Structural stability and phase transition of Bi2Te3 under high pressure and low temperature

被引：6
|
作者：
Zhang, J. L. [1 ,2 ]
Zhang, S. J. [2 ]
Zhu, J. L. [2 ]
Liu, Q. Q. [2 ]
Wang, X. C. [2 ]
Jin, C. Q. [2 ]
Yu, J. C. [1 ]
机构：
[1] Ningbo Univ, Fac Elect Engn & Comp Sci, Ningbo 315211, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2017年 / 521卷
基金：
中国国家自然科学基金;
关键词：
High pressure; Low temperature; Phase transition; X-ray diffraction; Topological superconductivity; TOPOLOGICAL INSULATORS; SURFACE;
D O I：
10.1016/j.physb.2017.06.042
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Structural stability and phase transition of topological insulator Bi2Te3 were studied via angle-dispersive synchrotron radiation X-ray diffraction under high pressure and low temperature condition. The results manifest that the R-3m phase (phase I) is stable at 8 K over the pressure range up to 10 GPa and phase transition occurs between 8 K and 45 K at 8 GPa. According to the Birch-Murnaghan equation of state, the bulk modulus at ambient pressure B-0 was estimated to be 45 +/- 3 GPa with the assumption of B'(0) = 4. The structural robustness of phase I at 8 K suggests that the superconductivity below 10 GPa is related to phase I. Topological properties of superconducting Bi2Te3 phase under pressure were discussed.
引用
收藏
页码：13 / 16
页数：4
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