期刊
NEW JOURNAL OF PHYSICS
卷 11, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/11/2/025008
关键词
-
资金
- National Science Foundation of China
- National Basic Research Program of China [2006CB601003, 2007CB925001]
- Ministry of Education of China [IRT0754]
A series of 122 phase BaFe2-xNixAs2 (x = 0, 0.055, 0.096, 0.18 and 0.23) single crystals was grown by the self-flux method and a dome-like Ni doping dependence of the superconducting transition temperature was discovered. The transition temperature T-c(on) reaches a maximum of 20.5K at x = 0(096, and it drops to below 4K as x >= 0.23. The negative thermopower in the normal state indicates that the electron-like charge carrier indeed dominates in this system. This Ni-doped system provides another example of superconductivity induced by electron doping in the 122 phase.
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