Large anomalous Hall effect in the kagome ferromagnet LiMn 6 Sn 6
Аннотация: 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 LiMn$_6$Sn$_6$, 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 $\rho_{xz}$ and $\rho_{yx}$ indicate the coexistence of electrons and holes in the system. A large intrinsic anomalous Hall conductivity of 380 $\Omega^{-1}$ cm$^{-1}$, or 0.44 $e^2/h$ per Mn layer, is observed in $\sigma_{xy}^A$. This value is significantly larger than those in other $R$Mn$_6$Sn$_6$ ($R$ = 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 LiMn$_6$Sn$_6$ to the band crossings closely located near the Fermi energy.
Год издания: 2021
Авторы: Dong Chen, Congcong Le, Chenguang Fu, Haicheng Lin, Walter Schnelle, Yan Sun, Claudia Felser
Издательство: American Physical Society
Источник: Physical review. B./Physical review. B
Ключевые слова: Topological Materials and Phenomena, Advanced Condensed Matter Physics, Rare-earth and actinide compounds
Другие ссылки: Physical review. B./Physical review. B (PDF)
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Zenodo (CERN European Organization for Nuclear Research) (PDF)
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arXiv (Cornell University) (PDF)
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Physical review. B./Physical review. B (HTML)
Zenodo (CERN European Organization for Nuclear Research) (PDF)
Zenodo (CERN European Organization for Nuclear Research) (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
DataCite API (HTML)
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Том: 103
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