Adsorption of a random heteropolymer with self-interactions onto an interface

Details Adsorption of a random heteropolymer with self-interactions onto an interface Adsorption of a random heteropolymer with self-interactions onto an interface

2001-10-08

arxiv.org/abs/cond-mat/0110153v1

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 3 figures

Scientific paper

10.1140/epjb/e2002-00166-1

We consider the adsorption of a random heteropolymer onto an interface within the model by Garel et al. [1] by taking into account self-interactions between the monomers. Within the replica trick and by using a self-consistent preaveraging procedure we map the adsorption problem onto the problem of binding state of a quantum mechanical Hamiltonian. The analysis of the latter is treated within the variational method based on the 2-nd Legendre transform. We have found that self-interactions favor the localization. The effect is intensified with decrease of the temperature. Within a model without taking into account the repulsive ternary monomer-monomer interactions we predict a reentrant localization transition for large values of the asymmetry of the heteropolymer and at low enough temperatures.

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