期刊
PHYSICAL REVIEW B
卷 87, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.020504
关键词
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资金
- National Basic Research Program of China [2011CBA00103, 2012CB821404]
- NSFC [11174247, 11104053, 11104051]
Through a combination of x-ray diffraction, electrical transport, magnetic susceptibility, and heat-capacity measurements, we report the effect of La doping on Sr in the newly discovered SrFBiS2 system. Superconducting transition with critical temperature T-c of 2.8 K, developed from a semiconducting-like normal state, was found in Sr0.5La0.5FBiS2. A strong diamagnetic signal and a clear specific-heat anomaly associated with this transition were observed, confirming bulk superconductivity. The upper critical field H-c2(0) was estimated to be 1 T by using the Ginzburg-Landau approach. Our experiments therefore demonstrate that bulk superconductivity can be achieved by electron doping in the SrFBiS2 system. DOI: 10.1103/PhysRevB.87.020504
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