Exploration of the topological quantum materials with electron correlation is at the frontier of physics, as the strong interaction may give rise to new topological phases and transitions. Here we report that a family of kagome magnets RMn6Sn6 manifest the quantum transport properties analogical to those in the quantum-limit Chern magnet TbMn6Sn6. The topological transport in the family, including quantum oscillations with nontrivial Berry phase and large anomalous Hall effect arising from Berry curvature field, points to the existence of massive Dirac fermions. Our observation demonstrates a close relationship between rare-earth magnetism and topological electron structure, indicating the rare-earth elements can effectively engineer the Chern quantum phase in kagome magnets.
@article{arxiv.2007.09913,
title = {Rare earth engineering in RMn$_6$Sn$_6$ topological kagome magnets},
author = {Wenlong Ma and Xitong Xu and Jia-Xin Yin and Hui Yang and Huibin Zhou and Zi-Jia Cheng and Yuqing Huang and Zhe Qu and Fa Wang and M. Zahid Hasan and Shuang Jia},
journal= {arXiv preprint arXiv:2007.09913},
year = {2021}
}