Orbital-specific Itinerancy and Localization in a Kagome Magnet
By combining resonant inelastic X-ray scattering with advanced theoretical calculations, this study demonstrates that the kagome magnet YMnSn exhibits spontaneous orbital-selective itinerancy and localization driven by Hund's physics, establishing a new platform where geometric frustration and strong correlations cooperatively stabilize exotic quantum phases beyond traditional Mott or topological paradigms.