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oai:uvadoc.uva.es:10324/653112025-02-13T09:51:44Zcom_10324_1158com_10324_931com_10324_894col_10324_1242

00925njm 22002777a 4500 dc Raymond, S. author Piekarz, P. author Sanchez, J.P. author Krisch, M. author Detlefs, B. author Rebizant, J. author Metoki, N. author Kaneko, K. author Jochym, P.T. author Oleś, A.M. author Parlinski, K. author Serrano Gutiérrez, Jorge author 2007 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 approx. 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. Journal of Alloys and Compounds 444–445 (2007) 104–108 0925-8388 https://uvadoc.uva.es/handle/10324/65311 10.1016/j.jallcom.2006.09.053 104 108 Journal of Alloys and Compounds 444-445 Probing the Coulomb interaction of PuCoGa5 by phonon spectroscopy