Sep 19, 2019
Pressure-induced superconductivity in B i2-x S bx T e3-y S ey
Physical Review B
- Volume
- 100
- Number
- 9
- First page
- 094525
- Last page
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevB.100.094525
© 2019 American Physical Society. We systematically investigated the pressure dependence of electrical transport and the crystal structure of topological insulator, Bi2-xSbxTe3-ySey, which showed no superconductivity down to 2.0 K at ambient pressure. The Bi2-xSbxTe3-ySey crystal showed two structural phase transitions under pressure, from rhombohedral structure (space group No. 166, R3m, termed phase I) to monoclinic structure (space group No. 12, C2/m, termed phase II), and from phase II to another monoclinic structure (space group No. 12, C2/m, termed phase III). Superconductivity appeared when applying pressure; actually the superconductivity of all Bi2-xSbxTe3-ySey samples emerged in phase I. The superconducting transition temperature, Tc, increased against pressure in a pressure range of 0-15 GPa for all Bi2-xSbxTe3-ySey samples, and the maximum Tc was 5.45 K, recorded at 13.5 GPa in Bi2-xSbxTe3-ySey at x=0 and y=1.0. The magnetic field (H) dependence of the R-T plot for Bi2-xSbxTe3-ySey was measured to characterize the superconducting pairing mechanism of pressure-induced superconducting phase.
- Link information
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- DOI
- https://doi.org/10.1103/PhysRevB.100.094525
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000486632400005&DestApp=WOS_CPL
- Research Projects
- キャリアドープされた2次元層状物質の圧力誘起超伝導
- Research Projects
- トポロジカル絶縁体を活性層とするトランジスタの超高圧特性の追求
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072763184&origin=inward
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85072763184&origin=inward
- ID information
-
- DOI : 10.1103/PhysRevB.100.094525
- ISSN : 2469-9950
- eISSN : 2469-9969
- SCOPUS ID : 85072763184
- Web of Science ID : WOS:000486632400005