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Journal Article

Probing the Coulomb interaction of PuCoGa5 by phonon spectroscopy

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Serrano,  J.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Oleś,  A. M.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Raymond, S., Piekarz, P., Sanchez, J. P., Serrano, J., Krisch, M., Detlefs, B., et al. (2007). Probing the Coulomb interaction of PuCoGa5 by phonon spectroscopy. Journal of Alloys and Compounds, 444, 104-108.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B7D1-7
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 approximate to 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. (C) 2006 Elsevier B.V. All rights reserved.