First principles calculations of lattice thermal conductivity in mono- and bi-layer graphene

TL;DR

This study uses first principles calculations to determine the lattice thermal conductivity of mono- and bi-layer graphene, revealing high intrinsic thermal conductivity around 2200 W/mK at 300 K and minimal variation with layer number.

Contribution

First principles calculations of lattice thermal conductivity in mono- and bi-layer graphene, showing layer number has little effect on in-plane thermal properties.

Findings

Thermal conductivity is approximately 2200 W/mK at 300 K.

Thermal conductivity decreases with temperature following 1/T.

Layer number has minimal impact on in-plane thermal conductivity.

Abstract

Using calculations from first principles we have investigated the lattice thermal conductivity of ideal mono- and bi-layer graphene sheets. Our results demonstrate that the intrinsic thermal conductivity of both mono- and bi-layer graphene is around 2200 W/mK at 300 K, a value close to the one observed theoretically and experimentally in graphite basal plane, and at higher temperatures it decreases with the expected 1/T dependence. The little variation between mono- and bi-layer thermal conductivity suggests that increasing the number of layers does not affect significantly the in-plane thermal properties of these systems.