Soliton excitations in a diatomic lattice with nonlinear on-site potential

@article{Guoxiang1995SolitonEI,
  title={Soliton excitations in a diatomic lattice with nonlinear on-site potential},
  author={Huang Guo-xiang},
  journal={Acta Physica Sinica (overseas Edition)},
  year={1995},
  volume={4},
  pages={489-499}
}
  • Huang Guo-xiang
  • Published 1 July 1995
  • Physics
  • Acta Physica Sinica (overseas Edition)
We consider the soliton excitations in a diatomic chain with nonlinear on-site potential based on a quasi-discreteness approximation. Different from the theoretical approach developed before, our method is valid in the whole Brillouin zone of phonons. The gap solitons observed recently in a nonlinear diatomic pendulum lattice can be well explained qualitatively. It is also shown that if the wave number of the carrier wave is near the edge of the Brillouin zone, the results coinside with that of… 

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