Article Electronic Poiseuille flow in hexagonal boron nitride encapsulated graphene field effect transistors

Wenhao Huang ; Tathagata Paul ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Mickael L. Perrin ; Michel Calame

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Wenhao Huang, Tathagata Paul, Kenji Watanabe, Takashi Taniguchi, Mickael L. Perrin, Michel Calame. Electronic Poiseuille flow in hexagonal boron nitride encapsulated graphene field effect transistors. Physical Review Research. 2023, 5 (2), 023075. https://doi.org/10.1103/physrevresearch.5.023075
SAMURAI

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(abstract)

Electron-electron interactions in graphene are sufficiently strong to induce a correlated and momentum-conserving flow such that charge carriers behave similarly to the Hagen-Poiseuille flow of a classical fluid. In the current work, we investigate the electronic signatures of such a viscous charge flow in high-mobility graphene FETs. In two complementary measurement schemes, we monitor differential resistance of graphene for different channel widths and for different effective electron temperatures. By combining both approaches, the presence of viscous effects is verified in a temperature range starting from 178 K and extending up to room temperature. Our experimental findings are supported by finite element calculations of the graphene channel, which also provide design guidelines for device geometries that exhibit increased viscous effects. The presence of vis- cous effects near room temperature opens up avenues for functional hydrodynamic devices such as geometric rectifiers like a Tesla valve and charge amplifiers based on electronic Venturi effect.

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Keyword: Electron-electron interactions, graphene, viscous charge flow

Date published: 2023-05-01

Publisher: American Physical Society (APS)

Journal:

  • Physical Review Research (ISSN: 26431564) vol. 5 issue. 2 023075

Funding:

  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung 189924
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung 196795
  • Japan Society for the Promotion of Science 19H05790
  • Japan Society for the Promotion of Science 20H00354
  • Scientific Education and Research Institute MB22.00076

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1103/physrevresearch.5.023075

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Updated at: 2025-02-23 22:47:11 +0900

Published on MDR: 2025-02-23 22:47:12 +0900

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