Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: Poster: Glasses I (jointly with DY)

CPP 14.11: Poster

Dienstag, 27. März 2012, 18:15–20:15, Poster A

Probing a statical, critical length scale in supercooled liquids — •Ingo Füreder, Patrick Ilg, and Hans Christian Öttinger — ETH Zürich, Switzerland

Nonequilibrium molecular simulations of glassy systems pose several challenges due to their long relaxation times and the large time scale gap between micro- and macroscopic dynamics. Guided by general principles of nonequilibrium thermodynamics we develop a constitutive model which should enable us to describe the behaviour of supercooled liquids in a quantitative manner on a macroscopic scale. The building blocks of the model contain a naturally arising length scale in glassy systems being a signature of growing amorphous order near the glass transition. This length is associated with the hindrance of affine deformations of an inherent structure configuration and could be extracted by investigating the system's non-affine response to static shear.