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Dynamical conductance of model DNA sequences

J. Chem. Phys. 125, 164704 (2006); doi:10.1063/1.2359447

Published 24 October 2006

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Wei Ren and Jian Wang
Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China and Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China

Zhongshui Ma
Department of Physics, Beijing University, Beijing, People's Republic of China 100871

Hong Guo
Center for the Physics of Materials, McGill University, Montreal, Quebec H3A 2T8, Canada and Department of Physics, McGill University, Montreal, Quebec H3A 2T8, Canada
Using a tight binding model, we have investigated charge transport in model DNA sequences under external ac bias. The numerical results of emittance for several model DNA sequences are found to be well described by an analytical formula, especially when the dynamic response is inductivelike. This formula can be understood from general considerations of scattering matrix theory. The temperature dependence of emittance is also studied numerically within the tight binding model, and dynamic response of the model DNA sequences can change from inductivelike to capacitivelike as temperature is varied. ©2006 American Institute of Physics
History: Received 10 July 2006; accepted 8 September 2006; published 24 October 2006
Permalink: http://link.aip.org/link/?JCPSA6/125/164704/1
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KEYWORDS and PACS

Keywords
PACS
  • 87.14.Gg
    DNA, RNA
  • 87.15.Aa
    Theory and modeling in molecular biophysics; computer simulation
  • 87.15.Cc
    Folding and sequence analysis of biomolecules
  • YEAR: 2006

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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