Quasiparticle characteristics of the weakly ferromagnetic Hund metal MnSi

Hund's metals are multi-orbital systems with $3d$ or $4d$ electrons exhibiting both itinerant character and local moments, they feature Kondo-like screenings of orbital spin suppressed coherence temperature driven by coupling $J_H$. They often exhibit magnetic order at low temperature, but how the interaction between screening long-range is manifested in quasiparticle spectrum remains an open question. Here we present spectroscopic signature such a metal candidate MnSi weak ferromagnetism. Our photoemission measurements reveal renormalized bands near Fermi level strong momentum dependence: ferromagnetism manifests through possibly exchange-split (Q1) below $T_C$ , while spin/orbital lead to gradual development quasiparticles (Q2) upon cooling. results demonstrate characteristic could coexist compete form ferromagnet, via that well separated space distinct dependence. imply competition bears intriguing similarity Kondo lattice systems.