Soft and anisotropic local moments in 4$d$ and 5$d$ mixed-valence M${}_2$O${}_9$ dimers

Ying Li, Alexander A. Tsirlin, Tusharkanti Dey +3

We investigate via exact diagonalization of finite clusters the electronic structure and magnetism of M${}_2$O${}_9$ dimers in the mixed-valence hexagonal perovskites A${}_3$B'M${}_2$O${}_9$…