Double exchange interaction in Mn-based topological kagome ferrimagnet

Wang, Jiameng; Ernst, Arthur; Antonov, Victor N.; Jiang, Qi; Qian, Haoji; Wang, Deyang; Cao, Jiefeng; Zhu, Fangyuan; Qiao, Shan; Ye, Mao

doi:10.1038/s42005-024-01838-9

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Double exchange interaction in Mn-based topological kagome ferrimagnet

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Ernst, Arthur
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Citation

Wang, J., Ernst, A., Antonov, V. N., Jiang, Q., Qian, H., Wang, D., et al. (2024). Double exchange interaction in Mn-based topological kagome ferrimagnet. Communications Physics, 7: 350. doi:10.1038/s42005-024-01838-9.

Cite as: https://hdl.handle.net/21.11116/0000-0010-2E65-A

Abstract

Recently discovered Mn-based kagome materials, such as RMn₆Sn₆ (R = rare-earth element), exhibit the coexistence of topological electronic states and long-range magnetic order, offering a platform for studying quantum phenomena. However, understanding the electronic and magnetic properties of these materials remains incomplete. Here, we investigate the electronic structure and magnetic properties of GdMn₆Sn₆ using x-ray magnetic circular dichroism, photoemission spectroscopy, and theoretical calculations. We observe localized electronic states from spin frustration in the Mn-based kagome lattice and induced magnetic moments in the nonmagnetic element Sn experimentally, which originate from the Sn- and Mn- orbital hybridization. Our calculations also reveal ferromagnetic coupling within the kagome Mn-Mn layer, driven by double exchange interaction. This work provides insights into the mechanisms of magnetic interaction and magnetic tuning in the exploration of topological quantum materials.