Abstract
In this study, we perform a full-spectrum Monte Carlo simulation of phonon flow within single-interface systems. Detailed frequency-dependent (spectral) properties were collected and thoroughly explored. A linear elastic spectral model was also proposed to explain the simulation results. Owing to different mean free paths or Knudsen numbers, phonons of different frequencies possess different characteristic temperatures. In the absence of the inelastic scattering, the proposed model can predict well the spectral heat flux distribution and the spectral temperature. The differences between the model predictions and simulation results in the presence of the inelastic scattering highlight the importance of the coupling effect of the inelastic intrinsic scattering and frequency-dependent transmissivity.
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