Low-temperature lattice anomaly in LaFeAsO0.93F0.07 probed by X-ray absorption spectroscopy: Evidence for strong electron-lattice interaction

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

研究成果: Article査読

抄録

Carrier-induced lattice distortion (signature of strong electron-lattice interaction) in oxypnictide superconductors is found by a local structural study using extended X-ray absorption fine structure (EXAFS). Local lattice instability (polaron formation) is detected as an anomalous upturn of the mean-square relative displacement for the nearest neighbor distances (Fe-As) in LaFeAsO1-xFx (x = 0.07). Intimate correlation between local lattice mode and superconductivity is revealed. The results suggest that strong electron-lattice interaction is present as a common ingredient in the microscopic mechanism of superconducting transition.

本文言語English
ページ(範囲)S311-S312
ジャーナルPhysica C: Superconductivity and its applications
470
SUPPL.1
DOI
出版ステータスPublished - 2010 12
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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