Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1482133 | Journal of Non-Crystalline Solids | 2011 | 7 Pages |
Abstract
The dynamics of a tracer particle in a glassy matrix of obstacles displays slow complex transport as the free volume approaches a critical value and the void space falls apart. We investigate the emerging subdiffusive motion of the test particle by extensive molecular dynamics simulations and characterize the spatio-temporal transport in terms of two-time correlation functions, including the time-dependent diffusion coefficient, the frequency-dependent conductivity, as well as the wavenumber-dependent intermediate scattering function. We rationalize our findings within the framework of critical phenomena and compare our data to a dynamic scaling theory.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Thomas Franosch, Markus Spanner, Teresa Bauer, Gerd E. Schröder-Turk, Felix Höfling,