We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Highly symmetric discrete breather in a two-dimensional Morse crystal.
- Authors
Korznikova, E.; Fomin, S.; Soboleva, E.; Dmitriev, S.
- Abstract
It has been shown recently that a moving discrete breathers localized in one close-packed atomic row can be excited in a two-dimensional monoatomic crystal with Morse interaction. In this work, a motionless discrete breathers having the threefold symmetry axis has been excited in the same crystal. The initial conditions for the excitation of such discrete breathers are set by the superposition of a bell-shaped function on a planar nonlinear phonon mode with the wave vector lying at the edge of the Brillouin zone. In addition, the displacement of the centers of atomic oscillations from the center of the discrete breathers owing to the asymmetry of the Morse potential is taken into account. The results obtained make it possible to approach the search for highly symmetric discrete breathers in three-dimensional crystals.
- Subjects
PHOTONIC crystals; NONLINEAR waves; SUPERPOSITION principle (Physics); BRILLOUIN zones; OSCILLATIONS
- Publication
JETP Letters, 2016, Vol 103, Issue 4, p277
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364016040081