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

Thursday, 31 January 2008
(at 16:30 in room 115, Hallwachsstr. 3)
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Anomalous current response of DNA wires under stretching and twisting

Bo Song

Dresden University of Technology

By merging DFTB calculation and model-Hamiltonian approaches, we study the stretching-twisting process of poly(GC) DNA. A local maximum of hopping parameter t between two nearest-neighbor GC pairs is found in over-stretching process, which is due to the competition between stretching and twisting. This will lead to a local maximum of current in the case that \Gamma is greater than t. Reducing \Gamma to the case that it is greater than t in some area of the stretching-twisting process and less than t in the other area, we will get the plateau for the current in the region \Gamma < t, and the heights of plateaus are almost equal to each other.

Invited by G. Cuniberti and R. Gutierrez (nanoSeminar)

last modified: 2018.10.24 Mi
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