Quenching of superconductivity by Co doping in K0.8Fe2Se2

Tingting Zhou; Xiaolong Chen; Jiangang Guo; Gang Wang; Xiaofang Lai; Shunchong Wang; Shifeng Jin; Kaixing Zhu

Quenching of superconductivity by Co doping in K0.8Fe2Se2

Superconductivity 2011-02-18 v1 Strongly Correlated Electrons

Authors: Tingting Zhou , Xiaolong Chen , Jiangang Guo , Gang Wang , Xiaofang Lai , Shunchong Wang , Shifeng Jin , Kaixing Zhu

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Abstract

We synthesized a series of K0.8Fe2-xCoxSe2 samples with nominal compositions 0\leq x\leq 0.035 and investigated their physical properties. The results show that the superconductivity in K0.8Fe2-xCoxSe2 is quenched down to 5 K by 0.5 at. % Co doping, the fastest quenching rate ever-reported. The role played here by Co is in contrast with the one in FeAs based superconductors where Co usually induces superconductivity from parent compounds. Such a rapid quenching favors a localized 3d model against the itinerant one for iron pnictide superconductors.

Keywords

superconductivity quenching cobalt doping K0.8Fe2Se2 iron-based superconductors localized 3d model

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@article{arxiv.1102.3506,
  title  = {Quenching of superconductivity by Co doping in K0.8Fe2Se2},
  author = {Tingting Zhou and Xiaolong Chen and Jiangang Guo and Gang Wang and Xiaofang Lai and Shunchong Wang and Shifeng Jin and Kaixing Zhu},
  journal= {arXiv preprint arXiv:1102.3506},
  year   = {2011}
}

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17 pages, 4 figures

Quenching of superconductivity by Co doping in K0.8Fe2Se2

Abstract

Keywords

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