Valence Fluctuations and Quasiparticle Multiplets in Pu Chalcogenides and Pnictides

Abstract

The spectra of Pu chalcogenides and pnictides are computed with LDA+DMFT and interpreted with the aid of valence histograms and slave-boson calculations. We find the chalcogenides are mixed-valent ($n_f=5.2$) materials with a strongly $T$-dependent low-energy density of states and a triplet of quasiparticle peaks below the Fermi level. Furthermore, we predict a doublet of reflected peaks above the Fermi level. In the pnictides, the raising of $f^6$ states relative to $f^5$ suppresses valence fluctuations, resulting in integral-valent ($n_f=5.0$) local moment metals.

4 pages, 4 figures

References in corpus (5)

• What is the valence of a correlated solid? The double life of delta-plutonium
• Magnetic state of plutonium ion in metallic Pu and its compounds
• Spectral Properties of delta-Plutonium: Sensitivity to 5f Occupancy
• Dynamical mean field theory of correlated gap formation in Pu monochalcogenides
• One-Electron Physics of the Actinides

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