Abstract
In a hydrogen-bonded molecular chain with a symmetric double-well potential, using the variational approach, we study the kink pair with anharmonic interatomic interactions in the two sublattices, based on the two-component soliton model. We obtain the asymmetric solutions of a kink pair and calculate the energy, the effective mass and the charge density of a kink pair due to anharmonicity. The calculated results are in good agreement with the experimental data.
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