Pressure-induced electron phase transitions of α-As2Te3

被引：11

作者：

Zhang, Yuhang ^{[1
]}

Ma, Yanmei ^{[1
]}

Geng, Aihui ^{[2
]}

Zhu, Chunye ^{[1
]}

Liu, Guangtao ^{[1
]}

Tao, Qiang ^{[1
]}

Li, Fangfei ^{[1
]}

Wang, Qinglin ^{[3
]}

Li, Yan ^{[1
]}

Wang, Xin ^{[1
]}

Zhu, Pinwen ^{[1
]}

机构：

[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130022, Peoples R China

[3] Ctr High Pressure Sci & Technol Adv Res, Changchun 130012, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 685卷

基金：

中国国家自然科学基金;

关键词：

As2Te3; High-pressure; Phase transition; Electronic band structure; Thermoelectric property; Bulk modulus; TOPOLOGICAL INSULATORS; THERMOELECTRIC-POWER; SUPERCONDUCTIVITY; SB2TE3; BI2SE3; BI2TE3; POLYMORPHISM; AS2TE3;

D O I：

10.1016/j.jallcom.2016.05.309

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using a diamond-anvil cell (DAC), we conducted in situ angle dispersive X-ray diffraction (ADXRD) up to 47.6 GPa at room temperature to evaluate the structural stability of alpha-As2Te3. A reversible structural transition was observed at between 17.4 and 36.3 GPa. The high-pressure structure is solved by a gamma-Bi2Te3-type monoclinic phase (C2/c, gamma-As2Te3). Reliable structural analyses, such as Rietveld refinement of the powder x-ray data, were provided, which show that the previously reported high-pressure beta-As2Te3 phase is not existed. It is worth mentioning that twice pressure-induced electron phase transitions were revealed in alpha-As2Te3 at about 3 and 6 GPa, which cause the striking fluctuation in thermoelectric property at that pressures. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：551 / 558

页数：8

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