Low-temperature lattice structure anomaly in the LaFeAsO 0.93F0.07 superconductor by x-ray absorption spectroscopy: Evidence for a strong electron-phonon interaction

C. J. Zhang, H. Oyanagi, Z. H. Sun, Y. Kamihara, H. Hosono

研究成果: Article査読

33 被引用数 (Scopus)

抄録

The local lattice structure in LaFeAsO1-x Fx superconductors is studied by extended x-ray absorption fine-structure measurements. An anomalous upturn of the mean-square relative displacement of the Fe-As bond is detected below ∼70 K as electron carriers are introduced, reflecting the occurrence of Fe-As bond local lattice fluctuation. Similar to that in cuprates, this lattice fluctuation exhibits an abrupt depression at the onset superconducting transition temperature. The results indicate that strong electron-lattice interaction is involved in the superconducting transition in oxypcnictide superconductors, putting a strict limitation on possible theoretical models.

本文言語English
論文番号214513
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
78
21
DOI
出版ステータスPublished - 2008 12 1
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

フィンガープリント 「Low-temperature lattice structure anomaly in the LaFeAsO <sub>0.93</sub>F<sub>0.07</sub> superconductor by x-ray absorption spectroscopy: Evidence for a strong electron-phonon interaction」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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