Anomalous dynamics in glassy materials: from (bio)colloidal gels to metallic glasses
Luca Cipelletti (L2C, Montpellier)
| Quand ? |
Le 02/03/2015, de 11:00 à 12:30 |
|---|---|
| Où ? | Salle Fontaine |
| Participants |
Luca Cipelletti |
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The dynamics of gels formed by strongly attractive colloidal particles exhibit very peculiar behavior: correlation functions measured by scattering methods decay steeper than exponentially (as opposed to the stretched exponential typically observed in glassy systems), and particle motion is ballistic (as opposed to the more usual diffusive behavior). Quite remarkably, over the last years the same behavior has been observed in a large variety of systems, including concentrated emulsions, foams, surfactant phases, actin networks and even hard condensed matter systems such as molecular or metallic glass formers. In this seminar, I'll review these experiments and discuss current models, based on the relaxation of internal stresses.