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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2010.03.25

Exact master equation for nano-systems: applications to charge transport through DNA oligomers

M. W.-Y. Tu, M. Lee, S. Avdoshenko, D. Nozaki, R. Gutierrez, and G. Cuniberti

DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM)
DPG Spring Meeting of the Section Condensed Matter (SKM)

2010.03.25; (H 21) Regensburg, Germany

We present a formally exact master equation derived with the help of the Feynmann-Vernon's influence functional theory and a timedependent 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 realtime 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.

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