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 (nf=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 f6 states relative to f5 suppresses valence fluctuations, resulting in integral-valent (nf=5.0) local moment metals.
@article{arxiv.0909.4586,
title = {Valence Fluctuations and Quasiparticle Multiplets in Pu Chalcogenides and Pnictides},
author = {Chuck-Hou Yee and Gabriel Kotliar and Kristjan Haule},
journal= {arXiv preprint arXiv:0909.4586},
year = {2010}
}