Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2004-10-26
Nano Letters 5, 1093 (2005)
Physics
Condensed Matter
Soft Condensed Matter
5 pages, 3 figures
Scientific paper
10.1021/nl050623g
Electronic transport through DNA wires in the presence of a strong dissipative environment is investigated. We show that new bath-induced electronic states are formed within the bandgap. These states show up in the linear conductance spectrum as a temperature dependent background and lead to a crossover from tunneling to thermal activated behavior with increasing temperature. Depending on the strength of the electron-bath coupling, the conductance at the Fermi level can show a weak exponential or even an algebraic length dependence. Our results suggest a new environmental-induced transport mechanism. This might be relevant for the understanding of molecular conduction experiments in liquid solution, like those recently performed on poly(GC) oligomers in a water buffer (B. Xu et al., Nano Lett 4, 1105 (2004)).
Cuniberti Gianaurelio
Gutierrez Raul
Mandal Soumen
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