Correlation driven near-flat band Stoner excitations in a Kagome magnet.

ABSTRACT: Among condensed matter systems, Mott insulators exhibit diverse properties that emerge from electronic correlations. In itinerant metals, correlations are usually weak, but can also be enhanced via geometrical confinement of electrons, that manifest as 'flat' dispersionless electronic bands. In the fast developing field of topological materials, which includes Dirac and Weyl semimetals, flat bands are one of the important components that can result in unusual magnetic and transport behaviour. To date, characterisation of flat bands and their magnetism is scarce, hindering the design of novel materials. Here, we investigate the ferromagnetic Kagomé semimetal Co₃Sn₂S₂ using resonant inelastic X-ray scattering. Remarkably, nearly non-dispersive Stoner spin exc

SUBMITTER: Nag A 

PROVIDER: S-EPMC9705307 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature