  Sublattices A and B are opposite in the decay direction of the edge state of
the zigzag graphene ribbon (ZGR). Detecting exponential growth from the zigzag
edges to the ZGR center remains challenging. The tight-binding model
calculations in this letter reveal that interlayer conductance manifests this
growth in parallel contact with the armchair nanotube. The transfer integrals
of oblique interlayer bonds are comparable to those of vertical interlayer
bonds. However, the phase of the ZGR wave function strongly suppresses the
contribution of oblique bonds, allowing the selective detection of the growing
component.
