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Kinetic study for hopping conduction through DNA molecules
Recent experiments indicated that disorder effect in DNA may lead to a
transition of the charge transport mechanism from band resonant tunnelling to
thermal activated hopping. In this letter, based on Mott's variable-range
hopping theory we present a kinetic study for the charge transport properties
of DNA molecules. Beyond the conventional argument in large-scale systems, our
numerical study for finite-size DNA molecules reveals a number of unique
features for (i) the I-V characteristics, (ii) the temperature and length
dependence, and (iii) the transition from conducting to insulating behaviors.Comment: 3 pages, 3 figures, submitted to Appl. Phys. Let
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