Anharmonic vibrations and grüneisen parameter of the quasi-lattice of glassy arsenic chalcogenides in the free-volume approach

Anharmonic vibrations and grüneisen parameter of the quasi-lattice of glassy arsenic chalcogenides in the free-volume approach

It is shown that the free-volume approach offers the possibility of taking into account the anharmonicity of vibrations and nonlinearity of interatomic interactions in glassy arsenic chalcogenides. The Grüneisen parameters calculated by different formulas are compared, and the bond-breaking strain i...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic materials Vol. 36; no. 5; pp. 496 - 501
Main Author: Mel’nichenko, T. N.
Format: Journal Article
Language:English
Published: New York Springer Nature B.V 01-05-2000
Subjects:
Anharmonicity
Arsenic
Chalcogenides
Chemical bonds
Elongated structure
Gruneisen parameter
Mathematical models
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is shown that the free-volume approach offers the possibility of taking into account the anharmonicity of vibrations and nonlinearity of interatomic interactions in glassy arsenic chalcogenides. The Grüneisen parameters calculated by different formulas are compared, and the bond-breaking strain is correlated with the maximum possible bond elongation. The elementary atomic displacement in the structure of the glasses is evaluated. The ratio of the fraction of fluctuation-induced free volume to the lattice Grüneisen parameter in glassy arsenic chalcogenides is shown to differ from that in silicate glasses. The parameters of the free-volume model are correlated with those of the models relying on the present-day views of the structure of chalcogenide glasses.
ISSN:0020-1685
1608-3172
DOI:10.1007/BF02758056