Lattice dynamics of FCC-cryocrystals with many-parametric impurities

The vibrational characteristics of the FCC-cryocrystals with substitutional impurities have been analyzed. A 'non-central' impurity atom in environment of the 'central' host atoms is considered. The difference between equilibrium interatomic distances r sub(0) and r sub(0) of the...

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Bibliographic Details
Published in:Journal of low temperature physics 1998-05, Vol.111 (3-4), p.441-446
Main Authors: Feodosyev, Sergei B, Gospodarev, Igor A, Mamalui, Maria A, Syrkin, Eugenii S
Format: Article
Language:English
Subjects:
Atoms
Crystal defects
Crystal impurities
Crystal lattices
Lattice vibrations
Numerical analysis
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Summary:The vibrational characteristics of the FCC-cryocrystals with substitutional impurities have been analyzed. A 'non-central' impurity atom in environment of the 'central' host atoms is considered. The difference between equilibrium interatomic distances r sub(0) and r sub(0) of the impurity and host atoms, respectively, causes their non-central interaction. A very strong dependence of the impurity frequency spectra on the ratio r sub(0) /r sub(0) is shown. The range of the values of this ratio which corresponds to dynamical stability of the system under consideration is determined.
ISSN:0022-2291
DOI:10.1023/a:1022260408796