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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.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Phonon hydrodynamics, graphitic materials, Poiseuille flow

刊行年月日: 2023-04-19

出版者: Springer Science and Business Media LLC

掲載誌:

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

研究助成金:

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

原稿種別: 出版者版 (Version of record)

MDR DOI:

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

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更新時刻: 2025-02-15 12:31:30 +0900

MDRでの公開時刻: 2025-02-15 12:31:31 +0900