Electronic Structure and Electron Correlation in LaFeAsO1-xFx and LaFePO1-xFx
Photoemission spectroscopy is used to investigate the electronic structure of the newly discovered iron-based superconductors LaFeAsO 1- x F x and LaFePO 1- x F x . Line shapes of the Fe 2 p core-level spectra suggest an itinerant character of Fe 3 d electrons. The valence-band spectra are generally...
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| Other Authors: | , , , , , |
| Format: | article |
| Published: |
2008
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| Online Access: | http://hdl.handle.net/10725/16623 https://doi.org/10.1143/JPSJ.77.093714 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://journals.jps.jp/doi/abs/10.1143/JPSJ.77.093714 |
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| Summary: | Photoemission spectroscopy is used to investigate the electronic structure of the newly discovered iron-based superconductors LaFeAsO 1- x F x and LaFePO 1- x F x . Line shapes of the Fe 2 p core-level spectra suggest an itinerant character of Fe 3 d electrons. The valence-band spectra are generally consistent with band-structure calculations except for the shifts of Fe 3 d -derived peaks toward the Fermi level. From the spectra taken in the Fe 3 p → 3 d core-absorption region, we have obtained the experimental Fe 3 d 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. |
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