Unraveling 5fcorrelated electronic states in paramagnetic PuSn₃

Plutonium-based compounds establish an ideal platform for exploring the interplay between long-standing itinerant-localized 5fstates and strongly correlated electronic states. In this paper, we exhaustively investigate the 5fcorrelated electronic states of PuSn₃dependence on temperature by means of a combination of the density functional theory and the embedded dynamical mean-field theory. It is found that the spectral weight of narrow 5fband grows significantly and remarkable quasiparticle multiplets appear around the Fermi level at low temperature. A strikingc-fhybridization and prominent valence state fluctuations indicate the advent of coherence and itinerancy of 5fstates. It is predicted that a 5flocalized to itinerant crossover is induced by temperature accompanied by the change in Fermi surface topology. Therefore itinerant 5fstates are inclined to take in active chemical bonding, suppressing the formation of local magnetic moment of Pu atoms, which partly elucidates the intrinsic feature of paramagnetic PuSn₃. Furthermore, the 5felectronic correlations are orbital selective, which manifested themselves in differentiated band renormalizations and electron effective masses. Consequently, the convincing results remain crucial to our understanding of plutonium-based compounds and promote ongoing research.