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Enhanced Superconductivity in FeTe0.8S0.2 via Sn Doping

  • Cheng Cheng
  • Zhenjie FengEmail author
  • Tao Li
  • Qiang Hou
  • Difei Wang
  • Hongxia Wang
  • Yifan Zhang
  • Qing Li
  • Shixun Cao
  • Jincang Zhang
Characterization of Advanced Sintering Materials


Polycrystalline samples of Sn/FeTe0.8S0.2 with weight ratio x (Sn: FeTe0.8S0.2) = 0%, 3%, 5%, and 7% were successfully synthesized. Morphological characterizations of the samples indicate that introducing Sn is beneficial for grain growth, thus contributing to enhancement of superconductivity. In particular, the x = 3% sample exhibits a sharp superconducting transition and \( T_{\text{c}}^{\text{zero}} \) is increased by about 3 K based on RT curves. The low-melting-point material, Sn, is proposed to have two roles. One role is acting as the adhesive to combine the adjacent particles at the melting temperature of Sn, which is of benefit for improving the \( T_{\text{c}}^{\text{zero}} \) of the superconductivity. The other role is acting as the dopant in the tetragonal phase, which is of benefit for improving the \( T_{\text{c}}^{\text{onset}} \) of the superconductivity. This proposal may provide a new strategy for improving the superconductivity in other superconductors.



Financial support for this work from the Ministry of Science and Technology of the People’s Republic of China (2016YFB0700504) is gratefully acknowledged. We acknowledge the following funding: National Natural Science Foundation of China (11774217, 10904088), Shanghai Pujiang Program (13PJD015), Science and Technology Commission of Shanghai Municipality (13ZR1415200).


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Materials Genome Institute, Department of PhysicsShanghai UniversityShanghaiChina
  2. 2.Shanghai Key Laboratory of High Temperature SuperconductorsShanghai UniversityShanghaiChina
  3. 3.Bonn-Cologne Graduate School for Physics and AstronomyUniversity of BonnBonnGermany

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