title: Pressure-induced disordered substitution alloy in Sb2Te3.
abstract: A new type of disordered substitution alloy of Sb and Te at above 15.1 GPa was discovered by performing in situ high-pressure angle-dispersive X-ray diffraction experiments on antimony telluride (Sb(2)Te(3)), a topological insulator and thermoelectric material, at room temperature. In this disordered substitution alloy, Sb(2)Te(3) crystallizes into a monoclinic structure with the space group C2/m, which is different from the corresponding high-pressure phase of the similar isostructural compound Bi(2)Te(3). Above 19.8 GPa, Sb(2)Te(3) adopts a body-centered-cubic structure with the disordered atomic array in the crystal lattice. The in situ high-pressure experiments down to about 13 K show that Sb(2)Te(3) undergoes the same phase-transition sequence with increasing pressure at low temperature, with almost the same phase-transition pressures.
authors: Natural Science Research Center, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China.
authors: Jinggeng
authors: J
authors: Zhao
authors: Haozhe
authors: H
authors: Liu
authors: Lars
authors: L
authors: Ehm
authors: Zhiqiang
authors: Z
authors: Chen
authors: Stanislav
authors: S
authors: Sinogeikin
authors: Yusheng
authors: Y
authors: Zhao
authors: Genda
authors: G
authors: Gu