Article,

The DNA electronic specific heat at low temperature: The role of aperiodicity

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PHYSICS LETTERS A, 376 (35): 2413-2417 (2012)
DOI: 10.1016/j.physleta.2012.05.058

Abstract

The electronic specific heat spectra at constant volume (C-V) of a long-range correlated extended ladder model, mimicking a DNA molecule, is theoretically analyzed for a stacked array of a double-stranded structure made up from the nucleotides guanine G. adenine A. cytosine C and thymine T. The role of the aperiodicity on C-V is discussed, considering two different nucleotide arrangements with increasing disorder, namely the Fibonacci and the Rudin-Shapiro quasiperiodic structures. Comparisons are made for different values of the band fillings, considering also a finite segment of natural DNA, as part of the human chromosome Ch22. (C) 2012 Elsevier B.V. All rights reserved.

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