Ballistic and Diffusive Thermal Conductivity of Graphene
Name
PhysRevApplied.9.024017.pdf
Size
1.4 MB
Format
Adobe PDF
Checksum (MD5)
a9ff3a1cabd2a743695bdb8b779716fc
Author(s)
Saito, Riichiro
Masashi, Mizuno
Dresselhaus, Mildred
Date Issued
February 2018
Journal
Physical Review Applied
Publisher
American Physical Society
Citation
Saito, Riichiro et al. "Ballistic and Diffusive Thermal Conductivity of Graphene." Physical Review Applied 9, 2 (February 2018): 024017 © 2018 American Physical Society
Version
Final published version
Abstract
Phonon-related thermal conductivity of graphene is calculated as a function of the temperature and sample size of graphene in which the crossover of ballistic and diffusive thermal conductivity occurs at around 100 K. The diffusive thermal conductivity of graphene is evaluated by calculating the phonon mean free path for each phonon mode in which the anharmonicity of a phonon and the phonon scattering by a¹³C isotope are taken into account. We show that phonon-phonon scattering of out-of-plane acoustic phonon by the anharmonic potential is essential for the largest thermal conductivity. Using the calculated results, we can design the optimum sample size, which gives the largest thermal conductivity at a given temperature for applying thermal conducting devices. This paper is a contribution to the Physical Review Applied collection in memory of Mildred S. Dresselhaus.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevApplied.9.024017
