The comprehensive phase evolution for Bi[subscript 2]Te[subscript 3] topological compound as function of pressure

Journal Article · Tue Jun 26 00:00:00 EDT 2012 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4726258· OSTI ID:1044420

Zhang, S J; Zhang, J L; Yu, X H; Zhu, J; Kong, P P; Feng, S M; Liu, Q Q; Yang, L X; Wang, X C; Cao, L Z; Yang, W G; Wang, L; Mao, H K; Zhao, Y S; Liu, H Z; Dai, X; Fang, Z; Zhang, S C; Jin, C Q ^[1]

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1. Stanford

The recently discovered three-dimensional topological insulator Bi{sub 2}Te{sub 3} is studied as function of pressure in terms of crystal structures, resistance, and Hall coefficient. The superconductivity is found in phase I (ambient phase) Bi{sub 2}Te{sub 3} with T{sub c}-3 K, which is related to the topological features. The evolution of crystal structure with pressure is investigated by high pressure synchrotron radiation experiments that reveal structural transitions occurring at about 8 GPa, 13 GPa, and 16 GPa, respectively. Furthermore, the high pressure phases of Bi{sub 2}Te{sub 3} are also superconducting but with much higher T{sub c}-8 K. The superconducting transitions are compared with those for Bi, Te elements. A global phase diagram of Bi{sub 2}Te{sub 3} as function of pressure up to 30 GPa is obtained.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: FOREIGNNSF
• OSTI ID: 1044420
• Journal Information: Journal of Applied Physics, Vol. 111, Issue 11; Conference: Miami FL; ISSN 0021-8979
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BISMUTH COMPOUNDS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
HALL EFFECT
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
SUPERCONDUCTIVITY
SYNCHROTRON RADIATION
TRANSITION TEMPERATURE