Equations for small oscillations of a dislocation lattice are formulated in a simple one-component model. The lattice is formed by a periodic system of parallel rectilinear screw dislocations. Long-wavelength collective vibrations are described, among which are found vibrations similar to plasma oscillations in a system of electric charges. The possibility of a gap appearing in the frequency spectrum near the analog of the plasma frequency is pointed out.

Topics
Crystallographic defects, Superlattices, Acoustics, Frequency spectrum, Plasma waves
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