We report nonequilibrium molecular dynamics study of heat transfer in binary Lennard-Jones superlattices. The influence of the characteristic height of the interface roughness and the superlattice period on the in-plane thermal conductivity is reported. We observe that in-plane thermal conductivity first decreases with an increase in the characteristic height of the roughness. For perfectly periodic roughness, it seems that the thermal conductivity exhibit a minimum value when the characteristic height of the roughness becomes comparable with the superlattice period.

• Received 18 March 2009

DOI:https://doi.org/10.1103/PhysRevB.79.214307