Abnormal electronic transport in disordered four-terminal graphene nanodevice

In this paper, a numerical study of quantum transport in a disordered four-terminal graphene nanodevice isinvestigated based on the Landauer approach. The effects of impurity on transmission coefficient of the electroninjected into the system are studied using tight-binding model. In this manner, we emphasize that when thedisorder density is sufficiently large, the transmission coefficients and the current reduce due to multiscatteringphenomenon. We have found that the perfectly conducting channel develops in four-terminal device in its zigzagedge if the range of impurity gets exponentially wider. The theoretical results obtained can be a base for thedevelopment in designing graphene nanodevice.

کلیدواژه ها:

Quantum transport ، Graphene nanodevice ، Transmission coefficient