Title: Probing the Coulomb Interaction of PuCoGa5 by Phonon Spectroscopy
Authors: RAYMOND S.PIERKARZ P.SANCHEZ J.-P.SERRANO J.KRISCH M.DETLEFS B.REBIZANT JEANMETOKI N.KANEKO K.JOCHYM P.OLES A.PARLINSKI K.
Citation: JOURNAL OF ALLOYS AND COMPOUNDS vol. 444-445 p. 104-108
Publisher: ELSEVIER SCIENCE SA
Publication Year: 2007
JRC N°: JRC40070
ISSN: 0925-8388
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC40070
Type: Contributions to Conferences
Abstract: The phonon dispersion curves of the unconventional superconductor PuCoGa5 were studied by inelastic X-ray scattering at room temperature. The experimental data agree well with ab initio lattice dynamics calculations. An accurate theoretical description of the phonon spectrum is obtained only when a local Coulomb repulsion U ¿ 3 eV among 5f electrons is taken into account. This implies partial localization of the 5f electrons in this compound. A comparison made with the phonon spectrum of UCoGa5 suggests that the latter compound is better described with a fully itinerant f electrons model.
JRC Institute:Institute for Transuranium Elements

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