▎ 摘　　要

The linear dispersion law of graphene is modified in periodically gated structures, the charge carriers acquiring a finite effective mass. We show that, in the low energy approximation, periodically gated graphene structures are equivalent, from the point of view of charge transport, to a bilayer-like gated graphene region, i.e., to a material that satisfies the same equation as bilayer graphene but with a potentially different effective mass. The hypothetic bilayer-like material becomes identical to the genuine bilayer graphene if its effective mass matches that of the latter. The effective mass, potential energy, and width of bilayer-like graphene can be identified by imposing the condition that the transmission coefficient through the bilayer-like region, computed using a transfer matrix approach, is identical to that through the periodically gated graphene structure. (C) 2014 AIP Publishing LLC.