Упругость 3D- и 2D-соединений XC (X=Si, Ge, Sn): модели Китинга и Харрисона

Abstract

For the bulk and monolayer IV group carbides in the scope of Keating and/or Harrison models analytical expressions are obtained for second order elastic constants , sound velocities , third order elastic constants , pressure dependencies of and , Grüneisen constant, thermal expansion coefficient and temperature dependence of bulk moduli. It is shown that in the row of SiC – GeC – SnC values of all considered characteristics decrease while thermal expansion coefficient increases. All the model estimations are compared with experimental data and calculating results of other authors.