Maciá Barber, Enrique AlfonsoTriozon, FrançoisRoche, Stephan2023-06-202023-06-202005-031098-012110.1103/PhysRevB.71.113106https://hdl.handle.net/20.500.14352/52109©2005 The American Physical Society. This work was partly supported by UCM through Project No. PR3/04-12450, the Ministerio de Educación y Ciencia through Project No. FIS2004-00067, the consejería de Educación de la CAM and European Union FEDER through Project No. GR/MAT/0768/2004.We report on theoretical results about contact-dependent effects and tunneling currents through DNA molecules. A tetranucleotide PolyGACT chain, connected in between metallic contacts, is studied as a generic case, and compared to other periodic sequences such as PolyAT or PolyGC. Remarkable resonance conditions are analytically derived, indicating that a strong coupling does not always result in a larger conductance. This result is properly illustrated by considering intrinsic features of bias-dependent tunneling currents in the coherent regime.engjournal articlehttp://dx.doi.org/10.1103/PhysRevB.71.113106https://journals.aps.orgopen access538.9Charge-transportElectrical-transportLambda-DNAConductivityElectrodeDisorderModelPairsWireFísica de materialesFísica del estado sólido2211 Física del Estado Sólido