How to "measure" a structural relaxation time that is too long to be measured?
arXiv:2005.06520 · doi:10.1063/5.0015227
Abstract
It has recently become possible to prepare ultrastable glassy materials characterised by structural relaxation times which vastly exceed the duration of any feasible experiment. Similarly, new algorithms have led to the production of ultrastable computer glasses. Is it possible to obtain a reliable estimate of a structural relaxation time that is too long to be measured? We review, organise, and critically discuss various methods to estimate very long relaxation times. We also perform computer simulations of three dimensional ultrastable hard spheres glasses to test and quantitatively compare some of these methods for a single model system. The various estimation methods disagree significantly and it is not yet clear how to accurately estimate extremely long relaxation times.
17 pages, 10 figures; version accepted for publication at J. Chem. Phys
References in corpus (8)
- Irreversible reorganization in a supercooled liquid originates from localised soft modes
- The glass transition of dense fluids of hard and compressible spheres
- Compressing nearly hard sphere fluids increases glass fragility
- Two-Level Systems and Boson Peak Remain Stable in 110-Million-Year-Old Amber Glass
- Revisiting the slow dynamics of a silica melt using Monte Carlo simulations
- Density controls the kinetic stability of ultrastable glasses
- Connection between fragility, mean-squared displacement and shear modulus in two van der Waals bonded glass-forming liquids
- Tracking the connection between disorder and energy landscape in glasses using geologically hyperaged amber