Abstract
We review our recent study on the polyamorphism of the liquid and glass states in a monatomic system, a two-scale spherical-symmetric Jagla model with both attractive and repulsive interactions. This potential with a parametrization for which crystallization can be avoided and both the glass transition and the liquid-liquid phase transition are clearly separated, displays water-like anomalies as well as polyamorphism in both liquid and glassy states, providing a unique opportunity to study the interplay between the liquid-liquid phase transition and the glass transition. Our study on a simple model may be useful in understanding recent studies of polyamorphism in metallic glasses.
Highlights
The phenomenon of polyamorphism of a single-component system has been receiving a considerable attention [1,2,3] since the observation of two or more distinct glasses in water [4,5,6,7,8,9,10,11,12]
We focus on the relation between a liquid-liquid phase transition and the thermodynamic and dynamic properties [25,30,62,65,76,77,78]
We have discussed the phase transformations in the Jagla model, which was parametrized in order to show polyamorphism at high temperature in the equilibrium liquid phase
Summary
The phenomenon of polyamorphism of a single-component system has been receiving a considerable attention [1,2,3] since the observation of two or more distinct glasses in water [4,5,6,7,8,9,10,11,12]. To what was observed for the thermodynamic properties, we see a sharp transition, from those resembling the LDL phase to those resembling the HDL phase when the system crosses the Widom line, in the translational t (Figure 4(a)) and orientational order parameters Q6 (Figure 4(b)). These sharp changes in t and Q6 becomes more pronounced as the path is closer to the critical pressure.
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