Conductance of DNA molecules: Effects of decoherence and bonding
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 [ M. Zilly, O. Ujsághy and D. E. Wolf 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 [ K. Senthilkumar, F. C. Grozema, C. F. Guerra, F. M. Bickelhaupt, F. D. Lewis, Y. A. Berlin, M. A. Ratner and L. D. A. Siebbeles 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.
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