Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 35: TR: Nanoelectronics III: Molecular Electronics 1

TT 35.2: Vortrag

Donnerstag, 25. März 2010, 14:15–14:30, H21

Exact master equation for nano-systems: applications to charge transport through DNA oligomers — •Matisse Wei-Yuan Tu, Myeong Lee, Stanislav Avdoshenko, Daijiro Nozaki, Rafael Gutierrez, and Gianaurelio Cuniberti — Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany

We present a formally exact master equation derived with the help of the Feynmann-Vernon’s influence functional theory and a time-dependent electrical current formula derived from it [1,2]. We study charge transport through a DNA 15-mer connected to electrodes, when a single base mismatch is introduced into it. The electronic structure of the molecule is mapped onto an effective linear tight-binding chain with time-fluctuating electronic parameters drawn from snapshots along molecular dynamics trajectories. By exploring the real-time charge propagation and the dynamical current, we analyse the statistical properties of the current for matched and mismatched DNA oligomers.

[1] Matisse Wei-Yuan Tu and Wei-Min Zhang, Phys. Rev. B 78, 235311(2008).

[2] Jinshuang Jin, Matisse Wei-Yuan Tu, Wei-Min Zhang and YiJin Yan, arXiv:0910.1675.