Electronic structure and electron correlation in LaFeAsO 1-xFx and LaFePO1-xFx

Walid Malaeb, Teppei Yoshida, Takashi Kataoka, Atsushi Fujimori, Masato Kubota, Kanta Ono, Hidetomo Usui, Kazuhiko Kuroki, Ryotaro Arita, Hideo Aoki, Yoichi Kamihara, Masahiro Hirano, Hideo Hosono

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78 Citations (Scopus)

Abstract

Photoemission spectroscopy is used to investigate the electronic structure of the newly discovered iron-based superconductors LaFeAsO1-xF x and LaFePO1-xFx. Line shapes of the Fe 2p core-level spectra suggest an itinerant character of Fe 3d electrons. The valence-band spectra are generally consistent with band-structure calculations except for the shifts of Fe 3d-derived peaks toward the Fermi level. From the spectra taken in the Fe 3p → 3d core-absorption region, we have obtained the experimental Fe 3d partial density of states, and explained it in terms of a band-structure calculation with a phenomenological self-energy correction, yielding a mass renormalization factor of ≲2.

Original languageEnglish
Article number093714
JournalJournal of the Physical Society of Japan
Volume77
Issue number9
DOIs
Publication statusPublished - 2008 Sep

Keywords

  • Electronic structure
  • LaFeAsO
  • Photoemission spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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