On the 4-point conductance of graphene nanoribbons

In this contribution we provide our preliminary computational results on the 4-point conductance properties of GNR-based nanojunctions. We assume defect-free GNRs at zero or low temperatures and study how their ballistic conductance depends on the GNR's dimensions. We note that in recent years advances in nanotechnology allowed to fabricate atomically precise GNRs [6] so that defect-free GNRs are not merely an idealisation. Among our results we determine an optimal GNR size which in the low temperature limit provides maximal values of the computed four-point electrical conductance matrix elements. (authors)