Sequence randomness and polymer collapse transitions

Details Sequence randomness and polymer collapse transitions Sequence randomness and polymer collapse transitions

1999-01-19

arxiv.org/abs/cond-mat/9901182v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 eps figures

Scientific paper

10.1103/PhysRevLett.83.112

Contrary to expectations based on Harris' criterion, chain disorder with frustration can modify the universality class of scaling at the theta transition of heteropolymers. This is shown for a model with random two-body potentials in 2D on the basis of exact enumeration and accurate Monte Carlo results. When frustration grows beyond a certain finite threshold, the temperature below which disorder becomes relevant coincides with the theta one and scaling exponents definitely start deviating from those valid for homopolymers.

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