| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1485364 | Journal of Non-Crystalline Solids | 2007 | 4 Pages |
Abstract
A theoretical 'complete soft-mode-dynamics' model of the origin and properties of the boson peak accompanied by a high-frequency sound, observed in glasses of a certain type, is described. The origin is determined by interaction of non-acoustic vibrations with acoustic phonons and a Ioffe-Regel crossover for their inelastic scattering. The non-acoustic excitations are associated with vibrations of atomic soft-mode 'defects'. Two types of boson peak can be predicted in agreement with experiments.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Michael I. Klinger,