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Plutonium-based compounds establish an ideal platform for exploring theinterplay between long-standing itinerant-localized 5$f$ states and stronglycorrelated electronic states. In this paper, we exhaustively investigate thecorrelated 5$f$ electronic states of PuSn$_3$ dependence on temperature bymeans of a combination of the density functional theory and the embeddeddynamical mean-field theory. It is found that the spectral weight of narrow5$f$ band grows significantly and remarkable quasiparticle multiplets appeararound the Fermi level at low temperature. A striking $c-f$ hybridization andprominent valence state fluctuations indicate the advent of coherence anditinerancy of 5$f$ states. It is predicted that a 5$f$ localized to itinerantcrossover is induced by temperature accompanied by the change in Fermi surfacetopology. Therefore itinerant 5$f$ states are inclined to take in activechemical bonding, suppressing the formation of local magnetic moment of Puatoms, which partly elucidates the intrinsic feature of paramagnetic groundstate of PuSn$_3$. Furthermore, the 5$f$ electronic correlations are orbitalselective manifested themselves in differentiated band renormalizations andelectron effective masses. Consequently, the convincing results remain crucialto our understanding of plutonium-based compounds and promote ongoing research.

Unraveling exotic 5$f$ states and paramagnetic phase of PuSn$_3$