Superconductivity induced by La doping in Sr1-xLaxFBiS2 system

Xi Lin; Xinxin Ni; Bin Chen; Xiaofeng Xu; Xuxin Yang; Jianhui Dai; Yuke Li; Xiaojun Yang; Yongkang Luo; Qian Tao; Guanghan Cao; Zhuan Xu

doi:10.1103/PhysRevB.87.020504

Superconductivity induced by La doping in Sr1-xLaxFBiS2 system

Superconductivity 2013-01-14 v1

Authors: Xi Lin , Xinxin Ni , Bin Chen , Xiaofeng Xu , Xuxin Yang , Jianhui Dai , Yuke Li , Xiaojun Yang , Yongkang Luo , Qian Tao , Guanghan Cao , Zhuan Xu

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Abstract

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 Tc 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 Hc2(0) was estimated to be 1 Tesla by using the Ginzburg-Landau approach. Our experiments therefore demonstrate that bulk superconductivity can be achieved by electron doping in the SrFBiS2 system.

Keywords

high-temperature superconductivity superconductivity mgb2 superconductivity

Cite

@article{arxiv.1301.2380,
  title  = {Superconductivity induced by La doping in Sr1-xLaxFBiS2 system},
  author = {Xi Lin and Xinxin Ni and Bin Chen and Xiaofeng Xu and Xuxin Yang and Jianhui Dai and Yuke Li and Xiaojun Yang and Yongkang Luo and Qian Tao and Guanghan Cao and Zhuan Xu},
  journal= {arXiv preprint arXiv:1301.2380},
  year   = {2013}
}

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4 pages,5 figures

Superconductivity induced by La doping in Sr1-xLaxFBiS2 system

Abstract

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