Abstract
We investigate the transition between a twisted regime and a disordered regime in a directed ribbon model on a cubic lattice. A fugacity corresponding to an interaction which models half-twists in the ribbon is introduced and the interacting model is solved exactly. Our results suggest that conformational entropy and a local interaction which induces twist are key ingredients to model qualitatively the crossover behavior between a twisted (helical) regime and a denatured regime in duplex biopolymers such as DNA.
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Orlandini, E., Janse van Rensburg, E.J. Twist in an exactly solvable directed lattice ribbon. J Stat Phys 80, 781–791 (1995). https://doi.org/10.1007/BF02178554
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DOI: https://doi.org/10.1007/BF02178554