Contribution of optical vibrations to the low-temperature specific heat of layered crystals
Е. С. СыркинPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovС. Б. ФеодосьевPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
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The contribution of optical vibrations to the specific heat as the crystal anisotropy changes is analyzed by the method of Jacobi matrices. It is shown that low-frequency optical modes existing in strongly anisotropic crystals yield a substantial contribution to the low-temperature thermodynamic characteristics of these compounds.
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