The local structure of the Ca0.9Pr0.1Fe2As2 superconductor as a function of temperature

E. Paris, T. Wakita, L. Simonelli, C. Marini, W. Olszewski, K. Terashima, F. Stramaglia, G. M. Pugliese, T. Mizokawa, S. Ioka, K. Kudo, M. Nohara, T. Yokoya, N. L. Saini

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We have studied the local structure of Ca0.9Pr0.1Fe2As2, showing filamentary superconductivity above 40 K, by a combined analysis of Fe K-edge and As K-edge extended X-ray absorption fine structure measurements. The experiments are performed as a function of temperature exploiting a single crystal sample and in-plane polarization of the X-ray beam to extract information on the directional displacements. The local structure of the FeAs layer is found to be consistent with a regular FeAs4 tetrahedron containing negligible local disorder. Unlike other superconducting systems, we do not find any change in the atomic displacements across the superconducting transition temperature. The results are compatible with electron doping induced intrinsic superconductivity of optimized FeAs4 local structure containing negligible disorder.

本文言語English
論文番号095001
ジャーナルSuperconductor Science and Technology
32
9
DOI
出版ステータスPublished - 2019 7 19

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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