Registry Effect on the Thermal Conductivity of Few-Layer Graphene

TL;DR

This study uses molecular dynamics simulations to investigate whether the registry effect influences the thermal conductivity of few-layer graphene, finding it to be negligible due to the dominance of interlayer breathing modes.

Contribution

It demonstrates that the registry effect has little impact on thermal conductivity in few-layer graphene, contrasting with previous assumptions about interlayer interactions.

Findings

Thermal conductivities are similar regardless of the interlayer potential used.

The registry effect is not significant for thermal transport in few-layer graphene.

Interlayer breathing modes dominate thermal transport, unaffected by registry.

Abstract

We perform molecular dynamics simulations to study the registry effect on the thermal conductivity of few-layer graphene. The interlayer interaction is described by either the Lennard-Jones potential or the registry-dependent potential. Our calculations show that the thermal conductivity in few-layer graphene from both potentials are close to each other, i.e the registry effect is essentially not important. It is because the thermal transport in few-layer graphene is mainly limited by the interlayer breathing mode, which is insensitive to the registry.