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|Title:||Multiplet Structure in Pu based Compounds - A Photoemission Case Study of PuSix (0.5 <x <2) Films|
|Authors:||GOUDER THOMAS; ELOIRDI RACHEL; REBIZANT JEAN; BOULET Pascal; HUBER FRANK|
|Citation:||PHYSICAL REVIEW B-CONDENSED MATTER vol. 71 p. 165101|
|Publisher:||AMER INST PHYSICS|
|Type:||Articles in periodicals and books|
|Abstract:||Thin films of PuSix s0.5x2d were prepared by sputter deposition and studied by x-ray and ultraviolet photoelectron spectroscopy. Photoemission of the Pu 4f core levels and the Pu 5f valence band states showed first a breakdown of 5f band behavior at low Si content, but then an increasing tendency for 5f hybridization for more diluted PuSix systems. In valence band spectra, a broad peak at high binding energy is observed for concentrated systems sPuSid. It is replaced by a sharp three-peak structure close to the Fermi level for more diluted systems sPuSi2d. Both structures are discussed in terms of final-state multiplets of localized 5f states with different degrees of hybridization. It is concluded that multiplets and final-state effects occur quite generally in Pu systems and explain many of the spectral features, which often have been ascribed to the ground-state density of state.|
|JRC Directorate:||Nuclear Safety and Security|
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