Generation of Intrinsic Vibrational Gap Modes in Three-Dimensional Ionic Crystals
arXiv:cond-mat/9612170 · doi:10.1103/PhysRevB.55.5755
Abstract
The existence of anharmonic localization of lattice vibrations in a perfect 3-D diatomic ionic crystal is established for the rigid-ion model by molecular dynamics simulations. For a realistic set of NaI potential parameters, an intrinsic localized gap mode vibrating in the [111] direction is observed for fcc and zinc blende lattices. An axial elastic distortion is an integral feature of this mode which forms more readily for the zinc blende than for the fcc structure. Molecular dynamics simulations verify that in each structure this localized mode may be stable for at least 200 cycles.
5 pages, 4 figures, RevTeX, using epsf.sty. To be published in Phys. Rev. B. Also available at http://www.msc.cornell.edu/~kiselev/
Cited by in corpus (20)
- Discrete Breathers
- Intrinsic Localized Modes Observed in the High Temperature Vibrational Spectrum of NaI
- Solitons in Triangular and Honeycomb Dynamical Lattices with the Cubic Nonlinearity
- Prediction of high frequency intrinsic localized modes in Ni and Nb
- Properties of discrete breathers in graphane from ab initio simulations
- Impact of intrinsic localized modes of atomic motion on materials properties
- Energy transfer in strained graphene assisted by discrete breathers excited by external ac driving
- Asymmetric gap soliton modes in diatomic lattices with cubic and quartic nonlinearity
- Thermally populated intrinsic localized modes in pure alkali halide crystals
- Effect of discrete breathers on the specific heat of a nonlinear chain
- Effect of discrete breathers on macroscopic properties of the Fermi-Pasta-Ulam chain
- Optical creation of vibrational intrinsic localized modes in anharmonic lattices with realistic interatomic potentials
- Transverse intrinsic localized modes in monatomic chain and in graphene
- Wavelet imaging of transient energy localization in nonlinear systems at thermal equilibrium: the case study of NaI crystals at high temperature
- Nonlinear Modulation of Multi-Dimensional Lattice Waves
- Percolation in the classical blockmodel
- Linear local modes induced by intrinsic localized modes in a monatomic chain
- Self-consistent theory of intrinsic localized modes: application to monatomic chain
- Rate theory of acceleration of the defect annealing driven by discrete breathers
- Defect Formation in NaI Crystals: A Novel Pathway to Dark Matter Detection