Journal of Statistical Physics

, Volume 80, Issue 3–4, pp 781–791 | Cite as

Twist in an exactly solvable directed lattice ribbon

  • E. Orlandini
  • E. J. Janse van Rensburg


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.

Key Words

Ribbon lattice models twist in DNA 


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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • E. Orlandini
    • 1
  • E. J. Janse van Rensburg
    • 2
  1. 1.Department of Theoretical PhysicsOxford UniversityOxfordEngland
  2. 2.Department of Mathematics and StatisticsYork UniversityNorth YorkCanada

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