We study the thermodynamics of an exactly solvable model of a self-interacting, partially directed self-avoiding walk in two dimensions when a force is applied on one end of the chain. The critical force for the unfolding is determined exactly, as a function of the temperature, below the Theta transition. The transition is of second order and is characterized by new critical exponents that are determined by a careful numerical analysis. The usual polymer critical index nu on the critical line, and another one which we call zeta, takes a nontrivial value that is numerically close to 2/3.

Mechanical unfolding of directed polymers in a poor solvent: Critical exponents / Rosa, Angelo; Marenduzzo, D; Maritan, A; Seno, F.. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - 67:4(2003), pp. 1-7. [10.1103/PhysRevE.67.041802]

Mechanical unfolding of directed polymers in a poor solvent: Critical exponents

Rosa, Angelo;
2003-01-01

Abstract

We study the thermodynamics of an exactly solvable model of a self-interacting, partially directed self-avoiding walk in two dimensions when a force is applied on one end of the chain. The critical force for the unfolding is determined exactly, as a function of the temperature, below the Theta transition. The transition is of second order and is characterized by new critical exponents that are determined by a careful numerical analysis. The usual polymer critical index nu on the critical line, and another one which we call zeta, takes a nontrivial value that is numerically close to 2/3.
2003
67
4
1
7
041802
https://doi.org/10.1103/PhysRevE.67.041802
https://arxiv.org/abs/cond-mat/0301353v1
Rosa, Angelo; Marenduzzo, D; Maritan, A; Seno, F.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/16452
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