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Abstract— <p>We report a combined theoretical and experimental investigation of high-quality monocrystalline samples of the stoichiometric NaSn<sub>2</sub>As<sub>2</sub> superconductor. Transport properties are measured over the temperature range from 300 to 0.01 K with applied magnetic fields up to 0.5 T. Analysis of the critical current density temperature dependences <i>J</i><sub><i>c</i></sub>(<i>T</i>) and the upper critical field <i>H</i><sub><i>c</i>2</sub>(<i>T</i>) yields an estimate of the Ginzburg‒Landau parameter κ ≈ 35, unambiguously classifying NaSn<sub>2</sub>As<sub>2</sub> as a type-II superconductor. Ab initio calculations of the superconducting properties of NaSn<sub>2</sub>As<sub>2</sub>, performed using density functional theory, confirm the electron‒phonon nature of superconductivity.</p>

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Synthesis and Superconducting Properties NaSn2As2

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • V. A. Vlasenko,
  • B. I. Massalimov,
  • K. S. Pervakov,
  • L. A. Morgun,
  • I. V. Zhuvagin

摘要

Abstract—

We report a combined theoretical and experimental investigation of high-quality monocrystalline samples of the stoichiometric NaSn2As2 superconductor. Transport properties are measured over the temperature range from 300 to 0.01 K with applied magnetic fields up to 0.5 T. Analysis of the critical current density temperature dependences Jc(T) and the upper critical field Hc2(T) yields an estimate of the Ginzburg‒Landau parameter κ ≈ 35, unambiguously classifying NaSn2As2 as a type-II superconductor. Ab initio calculations of the superconducting properties of NaSn2As2, performed using density functional theory, confirm the electron‒phonon nature of superconductivity.