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TT: Fachverband Tiefe Temperaturen

TT 16: TR: Nanoelectronics III - Molecular Electronics 1

TT 16.3: Talk

Monday, March 14, 2011, 18:45–19:00, HSZ 03

Conductance of DNA molecules: Effects of decoherence and bonding — •Matías Zilly¹, Orsolya Ujsághy², and Dietrich E. Wolf¹ — ¹Department of Physics and CeNIDE, University of Duisburg-Essen, 47048 Duisburg, Germany — ²Department of Theoretical Physics and Condensed Matter Research Group of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, Budafoki út 8., 1521 Budapest, Hungary

The influence of decoherence and bonding on the linear conductance of single double-stranded DNA molecules is examined by fitting a phenomenological statistical model developed recently (Eur.Phys.J.B 68, 237 (2009)) to experimental results. The DNA molecule itself is described by a tight binding ladder model with parameters obtained from published ab initio calculations (J.Am.Chem.Soc. 127, 14894 (2005)). The good agreement with the experiments on sequence and length dependence gives a hint on the nature of conduction in DNA and at the same time provides a crucial test of the model.