Direct imaging of doped fluorine in LaFeAsO1-xFx superconductor by atomic scale spectroscopy

Tetsuya Tohei, Teruyasu Mizoguchi, Hidenori Hiramatsu, Yoichi Kamihara, Hideo Hosono, Yuichi Ikuhara

研究成果: Article査読

16 被引用数 (Scopus)

抄録

We report direct observation of fluorine ion dopants in the recently discovered LaFeAsO1-xFx superconductor, where the doping is critical for the superconductivity. Employing spectroscopic imaging based on scanning transmission electron microscopy, the spatial distribution of the doped fluorine ions, which are invisible in Z-contrast imaging, is clearly visualized with atomic-scale resolution. The observation directly proves that fluorine substitutes into the oxygen site in the superconducting LaFeAsO 1-xFx compound. Our results demonstrate the potential of the present method for revealing dopants undetectable by conventional microscopy imaging.

本文言語English
論文番号193107
ジャーナルApplied Physics Letters
95
19
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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