Photoinduced dc Hall current in few-layer black phosphorus with a gate-tunable Floquet gap
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909754262028288 |
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| author | Kim, Taehun Kim, Hansol Kim, Dongeun Min, Hongki |
| author_facet | Kim, Taehun Kim, Hansol Kim, Dongeun Min, Hongki |
| contents | We theoretically explore Floquet engineering in few-layer black phosphorus (fBP) under time-periodic driving. Motivated by the ability of circularly polarized light to induce nontrivial topological states at Dirac nodes, we investigate the emergence of a photoinduced dc Hall effect in the Dirac semimetal phase of fBP. Starting from a low-energy continuum model, we derive the effective Floquet Hamiltonian and analytically calculate the Berry curvature, demonstrating the opening of a topological gap. We also perform lattice-model calculations incorporating a self-consistent Hartree method to compute Floquet band structures and dc Hall conductivity under a perpendicular electric field. Our results reveal that the dc Hall current in fBP can be effectively tuned via a periodic driving field and electrostatic gating. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_14949 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Photoinduced dc Hall current in few-layer black phosphorus with a gate-tunable Floquet gap Kim, Taehun Kim, Hansol Kim, Dongeun Min, Hongki Mesoscale and Nanoscale Physics We theoretically explore Floquet engineering in few-layer black phosphorus (fBP) under time-periodic driving. Motivated by the ability of circularly polarized light to induce nontrivial topological states at Dirac nodes, we investigate the emergence of a photoinduced dc Hall effect in the Dirac semimetal phase of fBP. Starting from a low-energy continuum model, we derive the effective Floquet Hamiltonian and analytically calculate the Berry curvature, demonstrating the opening of a topological gap. We also perform lattice-model calculations incorporating a self-consistent Hartree method to compute Floquet band structures and dc Hall conductivity under a perpendicular electric field. Our results reveal that the dc Hall current in fBP can be effectively tuned via a periodic driving field and electrostatic gating. |
| title | Photoinduced dc Hall current in few-layer black phosphorus with a gate-tunable Floquet gap |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2504.14949 |