Superconductivity in bulk polycrystalline metastable phases of Sb2Te3 and Bi2Te3 quenched after high-pressure-high-temperature treatmentстатья
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Дата последнего поиска статьи во внешних источниках: 11 августа 2015 г.
Аннотация:tWe synthesized bulk polycrystalline samples of metastable phases of Sb2Te3and Bi2Te3topological insu-lators 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 TC onset= 2 K and 6 K, respectively. A low critical current valueof 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.