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Exploration of the topological quantum materials with electron correlation isat the frontier of physics, as the strong interaction may give rise to newtopological phases and transitions. Here we report that a family of kagomemagnets RMn$_6$Sn$_6$ manifest the quantum transport properties analogical tothose in the quantum-limit Chern magnet TbMn$_6$Sn$_6$. The topologicaltransport in the family, including quantum oscillations with nontrivial Berryphase and large anomalous Hall effect arising from Berry curvature field,points to the existence of massive Dirac fermions. Our observation demonstratesa close relationship between rare-earth magnetism and topological electronstructure, indicating the rare-earth elements can effectively engineer theChern quantum phase in kagome magnets.

Rare earth engineering in RMn$_6$Sn$_6$ topological kagome magnets