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Large anomalous Hall effect in the kagome ferromagnet LiMn6Sn6

MPS-Authors
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Chen,  Dong
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Le,  Congcong
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Fu,  Chenguang
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Lin,  Haicheng
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  Walter
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Sun,  Yan
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Chen, D., Le, C., Fu, C., Lin, H., Schnelle, W., Sun, Y., et al. (2021). Large anomalous Hall effect in the kagome ferromagnet LiMn6Sn6. Physical Review B, 103(14): 144410, pp. 1-5. doi:10.1103/PhysRevB.103.144410.


Cite as: https://hdl.handle.net/21.11116/0000-0008-7C77-8
Abstract
Kagome magnets are believed to have numerous exotic physical properties due to the possible interplay between lattice geometry, electron correlation and band topology. Here, we report the large anomalous Hall effect in the kagome ferromagnet LiMn6Sn6, which has a Curie temperature of 382 K and easy plane along with the kagome lattice. At low temperatures, unsaturated positive magnetoresistance and opposite signs of ordinary Hall coefficient for ρxz and ρyx indicate the coexistence of electrons and holes in the system. A large intrinsic anomalous Hall conductivity of 380ω-1cm-1, or 0.44e2/h per Mn layer, is observed in σxyA. This value is significantly larger than those in other RMn6Sn6 (R = rare earth elements) kagome compounds. Band structure calculations show several band crossings, including a spin-polarized Dirac point at the K point, close to the Fermi energy. The calculated intrinsic Hall conductivity agrees well with the experimental value, and shows a maximum peak near the Fermi energy. We attribute the large anomalous Hall effect in LiMn6Sn6 to the band crossings closely located near the Fermi energy. © 2021 authors.