Adsorption of a random heteropolymer with random self-interactions onto an interface |
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Authors: | VA Brazhnyi S Stepanow |
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Institution: | Martin-Luther-Universit?t Halle-Wittenberg, Fachbereich Physik, 06099 Halle, Germany, DE
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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.
Received 9 October 2001 and Received in final form 27 February 2002 Published online 6 June 2002 |
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Keywords: | 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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