Three-Terminal Transport of Nonsymmetric T-Shaped Graphene Nanoribbons

In order to explore the transport properties of nonsymmetric three-terminal T-shaped graphene nanoribbons (GNRs) devices,the nonequilibrium Green’s function method and Landauer-Buttiker formula were adopted. It shows that the transport properties of T-shaped GNRs are highly sensitive to the details of the leads. The T-shaped GNRs show metallic characteristics when electrons transmit from the metallic GNRs lead to the metallic GNRs lead, while the T-shaped GNRs show semiconducting characteristics when electrons transmit from the metallic GNRs lead to the semiconducting GNRs lead. The conductance between the random two leads can be adjusted by varying the size of the leads.