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

  • V.A. Brazhnyi
  • S. Stepanow

Abstract:

We consider the adsorption of a random heteropolymer onto an interface within the model of Garel et al. [#!gareletal89!#] by taking into account random self-interactions and ternary repulsive 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 2nd Legendre transform. Our study reveals a complex behaviour of the localization of the heteropolymer. In particular, we predict a reentrant localization transition for moderate values of the asymmetry of the distribution function of the monomer sequences along the heteropolymer.

PACS. 05.70.Np Interface and surface thermodynamics – 61.41.+e Polymers, elastomers, and plastics – 64.70.-p Specific phase transitions 

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Copyright information

© EDP Sciences, Springer-Verlag 2002

Authors and Affiliations

  • V.A. Brazhnyi
    • 1
  • S. Stepanow
    • 1
  1. 1.Martin-Luther-Universität Halle-Wittenberg, Fachbereich Physik, 06099 Halle, GermanyDE

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