Effect of an out-of-plane cross connection on the electronic transport of zigzag graphene nanoribbon

► Transport properties of out-of-plane GNR intersections which constructs from one zigzag GNR and one armchair GNR were studied. ► The effect of the inter-distance, an external bias and the stacking types on the transport properties has been studied. ► The inter-distance is found to affect the transport properties strongly, even under an external bias. ► The stacking configuration between the two GNRs is found to be crucial for the electronic transport under external bias.