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Abstract <p>Using tunneling spectroscopy of break-junctions, we have studied the temperature behavior of the critical current <i>I</i><sub>c</sub>(<i>T</i>) at zero magnetic field for alkali-metal based superconductors: composite K<sub>0.8</sub>Fe<sub>1.7</sub>(Se<sub>0.73</sub>S<sub>0.27</sub>)<sub>2</sub> selenides with natural phase separation and polycrystalline samples of CaKFe<sub>4</sub>As<sub>4</sub> pnictides. The measured bulk and intergrain <i>I</i><sub>c</sub>(<i>T</i>) dependences are analyzed and compared.</p>

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Temperature Dependence of Grain-Boundary Critical Current in K0.8Fe1.7(Se0.73S0.27)2 and CaKFe4As4

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • T. E. Kuzmicheva,
  • S. A. Kuzmichev,
  • A. D. Ilina,
  • I. A. Nikitchenkov,
  • Ye. O. Rakhmanov,
  • A. I. Shilov,
  • I. V. Morozov,
  • A. S. Medvedev,
  • V. A. Vlasenko,
  • K. S. Pervakov

摘要

Abstract

Using tunneling spectroscopy of break-junctions, we have studied the temperature behavior of the critical current Ic(T) at zero magnetic field for alkali-metal based superconductors: composite K0.8Fe1.7(Se0.73S0.27)2 selenides with natural phase separation and polycrystalline samples of CaKFe4As4 pnictides. The measured bulk and intergrain Ic(T) dependences are analyzed and compared.