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Dynamics and Thermodynamics of Anharmonic Crystals near the Instability Point
Author(s) -
MalinowskaAdamska C.
Publication year - 1983
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221180209
Subject(s) - anharmonicity , instability , thermodynamics , gibbs free energy , rubidium , phonon , isothermal process , physics , condensed matter physics , internal energy , crystal (programming language) , lattice (music) , chemistry , quantum mechanics , potassium , organic chemistry , computer science , acoustics , programming language
Using the self‐consistent phonon theory based on the thermodynamic double‐time Green's function method the dynamics of crystal lattice and the thermodynamics of the anharmonic cubic crystals in the vicinity of the instability point are investigated. The results of calculations for the instability temperature T s , relative displacements of atoms, anharmonic contributions to the free energy, and free Gibbs energy as well as the isothermal elastic constants are given and compared with experimental and other theoretical data for potassium, sodium, and rubidium.