Composition phase diagram of Eu1−xSrxMn1−zSb2 on the structural and magnetic transitions, Eu–Mn moment angle α, and nontrivial Berry phase is presented. A doping of nonmagnetic Sr on Eu site breaks lattice symmetry and induces various Eu spin reorientations that are coupled to quantum transport properties of the relativistic fermions generated the 2D Sb layers. Eu1−xSrxMn1−zSb2 is therefore a new unique material platform for exploring the Dirac band tuning by magnetism. Our study suggests nonmagnetic element doping to the rare-earth element site may be an effective strategy to generate topological electronic states and new magnetic states in layered compounds involving spatially separated rare-earth and transition metal layers.
- Qiang Zhang
- Jinyu Liu
- Zhiqiang Mao
