Intra-atomic magnetic octupoles and their coupling to cluster magnetic octupoles in Chiral antiferromagnets Mn${}_3$Sn

Dohoon Park, Seungyun Han, Hyun-Woo Lee

We demonstrate that Mn${}_3$Sn hosts finite intra-atomic magnetic octupoles (AMOs) $\mathbf{o}$ in addition to the well-established cluster magnetic octupole (CMO) $\mathbf{O}$. In c…