Unusual Intralayer Ferromagnetism Between S = 5/2 ions in MnBi${}_2$Te${}_4$: Role of Empty Bi $p$ States

Jing Li, J. Y. Ni, X. Y. Li +4

The layered magnetic topological insulator MnBi${}_2$Te${}_4$ is a promising platform to realize the quantum anomalous Hall effect because its layers possess intrinsic ferromagnetism.…