Ballistic and Diffusive Thermal Conductivity of Graphene

Riichiro Saito, Masashi Mizuno, Mildred S. Dresselhaus

研究成果: Article査読

15 被引用数 (Scopus)

抄録

This paper is a contribution to the Physical Review Applied collection in memory of Mildred S. Dresselhaus.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 a C13 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.

本文言語English
論文番号024017
ジャーナルPhysical Review Applied
9
2
DOI
出版ステータスPublished - 2018 2月 20

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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