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Abstract
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In this paper, we study electrical properties of AB-stacked bilayer graphene-DNA hybrid nanostructure
connected to two semi-infinite monolayer graphene nanoribbon leads. We investigated
two types of devices with both zigzag and armchair edges and the results are evaluated by
replacing the junction position. Our calculations are based on the tight-binding approximation
and the Green’s function method in which the electrical transmission, the density of states (DOS)
and the local density of states (LDOS) are calculated numerically. In the metallic bilayer graphene
device via creating a nanopore and translocating the DNA molecule, the electron transmission
reduces and an energy gap opens, so that, the metal-semiconductor phase transition occurs. Also,
our results indicate that the model AC leads to a more considerable energy gap than model AB.
Our results have important applications in DNA sensing.
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