Observation of phonon Poiseuille flow in isotopically purified graphite ribbons.

Nat Commun · 2023 · PMC10115893 · PMID 37076484

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a decreasing trendno p-value reported

4 d, κ / G ballistic of both samples show a decreasing trend as the temperature increases due to the predominant diffuse phonon-boundary scattering in relatively narrow ribbons.

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an increasing trendno p-value reported

With the decrease in temperature from 300 K, as the Umklapp phonon scattering becomes weaker, the thermal conductivities of both samples follow an increasing trend until they reach their peaks.

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