Superconductivity at 27 K in tetragonal FeSe under high pressure

Yoshikazu Mizuguchi; Fumiaki Tomioka; Shunsuke Tsuda; Takahide Yamaguchi; Yoshihiko Takano

doi:10.1063/1.3000616

Superconductivity at 27 K in tetragonal FeSe under high pressure

Superconductivity 2008-10-16 v2 Materials Science

Authors: Yoshikazu Mizuguchi , Fumiaki Tomioka , Shunsuke Tsuda , Takahide Yamaguchi , Yoshihiko Takano

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Abstract

A huge enhancement of the superconducting transition temperature Tc was observed in tetragonal FeSe superconductor under high pressure. The onset temperature became as high as 27 K at 1.48 GPa and the pressure coefficient showed a huge value of 9.1 K/GPa. The upper critical field Hc2 was estimated to be ~ 72 T at 1.48 GPa. Because of the high Hc2, FeSe system may be a candidate for application as superconducting wire rods. Moreover, the investigation of superconductivity on simple structured FeSe may provide important clues to the mechanism of superconductivity in iron-based superconductors.

Keywords

superconductivity single crystal superconductivity iron-based superconductor

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@article{arxiv.0807.4315,
  title  = {Superconductivity at 27 K in tetragonal FeSe under high pressure},
  author = {Yoshikazu Mizuguchi and Fumiaki Tomioka and Shunsuke Tsuda and Takahide Yamaguchi and Yoshihiko Takano},
  journal= {arXiv preprint arXiv:0807.4315},
  year   = {2008}
}

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8 pages, 6 figures

Superconductivity at 27 K in tetragonal FeSe under high pressure

Abstract

Keywords

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