Light-induced pseudo-magnetic fields in three-dimensional topological semimetals
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911577765052416 |
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| author | Raj, Arpit Chaudhary, Swati Rodriguez-Vega, Martin Vergniory, Maia G. Ilan, Roni Fiete, Gregory A. |
| author_facet | Raj, Arpit Chaudhary, Swati Rodriguez-Vega, Martin Vergniory, Maia G. Ilan, Roni Fiete, Gregory A. |
| contents | In this work, we show that suitably designed spatially varying linearly polarized light provides a versatile route to generate and control pseudo-magnetic fields in Weyl semimetals through Floquet engineering. Within a high-frequency expansion, we derive an effective axial gauge potential $\mathbf{A}_5(\mathbf{r})$ whose curl gives the pseudo-magnetic field $\mathbf{B}_5(\mathbf{r})$. By mapping the light profile to $\mathbf{A}_5(\mathbf{r})$, we establish design principles for pseudo-magnetic field textures that mimic strain-induced gauge fields while offering key advantages like dynamic control, full reversibility, spatial selectivity, and absence of material deformation. We compare the Landau-level spectra produced by uniform real and pseudo-magnetic fields and also analyze both their linear optical conductivity and the second-order dc responses. Our results enable real-time manipulation of pseudo-magnetic fields and predict clear experimental signatures for optically engineered gauge fields in topological semimetals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_08740 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Light-induced pseudo-magnetic fields in three-dimensional topological semimetals Raj, Arpit Chaudhary, Swati Rodriguez-Vega, Martin Vergniory, Maia G. Ilan, Roni Fiete, Gregory A. Mesoscale and Nanoscale Physics In this work, we show that suitably designed spatially varying linearly polarized light provides a versatile route to generate and control pseudo-magnetic fields in Weyl semimetals through Floquet engineering. Within a high-frequency expansion, we derive an effective axial gauge potential $\mathbf{A}_5(\mathbf{r})$ whose curl gives the pseudo-magnetic field $\mathbf{B}_5(\mathbf{r})$. By mapping the light profile to $\mathbf{A}_5(\mathbf{r})$, we establish design principles for pseudo-magnetic field textures that mimic strain-induced gauge fields while offering key advantages like dynamic control, full reversibility, spatial selectivity, and absence of material deformation. We compare the Landau-level spectra produced by uniform real and pseudo-magnetic fields and also analyze both their linear optical conductivity and the second-order dc responses. Our results enable real-time manipulation of pseudo-magnetic fields and predict clear experimental signatures for optically engineered gauge fields in topological semimetals. |
| title | Light-induced pseudo-magnetic fields in three-dimensional topological semimetals |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2510.08740 |