Contribution to the thermal conductivity due to the correction term in the frame of the generalized callaway integral : application to Ge

Abstract The contribution to the lattice thermal conductivity due to the correction term (due to the three phonon normal processes) has been studied at very low temperatures in the frame of the generalized Callaway integral by deriving analytical expressions for it. The contribution of the correction term towards total phonon conductivity of Ge has been calculated in the temperature range 1–5 K and negligible contribution is found due to it.