Publication: Electrical conductance in duplex DNA: Helical effects and low-frequency vibrational coupling
Loading...
Official URL
Full text at PDC
Publication Date
2007-12
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
In this work we consider the combined effect of helical structure and base-pair twist motion on charge transfer through duplex DNA at low temperatures. We present a fully analytical treatment of charge-lattice coupled dynamics in terms of nearest-neighbor tight-binding equations describing the propagation of the charge through an effective linear lattice for certain frequency values. The corresponding effective hopping terms include both helicoidal and dynamical effects in a unified way. Although base-pair motion generally reduces pi-pi stack overlapping, the coupling to certain normal modes gives rise to a significant improvement of the Landauer conductance.
Description
Ā©2007 The American Physical Society.
I warmly thank Alexander Voityuk for useful comments. I acknowledge M. V. HernƔndez for a critical reading of the manuscript. This work has been supported by the Universidad Complutense de Madrid through Project No. PR27/05- 14014-BSCH.