Backbone-induced semiconducting behavior in shortwires
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- 24 June 2002
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (24)
- https://doi.org/10.1103/physrevb.65.241314
Abstract
We propose a model Hamiltonian for describing charge transport through short homogeneous double stranded DNA molecules. We show that the hybridization of the overlapping pi orbitals in the base-pair stack coupled to the backbone is sufficient to predict the existence of a gap in the nonequilibrium current-voltage characteristics with a minimal number of parameters. Our results are in a good agreement with the recent finding of semiconducting behavior in short poly(G)-poly(C) DNA oligomers. In particular, our model provides a correct description of the molecular resonances which determine the quasi-linear part of the current out of the gap region.Comment: 4 pages, 3 figureKeywords
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