6533b82bfe1ef96bd128e003

RESEARCH PRODUCT

Heterogeneity at the glass transition: what do we know?

Gregor DiezemannHans SillescuGerald HinzeRoland Böhmer

subject

Length scaleLiquid stateCondensed matter physicsChemistryMaterials ChemistryCeramics and CompositesSpin echoLife timeDynamical heterogeneityCondensed Matter PhysicsGlass transitionSpectroscopyElectronic Optical and Magnetic Materials

description

We critically discuss the information that can be obtained from experiments with respect to the existence, the life time, and the length scale of dynamical heterogeneity in glass-forming liquids. The ability to select a dynamically distinguishable subensemble and observe its return to the full equilibrium ensemble is illustrated by examples from multi-dimensional NMR. We also discuss non-resonant hole burning spectroscopy as an example for which two separate time scales are involved.

https://doi.org/10.1016/s0022-3093(02)01435-7