Hydrodynamic phonon transport in suspended graphene
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Chen_Hydrodynamic phonon.pdf
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Author(s)
Lee, Sangyeop
Broido, David
Esfarjani, Keivan
Chen, Gang
Date Issued
February 2015
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Lee, Sangyeop, David Broido, Keivan Esfarjani, and Gang Chen. “Hydrodynamic Phonon Transport in Suspended Graphene.” Nature Communications 6 (February 18, 2015): 6290.
Version
Author's final manuscript
Abstract
Recent studies of thermal transport in nanomaterials have demonstrated the breakdown of Fourier’s law through observations of ballistic transport. Despite its unique features, another instance of the breakdown of Fourier’s law, hydrodynamic phonon transport, has drawn less attention because it has been observed only at extremely low temperatures and narrow temperature ranges in bulk materials. Here, we predict on the basis of first-principles calculations that the hydrodynamic phonon transport can occur in suspended graphene at significantly higher temperatures and wider temperature ranges than in bulk materials. The hydrodynamic transport is demonstrated through drift motion of phonons, phonon Poiseuille flow and second sound. The significant hydrodynamic phonon transport in graphene is associated with graphene’s two-dimensional features. This work opens a new avenue for understanding and manipulating heat flow in two-dimensional materials.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/ncomms7290
