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Self-generated disorder: from spin glasses to the glassy homopolymer globule

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons48668

Rostiashvili,  V. G.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48428

Migliorini,  G.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48919

Vilgis,  Thomas A.
MPI for Polymer Research, Max Planck Society;

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Citation

Rostiashvili, V. G., Migliorini, G., & Vilgis, T. A. (2002). Self-generated disorder: from spin glasses to the glassy homopolymer globule. Journal of Non-Crystalline Solids, 307, 199-207.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-6527-A
Abstract
We have investigated the interrelation between spin glasses and structural glasses. Spin glasses in this case are p-spin interaction spin glasses (at p > 2) or Potts glasses which contain quenched disorder, whereas the structural glasses are here exemplified by the homopolymeric globule, which can be viewed as a liquid of connected units on nanoscales. It is argued that the homopolymeric globule problem can be mapped onto a disorder field theoretical model whose effective Hamiltonian resembles the corresponding one for the spin glass model. In this sense the disorder in the globule is self- generated (in contrast to spin glasses) and can be related with competing interactions (virial coefficients of different signs) and the chain connectivity. The work is aimed at giving a quantitative description of this analogy. We have investigated in the mean-field (MF) approximation the phase diagram of the homopolymeric globule where the transition line from the liquid to glassy globule is treated in terms of the replica symmetry breaking paradigm. The configurational entropy temperature dependence is also discussed. (C) 2002 Elsevier Science B.V. All rights reserved.