%0 Journal Article
%A Díaz García, Elena
%A Sedrakyan, A.
%A Sedrakyan, D.
%A Domínguez-Adame Acosta, Francisco
%T Absence of extended states in a ladder model of DNA
%D 2007
%@ 1098-0121
%U https://hdl.handle.net/20.500.14352/51246
%X We consider a ladder model of DNA for describing carrier transport in a fully coherent regime through finite segments. A single orbital is associated to each base, and both interstrand and intrastrand overlaps are considered within the nearest-neighbor approximation. Conduction through the sugar-phosphate backbone is neglected. We study analytically and numerically the spatial extend of the corresponding states by means of the Landauer and Lyapunov exponents. We conclude that intrinsic-DNA correlations, arising from the natural base pairing, does not suffice to observe extended states, in contrast to previous claims.
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