As2Te3 glass under high hydrostatic pressure: Polyamorphism, relaxation, and metallization

Abstract

High-precision measurements of the specific volume and electrical resistivity of As 2 Te 3 glasses are performed under hydrostatic pressures up to 8.5 GPa. A smooth transformation and logarithmic relaxation of the density is observed at pressures higher than 1 GPa. The softening of the effective bulk modulus and the relaxation rate have a sharp maximum at 2.5 GPa, which is

Memory versus irreversibility in the thermal densification of amorphous glasses

“…However, if pressure is relieved before local reconstruction occurs, slow rarefaction should be observed just as in the case of the ∆T scenario. This slow recovery has indeed been observed in a number of high-pressure studies [8,9,13].…”

“…There is comprehensive literature on pressure-induced densification studies spread over almost seven decades and involving more than ten different materials [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

“…Yet, even a minor volume difference may induce a conspicuous and sometime dramatic change of a measured property of the material. Structural glasses, on the other hand, often show considerable volume change ∆V under pressure; relative volume shrinkage ∆V/V exceeding 15% was observed in a number of studies [1][2][3][4][5][6][7][8][9][10][11][12][13]. Glasses are often amorphous structures, namely solids that lack long-range spatial order, and it is this group of glasses that is addressed in this paper.…”

Short range order and network connectivity in amorphous AsTe3: a first principles, machine learning, and XRD study

“…29 In the case of As 2 Te 3 , diffraction data showed the presence of a FSDP in the amorphous phase. 73 However, it appears from our results that while a small shoulder for k ranging from 1 to 1.4 Å −1 is present in the case of the FPMD model of AsTe 3 (see panel in Figure 3), the ML-GAP model does not show any distinguishable feature around 1 Å −1 . The absence of a relevant FSDP reveals that the IRO is very limited in amorphous AsTe 3 .…”

Monolayer AsTe2: Stable Robust Metal in 2D, 1D and 0D

“…In addition, bulk forms of group‐15 sesquichalcogenides with generic formula A 2 X 3 (A=As, Sb, Bi; X=S, Se, Te) have been widely investigated owing to their distinguishable thermoelectric properties, and 3D topological insulator character ,. Among these, several types of phases of bulk Arsenic Telluride (As 2 Te 3 ) have been widely studied . Its unique physical characteristics such as structural transformation by heat and pressure,, high power factors and low thermal conductivity, and variety multicomponent amorphous/glass‐ceramics system allowed to be used in the application of thermoelectric,,,, threshold and memory switching,, and pressure‐induced metalization .…”