X-ray photoelectron spectra of Ge-As-Te glasses

Abstract

ARTICLES YOU MAY BE INTERESTED INComparison of measured pinch parameters versus pressure for SABALAN1 plasma focus facility against computed values using Lee model code AIP Advances 8, 075209 (2018) Ternary Ge 10 As x Te 90-x glasses with a mean coordination number (MCN) from 2.3 to 2.8 were prepared, and their physical and structural properties were characterized. It was found that, the density of the glass decreases but glass transition temperature T g increases, and the near infrared transmission edge shifts to shorter wavelength with increasing As content. The Ge, As, and Te 3d spectra were decomposed into different doublets that correspond to different structural units and the results showed that, the numbers of Te-Te-Te trimmers and Te-Te-As(Ge) structural units decrease and finally disappear, while the perfect AsTe 3/2 pyramidal and GeTe 4/2 tetrahedral structure in Te-rich samples gradually transferred to defect structures including As-As and Ge-Ge homopolar bonds with increasing As concentration. No threshold behaviour can be found in the structural evolution of Ge 10

Investigation of the acousto‐optical properties of Ge–As–Te–(Se) chalcogenide glasses at 10.6 μm wavelength

“…Hence, the T g and T x of glasses gradually decreased with the increased Te content. Although the coordination number of Te is larger than that of As, the topological order of the glasses was actually suppressed 47 . Therefore, the network topology of Ge–As–Te glasses transformed from floppy to rigid with decreased Te content, and their E and G increased subsequently.…”

“…Although the coordination number of Te is larger than that of As, the topological order of the glasses was actually suppressed. 47 Therefore, the network topology of Ge-As-Te glasses transformed from floppy to rigid with decreased Te content, and their E and G increased subsequently. Moreover, heavy Te atoms mean that the vibration frequencies of Ge-Te and As-Te bonds are lower than those of Ge-Se and As-Se bonds, and Te atoms tend to be polarized easily.…”