title: Extended temperature dependence of elastic constants in cubic crystals.
abstract: To extend the theory of the temperature dependence of the elastic constants in cubic crystals beyond the second- and third-order elastic constants, the fourth-order elastic constants, as well as the non-linearity in the thermal expansion temperature dependence, have been taken into account. Theoretical results were represented as temperature functions of the effective elastic constants and compared with experimental data for a number of cubic crystals, such as alkali metal halides, and elements gold and silver. The relations obtained give a more accurate description of the experimental temperature dependences of second-order elastic constants for a number of cubic crystals, including deviations from linear behavior. A good agreement between theoretical estimates and experimental data has been observed.
authors.affiliation: Moscow Institute of Physics and Technology, Russian Federation; Technological Institute for Superhard and Novel Carbon Materials, Russian Federation.
authors.forename: A V
authors.initials: AV
authors.lastname: Telichko
authors.affiliation: Moscow Institute of Physics and Technology, Russian Federation; Technological Institute for Superhard and Novel Carbon Materials, Russian Federation.
authors.forename: B P
authors.initials: BP
authors.lastname: Sorokin
keywords: Cubic crystals; Elastic constants; Nonlinearity; Temperature dependence; Thermal expansion