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Electronic structure and transport properties of double-stranded Fibonacci DNA

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Maciá Barber, Enrique Alfonso (2006) Electronic structure and transport properties of double-stranded Fibonacci DNA. Physical review B, 74 (24). ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.74.245105


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Abstract

We consider a class of synthetic DNA molecules based on a quasiperiodic arrangement of their constituent nucleotides. Making use of a two-step renormalization scheme the double-stranded DNA molecule is modeled in terms of a one-dimensional effective Hamiltonian, which includes contributions from the nucleobase system, the sugar-phosphate backbone, and the environment. Analytical results for the energy spectrum structure and Landauer conductance of Fibonacci DNA approximants are derived and compared with those corresponding to periodic polyGACT-polyCTGA chains. The main effect of quasiperiodic order is the emergence of a highly fragmented energy spectrum, introducing a characteristic low-energy scale in the electronic structure of aperiodic DNA chains. The presence of a series of high-conductance peaks in the transmission spectra of Fibonacci approximants indicates the existence of extended states in these systems. These results open perspectives for experimental work in nanodevices based on synthetic DNA.


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Additional Information:

©2006 The American Physical Society.
I warmly thank E. Artacho, R. Gutiérrez, S. Roche, and E. B. Starikov for sharing useful information. I acknowledge M. V. Hernández for a critical reading of the manuscript. This work has been supported by the Universidad Complutense de Madrid through Project No. PR27/05-14014-BSCH.

Uncontrolled Keywords:Long-range correlations; Metal-insulator-transition; Quasi-periodic lattices; Tight-binding model; Charge-transport; Electrical-transport; Double helix; Lambda-DNA; Localization properties; Correlated disorder
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:44585
Deposited On:29 Sep 2017 17:16
Last Modified:29 Sep 2017 17:16

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