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

• Autor(a) principal: Sarmento, R.G.
• Data de Publicação: 2012
• Outros Autores: Mendes, G.A., Albuquerque, Eudenilson Lins de, Fulco, Umberto Laico, Vasconcelos, Manoel Silva de, Ujsághy, O., Freire, V.N., Caetano, E.W.S.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/30162
• topic: DNA molecule; Electronic density of states; Electronic specific heat; Quasiperiodic structures

The electronic specific heat spectra at constant volume (CV ) 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 CV 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.