Role of the local structure in superconductivity of Lao0.5F0.5BiS2-xSex system

E. Paris, Y. Mizuguchi, M. Y. Hacisalihoglu, T. Hiroi, B. Joseph, G. Aquilanti, O. Miura, T. Mizokawa, N. L. Saini

研究成果: Article査読

20 被引用数 (Scopus)

抄録

We have studied the local structure of LaO0.5F0.5BiS2-xSex by Bi L1-edge extended x-ray absorption fine structure (EXAFS). We find a significant effect of Se substitution on the local atomic correlations with a gradual elongation of average in-plane Bi-S bondlength. The associated mean square relative displacement, measuring average local distortions in the BiS2 plane, hardly shows any change for small Se substitution, but decreases significantly for . The Se substitution appears to suppress the local distortions within the BiS2 plane that may optimize in-plane orbital hybridization and hence the superconductivity. The results suggest that the local structure of the BiS2-layer is one of the key ingredients to control the physical properties of the BiS2-based dichalcogenides.

本文言語English
論文番号145603
ジャーナルJournal of Physics Condensed Matter
29
14
DOI
出版ステータスPublished - 2017 3 6

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学

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「Role of the local structure in superconductivity of Lao<sub>0.5</sub>F<sub>0.5</sub>BiS<sub>2-x</sub>Se<sub>x</sub> system」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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