A new approach to calculation of the Kapitza conductance between solids

In connection with the development of various nanosystems (computer electronic circuits, thermoelectric devices, quantum cascade lasers, etc.), the problem of calculating the Kapitza conductance between various materials is very acute. An improved acoustic mismatch model for calculating the Kapitza conductance is proposed. The disadvantage of the currently existing model is that it uses the Debye approximation. This limits the applicability of the model to the low temperature region. It is shown that taking into account the dispersion of the waves ensures good agreement between the theory and experiment in a much wider temperature range than with modern models.