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Fluctuation effects on microphase separation in a random copolymer Hamiltonian

C D Sfatos, A M Gutin and E I Shakhnovich

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We investigate the effect of fluctuations in the effective Hamiltonian that describes the microphase separation in random copolymers. This Hamiltonian is previously studied on the level of mean-field theory where a phase transition to a phase with periodic microdomain structure was predicted. It is shown that the one-loop treatment of fluctuations is exact in the thermodynamic limit and that the phase predicted by the mean field is unstable within the framework of the studied Hamiltonian.


PACS

05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion

05.70.Fh Phase transitions: general studies

64.75.-g Phase equilibria

MSC

82B41 Random walks, random surfaces, lattice animals, etc. (See also 60G50, 82C41)

82B26 Phase transitions (general)

Subjects

Soft matter, liquids and polymers

Statistical physics and nonlinear systems

Dates

Issue 12 (21 June 1994)



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