J. Phys. Soc. Jpn. 77 (2008) Supplement C pp. 69-71 |Previous Article| |Next Article| |Table of Contents|
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Proc. Int. Symp. Fe-Pnictide Superconductors
Photoemission Study of the Electronic Structure of LaFeAsO1-xFx and LaFePO1-xFx
Walid Malaeb1,
Teppei Yoshida2,
Takashi Kataoka1,
Atsushi Fujimori1,
Masato Kubota3,
Kanta Ono3,
Hidetomo Usui4,
Kazuhiko Kuroki4,
Ryotaro Arita5,6,
Hideo Aoki2,
Yoichi Kamihara7,
Masahiro Hirano7,8, and
Hideo Hosono7,8
1Department of Complexity Science and Engineering and Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033
2Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033
3Institute for Material Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801
4Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585
5Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8561
6CREST, JST, Bunkyo, Tokyo 113-8656
7ERATO-SORST, JST, in Frontier Research Center, Tokyo Institute of Technology, Mail Box S2-13, 4259 Nagatsuta, Midori, Yokohama 226-8503
8Frontier Research Center, Tokyo Institute of Technology, Mail Box S2-13, 4259 Nagatsuta, Midori, Yokohama 226-8503
(Received August 15, 2008)
We have performed a photoemission spectroscopy study of the newly discovered iron-based superconductors LaFeAsO1-xFx and LaFePO1-xFx. The valence-band spectra show a narrow Fe 3d-derived band near EF indicating the itinerant character of the Fe 3d states. In going from the undoped to F-doped compounds, all the spectra are found to shift to higher binding energies, consistent with electron doping within the rigid-band model. Also, in going from LaFeAsO1-xFx to LaFePO1-xFx, the near-EF intensity increases reflecting the weakening of electron correlation.
KEYWORDS:
LaFeAsO, electronic structure, photoemission spectroscopy
URL:
http://jpsj.ipap.jp/link?JPSJS/77SC/69/
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