期刊
CHEMICAL PHYSICS LETTERS
卷 631, 期 -, 页码 97-102出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2015.04.056
关键词
-
资金
- Ministry of Education and Science of the Russian Federation [14.577.21.0090]
We synthesized bulk polycrystalline samples of metastable phases of Sb2Te3 and Bi2Te3 topological insulators by rapid quenching after a high-pressure-high-temperature treatment at P = 3.7-7.7 GPa; T = 873 K and found superconducting transitions with T-C(onset) = 2 K and 6 K, respectively. A low critical current value of about 2 mA in the metastable Sb2Te3 phase and an absence of the detectable heat capacity effect at the superconducting transition indicated a low-dimensional character of superconductivity. A zero-field magnetic susceptibility cusp and linear positive magnetoresistance indicate a topological insulator state. (C) 2015 Elsevier B.V. All rights reserved.
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