Heat vortex in hydrodynamic phonon transport of two-dimensional materials
We study hydrodynamic phonon heat transport in two-dimensional (2D) materials. Starting from the Peierls-Boltzmann equation with the Callaway model approximation, we derive a 2D Guyer-Krumhansl-like equation describing hydrodynamic phonon transport, taking into account the quadratic dispersion of flexural phonons. In addition to Poiseuille flow, second sound propagation, the equation predicts heat current vortices and negative non-local thermal conductance in 2D materials, which are common in classical fluids but have not yet been considered in phonon transport. Our results also illustrate the universal transport behaviors of hydrodynamics, independent of the type of quasi-particles and their microscopic interactions.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2020 |
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Erschienen: |
2020 |
Enthalten in: |
Zur Gesamtaufnahme - volume:10 |
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Enthalten in: |
Scientific reports - 10(2020), 1 vom: 19. Mai, Seite 8272 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Shang, Man-Yu [VerfasserIn] |
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Links: |
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Anmerkungen: |
Date Revised 19.05.2021 published: Electronic Citation Status PubMed-not-MEDLINE |
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doi: |
10.1038/s41598-020-65221-8 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM310104084 |
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