Phys. Rev. Lett. 85, 1572–1575 (2000)Pulling Pinned Polymers and Unzipping DNAReceived 31 March 2000; published in the issue dated 14 August 2000 We study a class of micromanipulation experiments, exemplified by the pulling apart of the two strands of double-stranded DNA. When the pulling force is increased to a critical value, an “unzipping” transition occurs. For random DNA sequences with short-ranged correlations, we obtain exact results for the number of monomers liberated and the specific heat, including the critical behavior at the transition. Related systems include a random heteropolymer pulled away from an adsorbing surface and a vortex line in a type II superconductor tilted away from a fragmented columnar defect. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.1572
DOI:
10.1103/PhysRevLett.85.1572
PACS:
87.15.-v, 05.10.Gg, 68.35.Rh, 87.80.Fe
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