Breathers in one-dimensional nonlinear thermalized lattice with an energy gap

M. Eleftheriou, S. Flach, G. P. Tsironis

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


We study a model of a nonlinear lattice with an on-site potential that induces a breather gap, i.e. a frequency interval where breathers are unstable. The gap is determined numerically and after thermalization of the system we compute power spectra of local displacements. We find that the gap is clearly manifested at small couplings through a large spectral contribution in the linearized phonon region that is not shifted strongly with temperature.

Original languageEnglish
Pages (from-to)20-26
Number of pages7
JournalPhysica D: Nonlinear Phenomena
Issue number1-2
Publication statusPublished - Dec 1 2003


  • Breathers
  • Spectral gap

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Condensed Matter Physics
  • Applied Mathematics

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