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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.23791 |
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| _version_ | 1866912354123382784 |
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| author | Erhardt, Nina Girotto Castellano, Aloïs Batista, J. P. Alvarinhas Bianco, Raffaello Lončarić, Ivor Verstraete, Matthieu J. Novko, Dino |
| author_facet | Erhardt, Nina Girotto Castellano, Aloïs Batista, J. P. Alvarinhas Bianco, Raffaello Lončarić, Ivor Verstraete, Matthieu J. Novko, Dino |
| contents | The Raman active G mode in graphene exhibits strong coupling to electrons, yet the comprehensive treatment of this interaction in the calculation of its temperature-dependent Raman spectrum remains incomplete. In this study, we calculate the temperature dependence of the G mode frequency and linewidth, and successfully explain the experimental trend, by accounting for the contributions arising from the first-order electron-phonon coupling, electron-mediated phonon-phonon coupling, and standard lattice anharmonicity. The generality of our approach enables its broad applicability to study phonon dynamics in materials where both electron-phonon coupling and anharmonicity are important. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_23791 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electron-mediated anharmonicity and its role in the Raman spectrum of graphene Erhardt, Nina Girotto Castellano, Aloïs Batista, J. P. Alvarinhas Bianco, Raffaello Lončarić, Ivor Verstraete, Matthieu J. Novko, Dino Materials Science Mesoscale and Nanoscale Physics The Raman active G mode in graphene exhibits strong coupling to electrons, yet the comprehensive treatment of this interaction in the calculation of its temperature-dependent Raman spectrum remains incomplete. In this study, we calculate the temperature dependence of the G mode frequency and linewidth, and successfully explain the experimental trend, by accounting for the contributions arising from the first-order electron-phonon coupling, electron-mediated phonon-phonon coupling, and standard lattice anharmonicity. The generality of our approach enables its broad applicability to study phonon dynamics in materials where both electron-phonon coupling and anharmonicity are important. |
| title | Electron-mediated anharmonicity and its role in the Raman spectrum of graphene |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2410.23791 |