Lattice dynamics of LaFeAsO1-xFx and PrFeAsO 1-y via inelastic X-ray scattering and first-principles calculation

Tatsuo Fukuda, Alfred Q.R. Baron, Shin Ichi Shamoto, Motoyuki Ishikado, Hiroki Nakamura, Masahiko Machida, Hiroshi Uchiyama, Satoshi Tsutsui, Akira Iyo, Hijiri Kito, Jui'Ichiro Mizuki, Masatoshi Arai, Hiroshi Eisaki, Hideo Hosono

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Abstract

The lattice dynamics of LaFeAsO1-xFx (x = 0, 0.1) and PrFeAsO1-y (y ∼ 0:1) are investigated using inelastic x-ray scattering and ab-initio calculation. Measurements of powder samples provide an approximation to the phonon DOS, while dispersion is measured from a single crystal of PrFeAsO1-y. A model that agrees reasonably well with all of the data at room temperature is built from results of abinitio calculations by reducing the strength of the Fe-As bond by 30%.

Original languageEnglish
Article number103715
JournalJournal of the Physical Society of Japan
Volume77
Issue number10
DOIs
Publication statusPublished - 2008 Oct

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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