Nonlinearity of the inter-atomic interaction force and elastic properties of solids

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It was found that in the Leontiev and Belomestnykh-Tesleva formulas for the Grüneisen parameter, the right-hand sides of the equalities depend on anharmonicity through the dependence of the ratio of the squared acoustic wave velocities (vL2/vS2) on the Grüneisen parameter γ. The theoretical dependence of (vL2/vS2) on γ generally agrees with experimental data for both the crystals and glassy solids. The quantity (vL2/vS2) turns out to be a single-valued function of the ratio of the tangential and normal stiffness of the interatomic bond

Grüneisen parameter, longitudinal and transverse velocities of acoustic waves, anharmonicity, Poisson's ratio, solids, Leontiev and Belomestnykh-Tesleva formulas

Короткий адрес: https://sciup.org/148317074

IDR: 148317074   |   DOI: 10.18101/2306-2363-2020-2-7-16

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