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The Kubo formula for the electrical conductivity of per stratum of few-layer graphene,up to five, is analytically calculated in both simple and Bernal structures within thetight-binding Hamiltonian model and Green's function technique, compared with the single-layer one. The results show that, by increasing the layers of the graphene as wellas the interlayer hopping of the nonhybridized p z orbitals, this conductivity decreases. Although the change in its magnitude varies less as the layer number increases to beyond two,distinguishably, at low temperatures, it exhibits a small deviation from linearbehavior. Moreover, the simple bilayer graphene represents more conductivity with respect tothe Bernal case.

Flake Electrical Conductivity of Few-Layer Graphene