Two Superconducting Phases and Their Characteristics in Layered BaTi2（Sb1-xBix）2O with x=0.16

Two correlated superconducting phases are identified in the layered superconductor BaTh （Sb1-xBix）2O （x = 0.16）, with the superconducting transition temperatures of Tc = 6K （the high Tc phase） and 3.4K （the low Tc Phase）, respectively. The 6K superconducting phase appears first in the as-prepared sa...

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Bibliographic Details
Published in:中国物理快报：英文版 2014 (7), p.168-171
Main Author: 伍岳 董晓莉 马明伟 杨槐馨 张超 周放 周兴江 赵忠贤
Format: Article
Language:English
Subjects:
低温度系数
外部压力
层状超导体
持续时间
真空退火
超导电性
超导相
超导转变温度
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Summary:Two correlated superconducting phases are identified in the layered superconductor BaTh （Sb1-xBix）2O （x = 0.16）, with the superconducting transition temperatures of Tc = 6K （the high Tc phase） and 3.4K （the low Tc Phase）, respectively. The 6K superconducting phase appears first in the as-prepared sample and can decay into the low TC phase by exposure to an ambient atmosphere for a certain duration. Specially, the high Tc phase can reappear from the decayed sample with the low Tc phase by vacuum annealing. It is also found that the CDW /SDW order occurs only with the 6 K superconducting phase. These notable features and alteration of the superconductivity due to the post-processing and external pressure can be explained by the scenario of electronic phase separation.
ISSN:0256-307X
1741-3540