| MOVING NONLINEAR LOCALIZED MODES FOR ONE-DIMENSIONAL KLEIN－GORDON DIATOMIC LATTICE |
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| 作者姓名： | 周光辉 潘留仙 颜家壬 |
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| 作者单位： | (1)Department of Physics and Institute of Nonlinear Physics, Hunan Normal University, Changsha 410081, China; (2)Department of Physics and Institute of Nonlinear Physics, Hunan Normal University, Changsha 410081, China; Department of Physics, Yiyang Teacher's College, Yiyang 413049, China; (3)Department of Physics and Institute of Nonlinear Physics, Hunan Normal University, Changsha 410081, China; International Center for Materials Physics, Chinese Academy of Science, Shenyang 110015, China |
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| 基金项目： | Project supported by the Science Foundation of Hunan Education Commission (Grant No. 980506) and partly by the National Natural Science Foundation of China (Grant No. 19775013). |
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| 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.
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| 收稿时间： | 2000-07-17 |
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