Abstract
We study the low-temperature transition of polymers with attractive nearest-neighbor interactions on a square lattice. Measuring the specific heat obtained by using the exact number of possible conformations for each energy value, we find a peak in the low-temperature region, distinct from the peak corresponding to the coil-globule transition. We find that the low-temperature peak becomes prominent for specific polymer lengths called the magic lengths, for which the ground state forms a square or a rectangle. The low-temperature peaks for magic lengths are more intense than those for other lengths and appear at lower temperatures.
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Lee, J.H., Lee, J. & Kim, SY. Low-temperature conformational transition of a square-lattice polymer. Journal of the Korean Physical Society 66, 1797–1801 (2015). https://doi.org/10.3938/jkps.66.1797
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DOI: https://doi.org/10.3938/jkps.66.1797