Nonlinear response in strongly heterogeneous glass-forming mixtures and ion conductors

• Applicants: Professor Dr. Thomas Franosch; Professor Dr. Jürgen Horbach
• Subject Area: Statistical Physics, Nonlinear Dynamics, Complex Systems, Soft and Fluid Matter, Biological Physics
• Term: from 2010 to 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 157463299

The mass transport in strongly heterogeneous mixtures and the disordered Lorentz model is studied using non-equilibrium molecular dynamics simulations, mode-coupling theory, and scaling theory approaches. By investigating the non-linear response to external fields, we aim at revealing the fundamental microscopic processes responsible for anomalous diffusion in such systems, and to understand the connection between fast-ion-conduct ing glass-forming melts, purely entropic binary-mixture model systems, and the Lorentz gas on a theoretical basis. Both the dynamics of the mobile (tracer) particles and that of the slow particle species are considered. In particular, we address the role of collectivity in fast-ion transport and the role of correlations in the heterogeneous glass-forming matrix.

• DFG Programme: Research Units
• Subproject of: FOR 1394: Nonlinear Response to Probe Vitrification
• International Connection: Austria, United Kingdom
• Participating Person: Professor Roel Dullens, Ph.D.