Tunable high Chern-number quantum anomalous Hall effect through interlayer ferromagnetic coupling in two-dimensional ferromagnet NiSbO3
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913537421475840 |
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| author | Peng, Xuebing Si, Mingsu Gao, Daqiang |
| author_facet | Peng, Xuebing Si, Mingsu Gao, Daqiang |
| contents | The high Chern-number quantum anomalous Hall effect (QAHE) is significant and fascinating due to the presence of multiple dissipationless chiral edge states. Here, we predict that monolayer NiSbO3 possesses the Chern number C = 3, confirmed by the anomalous Hall conductance and the chiral edge states. The magnetic anisotropic energy (MAE) responsible for ferromagnetic order is 0.641 meV originating from Ni-d and Sb-p orbitals, where the contributed MAE from same spin-up channels predominates. In forward electric fields, the negative MAE makes the easy magnetization direction perpendicular to the surface, which is conducive to the realizing of high Chern-number QAHE. The simulated Curie temperature is 291 K. Intriguingly, in a bilayer, the obtained C = 6 is twice that of the monolayer, thanking to the interlayer ferromagnetic coupling. Our work offers a promising candidate for potential applications in topological quantum devices and spintronics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_05718 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Tunable high Chern-number quantum anomalous Hall effect through interlayer ferromagnetic coupling in two-dimensional ferromagnet NiSbO3 Peng, Xuebing Si, Mingsu Gao, Daqiang Mesoscale and Nanoscale Physics Materials Science The high Chern-number quantum anomalous Hall effect (QAHE) is significant and fascinating due to the presence of multiple dissipationless chiral edge states. Here, we predict that monolayer NiSbO3 possesses the Chern number C = 3, confirmed by the anomalous Hall conductance and the chiral edge states. The magnetic anisotropic energy (MAE) responsible for ferromagnetic order is 0.641 meV originating from Ni-d and Sb-p orbitals, where the contributed MAE from same spin-up channels predominates. In forward electric fields, the negative MAE makes the easy magnetization direction perpendicular to the surface, which is conducive to the realizing of high Chern-number QAHE. The simulated Curie temperature is 291 K. Intriguingly, in a bilayer, the obtained C = 6 is twice that of the monolayer, thanking to the interlayer ferromagnetic coupling. Our work offers a promising candidate for potential applications in topological quantum devices and spintronics. |
| title | Tunable high Chern-number quantum anomalous Hall effect through interlayer ferromagnetic coupling in two-dimensional ferromagnet NiSbO3 |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2410.05718 |