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As a long-standing topic, phonon hydrodynamics, owing to its unique collective transport physics, motivates theoreticians and experimentalists to explore it in micro-and nano-scale and at elevated temperatures nowadays. With its intrinsically strong normal scattering, graphitic materials have been predicted to facilitate hydrodynamic heat transport. However, the observation of phonon Poiseuille flow in graphitic samples remains a challenging task due to the experimental difficulties and missing theoretical understanding. Here, based on a micro-scale experimental platform and the pertinent occurrence criterion in anisotropic solids, we clearly demonstrate the phonon Poiseuille flow in a 5 μm-wide suspended graphite ribbon with purified 13C isotope concentration. Our observation is well supported by theoretical results based on kinetic theory with fully first-principles input. This work thus paves the way for deeper insight into phonon hydrodynamics and cutting-edge heat manipulating applications.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Phonon hydrodynamics, graphitic materials, Poiseuille flow

Date published: 2023-04-19

Publisher: Springer Science and Business Media LLC

Journal:

• Nature Communications (ISSN: 20411723) vol. 14 issue. 1 2044

Funding:

• MEXT | JST | Core Research for Evolutional Science and Technology JPMJCR19Q3
• MEXT | Japan Society for the Promotion of Science 21H04635

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

MDR DOI:

First published URL: https://doi.org/10.1038/s41467-023-37380-5

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Updated at: 2025-02-15 12:31:30 +0900

Published on MDR: 2025-02-15 12:31:31 +0900