Influence of lattice disorder on the structure of persistent polymer chains

Abstract

We study the static properties of a semiflexible polymer exposed to a quenched random environment by means of computer simulations. The polymer is modeled as two-dimensional Heisenberg chain. For the random environment we consider hard disks arranged on a square lattice. We apply an off-lattice growth algorithm as well as the multicanonical Monte Carlo method to investigate the influence of both disorder occupation probability and polymer stiffness on the equilibrium properties of the polymer. We show that the additional length scale induced by the stiffness of the polymer extends the well-known phenomenology considerably. The polymer's response to the disorder is either contraction or extension depending on the ratio of polymer stiffness and void space extension. Additionally, the periodic structure of the lattice is reflected in the observables that characterize the polymer.

arXiv comment23 pages, 12 figures

References in corpus (8)

• Multicanonical Ensemble: A New Approach to Simulate First-order Phase Transitions
• Radial distribution function of semiflexible polymers
• The Glassy Wormlike Chain
• Replica field theory for a polymer in random media
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Cited by in corpus (1)

• Persistence-Length Renormalization of Polymers in a Crowded Environment of Hard Disks