中文版 | English
Title

Pressure-induced structural transitions, alloying and superconductivity in topological insulators Bi2Te2Se and Bi2Se2Te

Author
Corresponding AuthorCheng, Hu; Li, Yanchun
Publication Years
2022-08-01
DOI
Source Title
ISSN
1477-9226
EISSN
1477-9234
Volume51Pages:14630-14638
Abstract
Over the past decade, external pressure has been found to play an important role in modulating the structures and properties of sesqui-chalcogenides, but several key puzzles still remain to be solved. In this work, pressure-induced structural phase transitions, alloying and topological superconductivity in the ternary tetradymites Bi2Te2Se and Bi2Se2Te were investigated via in situ high-pressure angle-dispersive X-ray diffraction and resistance measurements. Both of them transform from the layered rhombohedral R3m structure to a 7-fold monoclinic C2/m phase, then to an 8-fold monoclinic C2/c structure, and eventually to a bcc alloy, which are quite different from previous work, but similar to the transitions in Bi2Te3. The superconductivity was found in the rhombohedral structure of Bi2Se2Te with T-c approximate to 2.2 K at 4.3 GPa, which should be related to the topological quantum transition. Furthermore, the atomic size and element electronegativity were discovered to have a significant effect on the alloying and amorphization of these compounds.
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
Others
Funding Project
National Natural Science Foundation of China[12104457]
WOS Research Area
Chemistry
WOS Subject
Chemistry, Inorganic & Nuclear
WOS Accession No
WOS:000852668400001
Publisher
EI Accession Number
20224513067016
EI Keywords
Alloying ; Bismuth ; Bismuth alloys ; Chalcogenides ; Chemical bonds ; Crystal structure ; Electronegativity ; Topology
ESI Classification Code
Metallurgy:531.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Physical Chemistry:801.4 ; Electrochemistry:801.4.1 ; Inorganic Compounds:804.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Crystal Lattice:933.1.1
ESI Research Field
CHEMISTRY
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/401565
DepartmentDepartment of Physics
Affiliation
1.Chinese Acad Sci, Multidisciplinary Res Ctr, Inst High Energy Phys, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Hu,Xu, Yixuan,Zhou, Xuefeng,et al. Pressure-induced structural transitions, alloying and superconductivity in topological insulators Bi2Te2Se and Bi2Se2Te[J]. DALTON TRANSACTIONS,2022,51:14630-14638.
APA
Cheng, Hu.,Xu, Yixuan.,Zhou, Xuefeng.,Gong, Yu.,Yang, Dongliang.,...&Li, Yanchun.(2022).Pressure-induced structural transitions, alloying and superconductivity in topological insulators Bi2Te2Se and Bi2Se2Te.DALTON TRANSACTIONS,51,14630-14638.
MLA
Cheng, Hu,et al."Pressure-induced structural transitions, alloying and superconductivity in topological insulators Bi2Te2Se and Bi2Se2Te".DALTON TRANSACTIONS 51(2022):14630-14638.
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