We report the temperature dependent cross-plane thermal conductivities of Ge quantum dot superlattices measured by the 3{ω} method. A large reduction in the thermal conductivity of the superlattices compared with that of bulk materials is observed. A simple model taking into account the relaxation time approximation, including phonon scattering on quantum dots, well explains the experimental data.
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Liu et al. (2003) studied this question.
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