Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866916317949329408 |
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| author | Xu, Suheng Li, Yutao Vitalone, Rocco A. Jing, Ran Sternbach, Aaron J. Zhang, Shuai Ingham, Julian Delor, Milan McIver, James. W. Yankowitz, Matthew Queiroz, Raquel Millis, Andrew J. Fogler, Michael M. Dean, Cory R. Pasupathy, Abhay N. Hone, James Liu, Mengkun Basov, D. N. |
| author_facet | Xu, Suheng Li, Yutao Vitalone, Rocco A. Jing, Ran Sternbach, Aaron J. Zhang, Shuai Ingham, Julian Delor, Milan McIver, James. W. Yankowitz, Matthew Queiroz, Raquel Millis, Andrew J. Fogler, Michael M. Dean, Cory R. Pasupathy, Abhay N. Hone, James Liu, Mengkun Basov, D. N. |
| contents | Ultraclean graphene at charge neutrality hosts a quantum critical Dirac fluid of interacting electrons and holes. Interactions profoundly affect the charge dynamics of graphene, which is encoded in the properties of its electron-photon collective modes: surface plasmon polaritons (SPPs). Here we show that polaritonic interference patterns are particularly well suited to unveil the interactions in Dirac fluids by tracking polaritonic interference in time at temporal scales commensurate with the electronic scattering. Spacetime SPP interference patterns recorded in tera-hertz (THz) frequency range provided unobstructed readouts of the group velocity and lifetime of polariton that can be directly mapped onto the electronic spectral weight and the relaxation rate. Our data uncovered prominent departures of the electron dynamics from the predictions of the conventional Fermi-liquid theory. The deviations are particularly strong when the densities of electrons and holes are approximately equal. The proposed spacetime imaging methodology can be broadly applied to probe the electrodynamics of quantum materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_11502 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles Xu, Suheng Li, Yutao Vitalone, Rocco A. Jing, Ran Sternbach, Aaron J. Zhang, Shuai Ingham, Julian Delor, Milan McIver, James. W. Yankowitz, Matthew Queiroz, Raquel Millis, Andrew J. Fogler, Michael M. Dean, Cory R. Pasupathy, Abhay N. Hone, James Liu, Mengkun Basov, D. N. Strongly Correlated Electrons Mesoscale and Nanoscale Physics Optics Ultraclean graphene at charge neutrality hosts a quantum critical Dirac fluid of interacting electrons and holes. Interactions profoundly affect the charge dynamics of graphene, which is encoded in the properties of its electron-photon collective modes: surface plasmon polaritons (SPPs). Here we show that polaritonic interference patterns are particularly well suited to unveil the interactions in Dirac fluids by tracking polaritonic interference in time at temporal scales commensurate with the electronic scattering. Spacetime SPP interference patterns recorded in tera-hertz (THz) frequency range provided unobstructed readouts of the group velocity and lifetime of polariton that can be directly mapped onto the electronic spectral weight and the relaxation rate. Our data uncovered prominent departures of the electron dynamics from the predictions of the conventional Fermi-liquid theory. The deviations are particularly strong when the densities of electrons and holes are approximately equal. The proposed spacetime imaging methodology can be broadly applied to probe the electrodynamics of quantum materials. |
| title | Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2311.11502 |