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• W2319729654 abstract "U${}_{x}$Au${}_{100ensuremath{-}x}$ thin films ($x=0$ to 100 at.%) have been prepared by sputter deposition and studied in situ by use of x-ray photoemission spectroscopy and ultraviolet spectroscopy. The valence band displays a two-peak structure near the Fermi level (${E}_{F}$), one (peak $ensuremath{alpha}$) pointing at ${E}_{F}$, characteristic of itinerant $5f$ states, and one (peak $ensuremath{beta}$) at $ensuremath{sim}$0.7 eV, which is representative of localized $5f$ states. The presence of the peak $ensuremath{alpha}$ at all the composition of the series ($x=0$ to 100 at.%) shows that $5f$ states are never purely localized. The evolution of the full width at half maximum of the $5f$ line displays three main domains of composition where the interaction evolves from a ($5f$, ligand states) ($x<25$ at.%) hybrid band to a pure $5f$ band ($x>50$ at.%). In an intermediate domain (30--50 at.%), the Au $5d6s$ conduction band narrows and shifts to higher binding energy at the extent of the interaction with U $5f$ states. A correlation of the valence band spectra is made with the U $4f$ core-level peak where the shape evolves from a three-peak structure ($x<10$ at.%), characteristic of a mixed valence state, to a single-peak structure ($xensuremath{geqslant}30$ at.%). Relativistic electronic structure theory based on the local density approximation plus exact diagonalization of a multiorbital Anderson impurity model explains well the valence photoemission features. The essential role of hybridization in the U-based systems is emphasized." @default.
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• W2319729654 date "2011-12-27" @default.
• W2319729654 modified "2023-09-23" @default.
• W2319729654 title "Dilution effect on the U<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mn>5</mml:mn><mml:mi>f</mml:mi></mml:mrow></mml:math>states in Au matrix: A photoemission spectroscopy study" @default.
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• W2319729654 doi "https://doi.org/10.1103/physrevb.84.235143" @default.
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