title: High-pressure phase transitions, amorphization, and crystallization behaviors in Bi2Se3.
abstract: The phase transition, amorphization, and crystallization behaviors of the topological insulator bismuth selenide (Bi2Se3) were discovered by performing in situ high-pressure angle-dispersive x-ray diffraction experiments during an increasing, decreasing, and recycling pressure process. In the compression process, Bi2Se3 transforms from the original rhombohedral structure (phase I(A)) to a monoclinic structure (phase II) at about 10.4 GPa, and further to a body-centered tetragonal structure (phase III) at about 24.5 GPa. When releasing pressure to ambient conditions after the complete transformation from phase II to III, Bi2Se3 becomes an amorphous solid (AM). In the relaxation process from this amorphous state, Bi2Se3 starts crystallizing into an orthorhombic structure (phase I(B)) about five hours after releasing the pressure to ambient. A review of the pressure-induced phase transition behaviors of A2B3-type materials composed from the V and VI group elements is presented.
authors: Natural Science Research Center, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, People's Republic of China. zhaojinggeng@gmail.com
authors: Jinggeng
authors: J
authors: Zhao
authors: Haozhe
authors: H
authors: Liu
authors: Lars
authors: L
authors: Ehm
authors: Dawei
authors: D
authors: Dong
authors: Zhiqiang
authors: Z
authors: Chen
authors: Genda
authors: G
authors: Gu