Specific heat spectra for quasiperiodic ladder sequences

D. A. Moreira, E. L. Albuquerque () and C. G. Bezerra

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 54, issue 3, 393-398

Abstract: We performed a theoretical study of the specific heat C(T) as a function of the temperature for double-strand quasiperiodic sequences. To mimic DNA molecules, the sequences are made up from the nucleotides guanine G, adenine A, cytosine C and thymine T, arranged according to the Fibonacci and Rudin-Shapiro quasiperiodic sequences. The energy spectra are calculated using the two-dimensional Schrödinger equation, in a tight-binding approximation, with the on-site energy exhibiting long-range disorder and non-random hopping amplitudes. We compare the specific heat features of these quasiperiodic artificial sequences to the spectra considering a segment of the first sequenced human chromosome 22 (Ch22), a real genomic DNA sequence. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 82.60.Qr Thermodynamics of nanoparticles, 87.14.Gg DNA, RNA, 87.15.Aa Theory and modeling; computer simulation, 89.75.Da Systems obeying scaling laws, (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2007-00001-3

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