An expression is given for the spectral energy density of acoustic phonons. The basic properties of anharmonic phonons are introduced, and an expression is written for their spectral energy density.
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L. Girifalko, Statistical Solid State Physics [Russian translation], Mir, Moscow (1975).
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3, pp. 102–106, March, 2020.
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Orlov, A.V., Gumirov, M.A., Orlov, V.L. et al. Spectral Energy Density of Phonons in Metals with Cubic Lattice. Russ Phys J 63, 462–466 (2020). https://doi.org/10.1007/s11182-020-02057-9
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DOI: https://doi.org/10.1007/s11182-020-02057-9