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

页码：13 / 16

页数：4

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