Plasmon dynamics in graphene
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866918367799017472 |
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| author | Xu, Suheng Yang, Birui Verma, Nishchhal Vitalone, Rocco A. Vermilyea, Brian Sánchez, Miguel Sánchez Ingham, Julian Jing, Ran Shao, Yinming Stauber, Tobias Rubio, Angel Delor, Milan Liu, Mengkun Fogler, Michael M. Dean, Cory R. Millis, Andrew Queiroz, Raquel Basov, D. N. |
| author_facet | Xu, Suheng Yang, Birui Verma, Nishchhal Vitalone, Rocco A. Vermilyea, Brian Sánchez, Miguel Sánchez Ingham, Julian Jing, Ran Shao, Yinming Stauber, Tobias Rubio, Angel Delor, Milan Liu, Mengkun Fogler, Michael M. Dean, Cory R. Millis, Andrew Queiroz, Raquel Basov, D. N. |
| contents | Plasmon are collective oscillations of mobile electrons with dynamics controlled by their charge stiffness("Drude weight"). Using terahertz spacetime metrology, we probe Plasmon dynamics of mono- and bi-layer graphene. In both systems, the experimentally measured Drude weight systematically exceeds the prediction based on non-interacting electronic system. The relative enhancement increases as the carrier density decreases. We attribute the observed deviation to the interplay of interactions and wave function structure of the Dirac fermions in multi-layer graphene. Our results establish that pseudospin structure of the single-particle electronic wave function can directly influence collective excitations, with implications that extend beyond graphene to a broad class of quantum materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_10493 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Plasmon dynamics in graphene Xu, Suheng Yang, Birui Verma, Nishchhal Vitalone, Rocco A. Vermilyea, Brian Sánchez, Miguel Sánchez Ingham, Julian Jing, Ran Shao, Yinming Stauber, Tobias Rubio, Angel Delor, Milan Liu, Mengkun Fogler, Michael M. Dean, Cory R. Millis, Andrew Queiroz, Raquel Basov, D. N. Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons Plasmon are collective oscillations of mobile electrons with dynamics controlled by their charge stiffness("Drude weight"). Using terahertz spacetime metrology, we probe Plasmon dynamics of mono- and bi-layer graphene. In both systems, the experimentally measured Drude weight systematically exceeds the prediction based on non-interacting electronic system. The relative enhancement increases as the carrier density decreases. We attribute the observed deviation to the interplay of interactions and wave function structure of the Dirac fermions in multi-layer graphene. Our results establish that pseudospin structure of the single-particle electronic wave function can directly influence collective excitations, with implications that extend beyond graphene to a broad class of quantum materials. |
| title | Plasmon dynamics in graphene |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.10493 |