Gutiérrez, Rafael and Mandal, S. and Cuniberti, Gianaurelio (2005) Quantum transport through a DNA wire in a dissipative environment. Nano Letters 5 (6), pp. 1093-1097.
Other URL: http://dx.doi.org/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 band gap. 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 environmentally induced transport mechanism. This might be relevant for the understanding of molecular conduction experiments in liquid solution, such as those recently performed on poly(GC) oligomers in a water buffer (B. Xu et al., I>Nano Lett/I>. B>2004/B>,I> 4/I>, 1105).
|Institutions:||Physics > Institute of Theroretical Physics > Retired Professors > Group Gianaurelio Cuniberti|
|Projects:||EU Grant: DNA-based molecular nanowires, Graduiertenkolleg Nichtlinearität und Nichtgleichgewicht, Volkswagen Stiftung: Molecular Computing|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 21:01|