A simple spin model for three steps relaxation and secondary proccesses in glass formers
arXiv:1405.6832 · doi:10.1016/j.jnoncrysol.2014.07.048
Abstract
A number of general trends are known to occur in systems displaying secondary processes in glasses and glass formers. Universal features can be identified as components of large and small cooperativeness whose competition leads to excess wings or apart peaks in the susceptibility spectrum. To the aim of understanding such rich and complex phenomenology we analyze the behavior of a model combining two apart glassy components with a tunable different cooperativeness. The model salient feature is, indeed, based on the competition of the energetic contribution of groups of dynamically relevant variables, e.g., density fluctuations, interacting in small and large sets. We investigate how the model is able to reproduce the secondary processes physics without further ad hoc ingredients, displaying known trends and properties under cooling or pressing.
11 Pages, 11 Figures
References in corpus (8)
- Nearly-logarithmic decay of correlations in glass-forming liquids
- High-frequency dynamics of type-B glass formers investigated by broadband dielectric spectroscopy
- Amorphous-amorphous transition and the two-step replica symmetry breaking phase
- Spin-Glass Model for Inverse Freezing
- Comment on ``Spherical 2 + p spin-glass model: An analytically solvable model with a glass-to-glass transition''
- On Equilibrium Dynamics of Spin-Glass Systems
- Reply to Comment on ``Spherical 2+p spin-glass model: an analytically solvable model with a glass-to-glass transition''
- Static and dynamic glass-glass transitions: a mean-field study