Electronic structure of Ag7GeS5I superionic compound

Pressure-Stabilized Tin Selenide Phase with an Unexpected Stoichiometry and a Predicted Superconducting State at Low Temperatures

“…From X-ray diffraction (XRD), it was found that SnSe 2 , which is important for photoelectric applications [9], shows a second polytype with a space group of R3m [10]. On the other hand, the compound Sn 2 Se 3 has a controversial stoichiometry; it was argued that this compound is simply a superposition of SnSe and SnSe 2 [11].…”

The Effect of Substitution of Gallium on the Transport Properties of Polycrystalline GeTe

“…This observation is consistent with an earlier report where it was found that the solubility limit of Ga in GeTe is about 2 mol. % . Although most of the peaks associated with Ga 2 Te 3 phase overlap with those of R3m phase of GeTe, a distinct (200) peak around 30.35° is indicative of Ga 2 Te 3 phase as clearly apparent in the sample with x = 0.25.…”

“…%. [31] Although most of the peaks associated with Ga 2 Te 3 phase overlap with those of R3m phase of GeTe, a distinct (200) peak around 30.35 is indicative of Ga 2 Te 3 phase as clearly apparent in the sample with x ¼ 0.25. It is also noted that the prominent double peaks between 2θ ¼ 41 À 45 which are associated with trigonal distortion in GeTe do not show any merging feature with increasing dopant concentration (up to 25 mol.…”

[Ge(TenBu)4] – a single source precursor for the chemical vapour deposition of germanium telluride thin films

“…14 Crystalline germanium telluride can adopt three distinct phases, α-GeTe, β-GeTe and γ-GeTe. 1,15 β-GeTe has a rocksalt structure (Fm3m), and is found only above 630 K. 15,16 At lower temperature GeTe exists either in the rhombohedral, distorted rocksalt structure (α-GeTe, R3m) or the orthorhombic structure (γ-GeTe), with the orthorhombic structure prevalent at Te > 51.2%. 15 It is the Peierls effect that causes the distortion in the rocksalt structure to form α-GeTe and has important implications in GeTe based phase change memory.…”

“…1,15 β-GeTe has a rocksalt structure (Fm3m), and is found only above 630 K. 15,16 At lower temperature GeTe exists either in the rhombohedral, distorted rocksalt structure (α-GeTe, R3m) or the orthorhombic structure (γ-GeTe), with the orthorhombic structure prevalent at Te > 51.2%. 15 It is the Peierls effect that causes the distortion in the rocksalt structure to form α-GeTe and has important implications in GeTe based phase change memory. 17 The outcome is alternating short strong and long weak GeTe bonds aligned in the (111) plane, causing the unit cell to become elongated in this direction.…”