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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