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The peculiarities of the phonon spectrum in semiconductors with superlattice are investigated. The dispersion equation is solved for the case of high temperatures: 2Δ ≪ kT (2Δ is the miniband width, T the absolute temperature). The influence of electron‐phonon interaction on the effects under consideration is taken into account.
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Shmelev et al. (1977) studied this question.
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