Screened topological plasmons in graphene plasmonic crystals
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911699184910336 |
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| author | Soares, André Octávio Tserkezis, Christos Peres, N. M. R. |
| author_facet | Soares, André Octávio Tserkezis, Christos Peres, N. M. R. |
| contents | We study topological effects in an one-dimensional plasmonic crystal formed by the screened plasmons emerging in a periodically modulated graphene sheet, placed on top of a metallic substrate. To this end, we develop the theory of quantization of screened plasmons, as appropriate for lossless graphene described by a Drude conductivity. By analyzing the resulting band structure, we show that the crystal sustains nontrivial topological bands, with quantized geometric phase. We further show that in a finite, open system, edge states appear within the band gap, which undergo a topological phase transition and merge with bulk states as the modulation increases. Our work provides a robust theoretical framework for the study of band structure and topology of layered media, and extends the possibilities for engineering two-dimensional materials with external modulation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_00845 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Screened topological plasmons in graphene plasmonic crystals Soares, André Octávio Tserkezis, Christos Peres, N. M. R. Mesoscale and Nanoscale Physics We study topological effects in an one-dimensional plasmonic crystal formed by the screened plasmons emerging in a periodically modulated graphene sheet, placed on top of a metallic substrate. To this end, we develop the theory of quantization of screened plasmons, as appropriate for lossless graphene described by a Drude conductivity. By analyzing the resulting band structure, we show that the crystal sustains nontrivial topological bands, with quantized geometric phase. We further show that in a finite, open system, edge states appear within the band gap, which undergo a topological phase transition and merge with bulk states as the modulation increases. Our work provides a robust theoretical framework for the study of band structure and topology of layered media, and extends the possibilities for engineering two-dimensional materials with external modulation. |
| title | Screened topological plasmons in graphene plasmonic crystals |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.00845 |