Superconductivity in the nonsymmorphic line-nodal compound CaSb$_2$

Atsutoshi Ikeda; Mayo Kawaguchi; Shun Koibuchi; Tatsuki Hashimoto; Takuto Kawakami; Shingo Yonezawa; Masatoshi Sato; Yoshiteru Maeno

doi:10.1103/PhysRevMaterials.4.041801

Superconductivity in the nonsymmorphic line-nodal compound CaSb$_2$

Superconductivity 2020-04-15 v1

Authors: Atsutoshi Ikeda , Mayo Kawaguchi , Shun Koibuchi , Tatsuki Hashimoto , Takuto Kawakami , Shingo Yonezawa , Masatoshi Sato , Yoshiteru Maeno

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Abstract

We found superconductivity in CaSb $_2$ with the transition temperature of 1.7 K by means of electrical-resistivity, magnetic-susceptibility, and specific-heat measurements. This material crystallizes in a nonsymmorphic structure and is predicted to have multiple Dirac nodal lines in the bulk electronic band structure protected by symmetry even in the presence of spin-orbit coupling. We discuss a possible topological superconductivity for the quasi-2-dimensional band originating mainly from one of the antimony sites.

Keywords

superconductivity high-temperature superconductivity single crystal superconductivity

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@article{arxiv.2003.12800,
  title  = {Superconductivity in the nonsymmorphic line-nodal compound CaSb$_2$},
  author = {Atsutoshi Ikeda and Mayo Kawaguchi and Shun Koibuchi and Tatsuki Hashimoto and Takuto Kawakami and Shingo Yonezawa and Masatoshi Sato and Yoshiteru Maeno},
  journal= {arXiv preprint arXiv:2003.12800},
  year   = {2020}
}

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7 pages, 5 figures

Superconductivity in the nonsymmorphic line-nodal compound CaSb$_2$

Abstract

Keywords

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