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

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number193107
JournalApplied Physics Letters
Volume95
Issue number19
DOIs
Publication statusPublished - 2009
Externally publishedYes

Fingerprint

fluorine
spectroscopy
spatial distribution
ions
superconductivity
substitutes
microscopy
transmission electron microscopy
scanning electron microscopy
oxygen

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Direct imaging of doped fluorine in LaFeAsO1-xFx superconductor by atomic scale spectroscopy. / Tohei, Tetsuya; Mizoguchi, Teruyasu; Hiramatsu, Hidenori; Kamihara, Yoichi; Hosono, Hideo; Ikuhara, Yuichi.

In: Applied Physics Letters, Vol. 95, No. 19, 193107, 2009.

Research output: Contribution to journalArticle

Tohei, Tetsuya ; Mizoguchi, Teruyasu ; Hiramatsu, Hidenori ; Kamihara, Yoichi ; Hosono, Hideo ; Ikuhara, Yuichi. / Direct imaging of doped fluorine in LaFeAsO1-xFx superconductor by atomic scale spectroscopy. In: Applied Physics Letters. 2009 ; Vol. 95, No. 19.
@article{cc128d1d763d4e3697f9caae1d3e05e0,
title = "Direct imaging of doped fluorine in LaFeAsO1-xFx superconductor by atomic scale spectroscopy",
abstract = "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.",
author = "Tetsuya Tohei and Teruyasu Mizoguchi and Hidenori Hiramatsu and Yoichi Kamihara and Hideo Hosono and Yuichi Ikuhara",
year = "2009",
doi = "10.1063/1.3263148",
language = "English",
volume = "95",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "19",

}

TY - JOUR

T1 - Direct imaging of doped fluorine in LaFeAsO1-xFx superconductor by atomic scale spectroscopy

AU - Tohei, Tetsuya

AU - Mizoguchi, Teruyasu

AU - Hiramatsu, Hidenori

AU - Kamihara, Yoichi

AU - Hosono, Hideo

AU - Ikuhara, Yuichi

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=70449729768&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70449729768&partnerID=8YFLogxK

U2 - 10.1063/1.3263148

DO - 10.1063/1.3263148

M3 - Article

AN - SCOPUS:70449729768

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 19

M1 - 193107

ER -