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Mar. 15/07/2014 10:30 Petite Ourse, Bâtiment 13, Etage 1 Séminaire
SZAMEL Grzegorz (L2C & Colorado State University)
How an accidental discovery of very large dynamic correlations lead to a new way to determine elastic modulus of amorphous solids (Physique Statistique)
Sommaire:
I will start by showing how a seemingly small change in the
definition of a quantity measuring dynamic heterogeneity
(the so-called four-point structure factor) can result in a
huge increase of dynamic correlations. I will argue that
these additional correlations are the signature of a transient
viscoelasticity. Next, I will turn to a simpler quantity, a
correlation function of time-dependent transverse particle
displacements. I will show that in a glass, the shear modulus
can be easily obtained from this function. In a glassy fluid,
the same function provides information about transient viscoelastic
response. Pour plus d'informations, merci de contacter Berthier L.
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