Amorphous to amorphous transition in particle rafts

Amorphous to amorphous insulator-metal transition in GeSe3:Ag glasses

We study an insulator-metal transition in a ternary chalcogenide glass (GeSe3)1−xAgx for x = 0.15 and 0.25. The conducting phase of the glass is obtained by using gap sculpting [Prasai et al., Sci. Rep. 5, 15522 (2015)] and it is observed that the metallic and insulating phases have nearly identical density functional energies but have a conductivity contrast of ∼108. As such, we demonstrate an...

Universal amorphous-amorphous transition in GexSe100−x glasses under pressure

Pressure induced structural modifications in vitreous GexSe100-x (where 10 ≤ x ≤ 25) are investigated using X-ray absorption spectroscopy (XAS) along with supplementary X-ray diffraction (XRD) experiments and ab initio molecular dynamics (AIMD) simulations. Universal changes in distances and angle distributions are observed when scaled to reduced densities. All compositions are observed to rema...

Crystallization Kinetics Study in Al87Ni10La3 Amorphous Alloy

In this study, the crystallization behavior of melt-spun Al87Ni10La3 amorphous phase was investigated by using X-ray diffraction and non-isothermal differential thermal analysis techniques. The results demonstrated that the amorphous phase exhibited two-stage crystallization on heating, i.e., at first step the amorphous phase transforms into α-Al phase and at second step Al11La3 and Al3Ni inter...

Ab initio simulation of first-order amorphous-to-amorphous phase transition of silicon

The pressure-induced phase transition in amorphous silicon ~a-Si! is studied using ab initio constantpressure molecular-dynamic simulations. Crystalline silicon ~c-Si! shows a phase transformation from diamond-to-simple hexagonal at 29.5 GPa, whereas a-Si presents an irreversible sharp transition to an amorphous metallic phase at 16.25 GPa. The transition pressure of a-Si is also calculated fro...

Multiple Amorphous–amorphous Transitions