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Specific heat spectra for quasiperiodic ladder sequences

Author

Listed:
  • D. A. Moreira
  • E. L. Albuquerque
  • C. G. Bezerra

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

Suggested Citation

  • D. A. Moreira & E. L. Albuquerque & C. G. Bezerra, 2006. "Specific heat spectra for quasiperiodic ladder sequences," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 54(3), pages 393-398, December.
    • Handle: RePEc:spr:eurphb:v:54:y:2006:i:3:p:393-398
    DOI: 10.1140/epjb/e2007-00001-3
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