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|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 JEAN; METOKI 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|
|JRC Publication N°:||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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