Two-component soliton model for proton transport in hydrogen-bonded molecular chains

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Abstract
We propose a two-component soliton model for proton storage and transport in hydrogen-bonded quasi-one-dimensional chains. The model is investigated both analytically and by molecular-dynamics simulations. At 310 K we find that in certain regions of the parameter space it is possible, from realistic initial conditions, to excite a kink in the proton sublattice. For certain parameter values and initial conditions the kink is excited just to be annihilated shortly after. For other parameter values the kink continues to travel for much longer times. Therefore the presented model can explain the essential physics of proton storage as well as proton transport in hydrogen-bonded substances.

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