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The Callaway model is used to analyze the thermal-conductivity data of several samples of mercury telluride (HgTe), annealed under different conditions, between 1.7 and 300 K. In addition to the scattering of phonons by the boundary, point defects, and umklapp and normal processes, the scattering of phonons by dislocations and extended defects in the lattice, instead of hole-phonon scattering, is also considered. An excellent fit to the experimental data is obtained over the whole temperature range. The change, with annealing, of the electrical and phonon-scattering parameters is explained in a consistent manner. The origin of the extended defects is attributed to large micro- scale fluctuations in the composition of HgTe.
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Noguera et al. (1985) studied this question.
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