Díaz García, ElenaSedrakyan, A.Sedrakyan, D.Domínguez-Adame Acosta, Francisco2023-06-202023-06-202007-011098-012110.1103/PhysRevB.75.014201https://hdl.handle.net/20.500.14352/51246© 2007 The American Physical Society. Work at Madrid was supported by MEC Project FIS2006-01485. D.S. and A.S. acknowledges INTAS grant 03-51-5460 for partial financial support.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.engjournal articlehttp://dx.doi.org/10.1103/PhysRevB.75.014201http://journals.aps.orgopen access538.9Metal-Insulator-TransitionCorrelated DisorderElectronic TransportAnderson ModelScaling TheoryLocalizationDelocalizationSequencesMoleculesStrandFísica de materiales