Post annealing effect on Ca(Fe<sub>1-x</sub>Co<sub>x</sub>)<sub>2</sub>As<sub>2</sub> and AeFe<sub>2</sub>As<sub>2</sub> (Ae = Ca, Sr, Ba) single crystals

ORAL

Abstract

Through post annealing & quenching process, we could induce superconductivity in the non-superconducting single crystals of Ca(Fe1-xCox)2As2 and AeFe2As2 (Ae = Ca, Sr, Ba) grown by self-flux solution method, with onset-Tc below 15 K, 16 K, 22 K and 24 K, respectively. A series of experiments were designed in order to look for the differences between as-grown samples and post annealed samples. By systematical characterization, including resistivity, Hall coefficient, magnetization, X-ray diffraction and wavelength dispersive spectroscopy results, the possible cause for the superconductivity in these samples is discussed. These experimental results help to shed light on the underlying mechanism for the repotted superconductivity in Fe-based 122 system.

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Presenters

  • Shuyuan Huyan

    • Texas Center for Superconductivity, University of Houston
    • The Texas Center for Superconductivity, University of Houston

Authors

  • Shuyuan Huyan

    • Texas Center for Superconductivity, University of Houston
    • The Texas Center for Superconductivity, University of Houston

  • Liangzi Deng

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston TX 77204
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204
    • Texas Center for Superconductivity, University of Houston, Texas 77204, USA
    • Physics, Texas Center for Superconductivity at the University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston
    • The Texas Center for Superconductivity, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA

  • Yanfeng Lyu

    • Texas Center for Superconductivity, University of Houston
    • The Texas Center for Superconductivity, University of Houston

  • Zheng Wu

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston TX 77204
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204
    • Texas Center for Superconductivity and Department of Physics, University of Houston
    • The Texas Center for Superconductivity, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA

  • Hanming Yuan

    • Texas Center for Superconductivity, University of Houston
    • The Texas Center for Superconductivity, University of Houston

  • Fei Tian

    • The Texas Center for Superconductivity, University of Houston

  • Yuanyuan Zhao

    • School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology

  • Kui Zhao

    • Advanced Micro-Fabrication Equipment Inc.

  • Jingying Sun

    • The Texas Center for Superconductivity, University of Houston

  • Melissa Gooch

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston TX 77204
    • Physics, Texas Center for Superconductivity at the University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston
    • The Texas Center for Superconductivity, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA

  • James K Meen

    • The Texas Center for Superconductivity, University of Houston

  • Shuo Chen

    • The Texas Center for Superconductivity, University of Houston

  • Zhifeng Ren

    • University of Houston
    • Department of Physics and TcSUH University of Houston
    • The Texas Center for Superconductivity, University of Houston

  • Ching-Wu Chu

    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston TX 77204
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204
    • Texas Center for Superconductivity, University of Houston, Texas 77204, USA
    • The Texas Center for Superconductivity, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA