Electronic Specific Heat of DNA: Effects of backbones and disorder

Abstract

In this present work we report the results of our investigation on the electronic specific heat (ESH) of DNA molecule modelled within the tight-binding framework. We take four different DNA sequences ranging from periodic, quasi-periodic to random and studied both ESH and also the density of states to supplement our ESH results. The role of the backbone structure and the effectsof environment on ESH are discussed. We observe that irrespective of the sequences there is auniversal response of the ESH spectra for a given disorder. The nature of response of specific heaton backbone disorder is totally opposite in low and high temperature regimes.

arXiv comment7 pages, 7 figures

References in corpus (4)

• Insulating behavior of lambda-DNA on the micron scale
• Backbone-induced semiconducting behavior in short DNA wires
• Electronic Transport in DNA
• Localization phenomena in a DNA double helix structure : A twisted ladder model

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• Conformation dependent electronic transport in a DNA double-helix
• Electronic transport in single-helical protein molecules: Effects of multiple charge conduction pathways and helical symmetry
• Bias driven circular current in a ring nanojunction: Critical role of environmental interaction