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Temperature and mass dependence of anharmonic defect dynamics
Author(s) -
Salamatov E. I.
Publication year - 1996
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.2221970207
Subject(s) - anharmonicity , thermostat , allowance (engineering) , lattice (music) , condensed matter physics , langevin equation , materials science , physics , statistical physics , thermodynamics , mechanical engineering , acoustics , engineering
Within the framework of an approach with allowance for fluctuations of the mean energy of a particle interacting with a thermostat, the partial density of vibrational states (PDVS) of a crystal lattice defect located in a two‐well potential has been investigated. The results obtained are in good agreement with those of a numerical study of the corresponding Langevin equation. It has been shown that the mass dependence of the anharmonic defect PDVS is quite complicated and is determined by temperature.