Nonlinear Excitations in Hydrogen-Bonded Chains with Anharmonic Interatomic Interactions |
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Authors: | Yuan-Fa Cheng |
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Institution: | (1) Department of Physics, Hubei University, Wuhan, 430062 Hubei, China |
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Abstract: | We discuss the nonlinear excitations and the motion of a kink soliton pair in hydrogen-bonded chains with anharmonic interatomic interactions, based on a two-component soliton model, using a direct perturbation method. The expression for the asymmetric solutions of the kink soliton pair is found because of anharmonicity, and the energy, the momentum and the effective mass of a kink pair for cubic and quartic anharmonicity are calculated, which are in good agreement with the experimental data. |
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Keywords: | nonlinear excitations hydrogen-bonded chains |
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