity in Simple Glass Formers.
Phys Rev Lett
; 128(17): 175501, 2022 Apr 29.
Article
en En
| MEDLINE
| ID: mdl-35570461
ABSTRACT
We study the local dynamical fluctuations in glass-forming models of particles embedded in d-dimensional space, in the mean-field limit of dâ∞. Our analytical calculation reveals that single-particle observables, such as squared particle displacements, display divergent fluctuations around the dynamical (or mode-coupling) transition, due to the emergence of nontrivial correlations between displacements along different directions. This effect notably gives rise to a divergent non-Gaussian parameter, α_{2}. The dâ∞ local dynamics therefore becomes quite rich upon approaching the glass transition. The finite-d remnant of this phenomenon further provides a long sought-after, first-principle explanation for the growth of α_{2} around the glass transition that is not based on multiparticle correlations.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2022
Tipo del documento:
Article
País de afiliación:
Francia