Electrical control of intrinsic nonlinear Hall effect in antiferromagnetic topological insulator sandwiches
Fuente:
arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866917815398694912 |
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| author | Mei, Ruobing Kaplan, Daniel Yan, Binghai Chang, Cui-Zu Liu, Chao-Xing |
| author_facet | Mei, Ruobing Kaplan, Daniel Yan, Binghai Chang, Cui-Zu Liu, Chao-Xing |
| contents | Nonlinear Hall effect (NHE) can originate from the quantum metric mechanism in antiferromagnetic topological materials with PT symmetry, which has been experimentally observed in MnBi2Te4. In this work, we propose that breaking PT symmetry via external electric fields can lead to a dramatic enhancement of NHE, thus allowing for an electric control of NHE. Microscopically, this is because breaking PT symmetry can lift spin degeneracy of a Kramers' pair, giving rise to additional contributions within one Kramers' pair of bands. We demonstrate this enhancement through a model Hamiltonian that describes an antiferromagnetic topological insulator sandwich structure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_02738 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electrical control of intrinsic nonlinear Hall effect in antiferromagnetic topological insulator sandwiches Mei, Ruobing Kaplan, Daniel Yan, Binghai Chang, Cui-Zu Liu, Chao-Xing Mesoscale and Nanoscale Physics Materials Science Nonlinear Hall effect (NHE) can originate from the quantum metric mechanism in antiferromagnetic topological materials with PT symmetry, which has been experimentally observed in MnBi2Te4. In this work, we propose that breaking PT symmetry via external electric fields can lead to a dramatic enhancement of NHE, thus allowing for an electric control of NHE. Microscopically, this is because breaking PT symmetry can lift spin degeneracy of a Kramers' pair, giving rise to additional contributions within one Kramers' pair of bands. We demonstrate this enhancement through a model Hamiltonian that describes an antiferromagnetic topological insulator sandwich structure. |
| title | Electrical control of intrinsic nonlinear Hall effect in antiferromagnetic topological insulator sandwiches |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2406.02738 |