Specific heat spectra for quasiperiodic ladder sequences
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
Year of publication: |
2006
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Authors: | Moreira, D. A. ; Albuquerque, E. L. ; Bezerra, C. G. |
Published in: |
The European Physical Journal B - Condensed Matter and Complex Systems. - Springer. - Vol. 54.2006, 3, p. 393-398
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Publisher: |
Springer |
Subject: | 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 |
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