中国物理B ›› 2001, Vol. 10 ›› Issue (8): 689-693.doi: 10.1088/1009-1963/10/8/303
颜家壬1, 潘留仙2, 周光辉3
Zhou Guang-hui (周光辉)ab, Pan Liu-xian (潘留仙)ac, Yan Jia-ren (颜家壬)a
摘要: We study analytically the moving nonlinear localized vibrational modes (discrete breathers) for a one-dimensional Klein-Gordon diatomic lattice in the whole ω(q) plane of the system by means of a semi- discrete approximation, in which the carrier wave of the modes is treated explicitly while the envelope is described in the continuum approximation. We find that both pulse and kink envelope moving modes for this lattice system can occur with certain carrier wave vectors and vibrational frequencies in separate regions of the ω(q) plane. However, the kink envelope moving modes have not been reported previously for this lattice system.
中图分类号: (Localized modes)