BSU bulletin. Chemistry. Physics
Bibliographic description:
, , NONLINEARITY OF THE INTER-ATOMIC INTERACTION FORCE AND ELASTIC PROPERTIES OF SOLIDS // BSU bulletin. Chemistry. Physics. - 2020. №2. . - С. 7-16.
Title:
NONLINEARITY OF THE INTER-ATOMIC INTERACTION FORCE AND ELASTIC PROPERTIES OF SOLIDS
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Annotation:
It was found that in the Leontiev and Belomestnykh-Tesleva formulas for the Grüneisen pa- rameter, the right-hand sides of the equalities depend on anharmonicity through the depend- ence of the ratio of the squared acoustic wave velocities (vL2/v 2) on the Grüneisen parameter γ. The theoretical dependence of (vL /vS ) on γ generally agrees with experimental data for both the crystals and glassy solids. The quantity (vL /vS ) turns out to be a single-valued function of the ratio of the tangential and normal stiffness of the interatomic bond.
Keywords:
Grüneisen parameter; longitudinal and transverse velocities of acoustic waves; anharmonicity; Poisson's ratio; solids; Leontiev and Belomestnykh-Tesleva formulas.
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