Two Superconducting Phases and Their Characteristics in Layered BaTi2 (Sb1?x Bix 2 O with x =0.16
WU Yue, DONG Xiao-Li** , MA Ming-Wei, YANG Huai-Xin, ZHANG Chao, ZHOU Fang, ZHOU Xing-Jiang, ZHAO Zhong-Xian**
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
Abstract ：Two correlated superconducting phases are identified in the layered superconductor BaTi2 (Sb1?x Bix 2 O (x =0.16), with the superconducting transition temperatures of TC =6 K (the high TC phase) and 3.4 K (the low TC Phase), respectively. The 6 K 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.
出版日期: 2014-06-30
:
74.81.-g
(Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities)
74.70.Xa
(Pnictides and chalcogenides)
74.25.-q
(Properties of superconductors)
71.45.Lr
(Charge-density-wave systems)
引用本文:
. [J]. 中国物理快报, 2014, 31(07): 77401-077401.
2 (Sb1?x Bix 2 O with x =0.16. Chin. Phys. Lett., 2014, 31(07): 77401-077401.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/31/7/077401
或
https://cpl.iphy.ac.cn/CN/Y2014/V31/I07/77401
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2014, Vol. 31 
