Article

Short Communications
2017. V. 55. № 2. P. 312–314
Rekhviashvili S.Sh., Kunizhev Kh.L.
Investigation of the influence of lattice anharmonicity on the specific heats of diamond, silicon, and germanium
Annotation
The isochoric specific heats of diamond, silicon, and germanium have been calculated ab initio using the quantum-statistical method. The phonon energy has been calculated by the Morse potential. The anharmonicity of lattice atomic vibrations is shown to occur at temperatures below the Debye temperature. Experimental data on the temperature dependences of the specific heats of diamond, silicon, and germanium can be interpreted more correctly by taking into account the lattice anharmonicity.
Article reference:
Rekhviashvili S.Sh., Kunizhev Kh.L. Investigation of the influence of lattice anharmonicity on the specific heats of diamond, silicon, and germanium, High Temp., 2017. V. 55. № 2. P. 312