"Unusual Electron Behavior in Metallic Kagome Ferromagnets"

Researchers have conducted a detailed experimental study of the distinct electron pockets in the metallic kagome ferromagnet Fe3Sn2 using state-of-the-art laser-based micro-focused ARPES, overcoming averaging over crystallographic twins and surface sensitivity. The study revealed two distinct yet equivalent areas rotated from each other by 180°, indicating twinned domains, and provided insights into the electronic band structure and quasiparticle behavior at low temperatures. The findings suggest a many-body origin for the observed electron pockets and highlight the potential for exploiting electron-correlation effects for both measurement of the effective Coulomb interaction and the discovery of new electronic phenomena in materials with strongly influenced band structures.