Quantum transport through a DNA wire in a dissipative environment
Abstract
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)).
Cite
@article{arxiv.cond-mat/0410660,
title = {Quantum transport through a DNA wire in a dissipative environment},
author = {R. Gutierrez and S. Mandal and G. Cuniberti},
journal= {arXiv preprint arXiv:cond-mat/0410660},
year = {2007}
}
Comments
5 pages, 3 figures