Effect of Stone-Wales defects on the thermal conductivity of graphene

Abstract

The problem of phonon scattering by strain fields caused by Stone-Wales (SW) defects in graphene is studied in the framework of the deformation potential approach. An explicit form of the phonon mean free path due to phonon-SW scattering is obtained within the Born approximation. The mean free path demonstrates a specific $q$-dependence varying as $q^{-3}$ at low wavevectors and taking a constant value at large $q$. The thermal conductivity of graphene nanoribbons (GNRs) is calculated with the three-phonon umklapp, SW and rough edge scatterings taken into account. A pronounced decrease of the thermal conductivity due to SW defects is found at low temperatures whereas at room temperatures and above the phonon-phonon umklapp scattering becomes dominant. A comparison with the case of vacancy defects shows that they play more important role in the reduction of the thermal conductivity in GNRs over a wide temperature range.

9 pages, 5 figures

References in corpus (4)

• Thermal properties of graphene: Fundamentals and applications
• Thermal Conductivity and Thermal Rectification in Graphene Nanoribbons: a Molecular Dynamics Study
• From Point Defects in Graphene to Two-Dimensional Amorphous Carbon
• Self healing of vacancy defects in single layer graphene and silicene

Cited by in corpus (2)

• Growth, charge and thermal transport of flowered graphene
• Impact of grain boundary characteristics on thermal transport in polycrystalline graphene: Analytical results