Orbital-dependent correlations in PuCoGa5

We investigate the normal state of the superconducting compound PuCoGa5 using the combination of density functional theory (DFT) and dynamical mean field theory, with continuous time quantum Monte Carlo as the impurity solver, and the DFT+Gutzwiller/rotationally invariant slave boson method. With both methods we find a strong tendency of the orbitals to differentiate. The more accurate DFT+DMFT method suggests the proximity to a Mott localization with one electron in the 5f7/2 band. In contrast, within the DFT+Gutzwiller method the 5f7/2 states are substantially upshifted due to electronic correlations. While the manifestation of the tendency towards orbital differentiation is different in the two methods, both remove the 5f7/2 spectral weight from the Fermi level relative to DFT.