Moving nonlinear localized modes for one-dimensional Klein-Gordon diatomiclattice

We study analytically the moving nonlinear localized vibrational modes (dis crete breathers) for a one-dimensional Klein-Gordon diatomic lattice in the whole omega (q) plane of the system by means of a semi-discrete approximat ion, in which the carrier wave of the modes is treated explicitly while the envelope is described in the continuum approximation. We find that both pu lse and kink envelope moving modes for this lattice system can occur with c ertain carrier wave vectors and vibrational frequencies in separate regions of the omega (q) plane. However, the kink envelope moving modes have not b een reported previously for this lattice system.