Polyamorphism in Yb-based metallic glass induced by pressure

Polyamorphism of a Ce-based bulk metallic glass by high-pressure and high-temperature density measurements

Simulation of pressure-induced polyamorphism in a chalcogenide glass GeSe2

The pressure-induced insulator-metal transition in amorphous GeSe2 (a-GeSe2) is studied using an ab initio constant pressure molecular-dynamic simulation. a-GeSe2 transforms gradually to an amorphous metallic state under the application of pressure. The transition is reversible, and is associated with a gradual change from fourfold to sixfold Ge coordination, and from twofold to fourfold Se coo...

Liquid-Liquid Phase Transition and Glass Transition in a Monoatomic Model System

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 a...

Ultrahigh-pressure polyamorphism in GeO2 glass with coordination number >6.

Knowledge of pressure-induced structural changes in glasses is important in various scientific fields as well as in engineering and industry. However, polyamorphism in glasses under high pressure remains poorly understood because of experimental challenges. Here we report new experimental findings of ultrahigh-pressure polyamorphism in GeO2 glass, investigated using a newly developed double-sta...

Pressure effects on Ca60Al40 metallic glass superconductors

Theoretical computation of the pressure dependence superconducting state parameters of binary Ca60Al40 is reported using model potential formalism. Explicit expressions have been derived for the volume dependence of the electron–phonon coupling strength λ and the Coulomb pseudopotential μ* considering the variation of Fermi momentum KF and Debye temperature ӨD with volume. Well known Ashcroft’s...