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Mechanical unfolding of directed polymers in a poor solvent: novel critical exponents | | A. Rosa
; D. Marenduzzo
; A. Maritan
; F. Seno
; | | Date: |
20 Dec 2002 | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | We study the thermodynamics of an exactly solvable model of a self-interacting partially directed self-avoiding walk (DSAW) 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 second order and characterized by new critical exponents which are determined by a careful numerical analysis. The usual polymer critical index $
u$ on the critical line, and another one, which we call $zeta$, take a non-trivial value which is numerically close to 2/3. | | Source: | arXiv, cond-mat/0301353 | | Services: | Forum | Review | PDF | Favorites | |
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