Project Details
Projekt
Investigation of nonlinear effects in glassy matter using dielectric methods
Subject Area
Statistical Physics, Nonlinear Dynamics, Complex Systems, Soft and Fluid Matter, Biological Physics
Term
from 2010 to 2017
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 157463299
In this project, dielectric methods will be used for the investigation of nonlinear effects by performing dielectric spectroscopy in dependence of the electric fleld and by determining the higher harmonic terms of the dielectric susceptibility. These methods shall be applied to dipolar and ionically conducting structural glass formers and also on plastic crystals. One of the main tasks is to address the non-linear behavior of excess wing and ß-relaxation, aiming at clarifying their origins by comparison with the structural α-process. Another important goal is the search for signs of a static freezing transition by exploring the temperature dependence of the non-linear susceptibility. In addition, the non-linear ionic charge transport in glass formers shall be investigated and related to theoretical predictions. The non-linearity of glassy matter will also be explored in additional experiments, where disordered matter is driven into the non-linear regime either by subjecting them to strong temperature jumps or ultrahigh pressures.
DFG Programme
Research Units
Subproject of
FOR 1394:
Nonlinear Response to Probe Vitrification
