Lattice Dynamics of LaFeAsO1-xFx and PrFeAsO1-y via Inelastic X-Ray Scattering and First-Principles Calculation

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...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2008-10, Vol.77 (10)
Main Authors: FUKUDA, Tatsuo, BARON, Alfred Q. R, MIZUKI, Junichiro, ARAI, Masatoshi, EISAKI, Hiroshi, HOSONO, Hideo, SHAMOTO, Shin-Ichi, ISHIKADO, Motoyuki, NAKAMURA, Hiroki, MACHIDA, Masahiko, UCHIYAMA, Hiroshi, TSUTSUI, Satoshi, IYO, Akira, KITO, Hijiri
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Phonons
Physics
Properties of type I and type II superconductors
Superconductivity
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Summary: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 ab-initio calculations by reducing the strength of the Fe-As bond by 30%.
ISSN:0031-9015
1347-4073
DOI:10.1143/jpsj.77.103715