Probing the Coulomb interaction of PuCoGa by phonon spectroscopy

Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; Kirsch, M.*; Detlefs, B.*; Rebizant, J.*; Metoki, Naoto ; Kaneko, Koji ; Jochym, P. T.*; Ole, A. M.*; Parlinski, K.*

The phonon dispersion curves of the unconventional superconductor PuCoGa 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 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 UCoGa suggests that the latter compound is better described with a fully itinerant f electrons model.

Language	:	English
Journal	:	Journal of Alloys and Compounds
Volume	:	444-445
Number	:
Pages	:	p.104 - 108
Publication Year/Month	:	2007/10
Meeting title	:	Plutonium Futures, The Science 2006; A Topical Conference on Plutonium and Actinides
Held date	:	2006/07
Location (city)	:	Pacific Grove
Location (country)	:	U.S.A.
Patent information	:
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Paper URL	:	https://doi.org/10.1016/j.jallcom.2006.09.053
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Registration No. : BB20061709
JAEA Abstracts No. :
Paper Submission No. : 6775

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