A microscopic formulation of the phonon transmission at the nanoscale
Résumé
We present a microscopic approach for estimating the frequency vs. wave-vector dependent
phonon transmission across a solid-solid interface. We show that the spectral properties of the
heat flux can be generally deduced from the equilibrium displacements fluctuations of the
contact atoms. We have applied and demonstrated our formalism with molecular dynamics
simulations to predict the angular and mode dependent phonon transport in silicon and
germanium thin films. This notably unveils the existence of confined interface mode at the
thermal contacts. VC 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4816738]