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- Title
Electroacoustic waves of a moving domain wall superlattice in a ferroelectric crystal.
- Authors
Vilkov, E. A.; Maryshev, S. N.; Shevyakhov, N. S.
- Abstract
The dispersion properties of electroacoustic wave modes confined by a superlattice of 180° domain walls uniformly moving in a tetragonal ferroelectric crystal are considered. It is shown that the manifold of partial electroacoustic interfacial waves in the superlattice is restricted to the first allowed band, the configuration of which in the plane of spectral variables can significantly vary under the action of moving domain walls. For the partial electroacoustic interfacial waves with the Bloch wavenumbers χ π/ d (where d is the lattice half-period), the motion of domain walls is predicted to result in splitting of the modes of a static superlattice into pairs, which is invariant with respect to reversal of the direction of motion.
- Subjects
FERROELECTRIC crystals; SUPERLATTICES; ELECTROACOUSTICS; ACCELERATION waves; PROPERTIES of matter; PHYSICAL &; theoretical chemistry
- Publication
Technical Physics Letters, 2009, Vol 35, Issue 4, p326
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/S1063785009040117