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Orbital-Selective Electronic Reconstruction in PuFeO₃: Spin-Orbit-Driven Hybridization and Correlation Effects from

Ru-Song Li¹, Rong Guo², Xin Qu³

¹Shaanxi International Joint Research Center for Applied Technology of Controllable Neutron Source, Xijing University, Xi'an 710123, P. R. China.

Inorganic Chemistry

|January 12, 2026

Abstract:

Intermediate configurations in the plutonium and iron perovskite compound PuFeO₃ are investigated using a combined density functional theory plus dynamical mean-field theory (DFT + DMFT) approach. Our findings reveal orbital-selective metal-insulator transitions driven by spin-orbit split Pu-5f states. Itinerant 5f_5/2 electrons exhibit correlated metallic behavior, while localized 5f_7/2 states display Mott-insulating characteristics. We report an average 5f occupancy of 4.649, suggesting intermediate valence states. Quantum mechanical analysis highlights the Pu-5f/Fe-3d hybridization, confirmed by the orbital-resolved self-energy and spectral function calculations. This study provides new insights into the electronic structure and bonding mechanisms of Pu-based perovskites, advancing the understanding of strongly correlated actinide materials.

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