▎ 摘　　要

In this paper, the electronic band structures and its transport properties in gapped graphene superlattices, with one-dimensional periodic potentials of square barriers, are systematically investigated. It is found that a zero-averaged wave-number (zero-(k) over bar) gap is formed inside gapped graphene-based superlattices, and the condition for obtaining such a zero-(k) over bar gap is analytically presented. The properties of this zero-(k) over bar gap including its transmission, conductance and Fano factor are studied in detail. Finally, it is revealed that the properties of the electronic transmission, conductance, and Fano factor near the zero-(k) over bar gap are very insensitive to structural disorder for finite graphene- based periodic-barrier systems. (C) 2011 American Institute of Physics. [doi:10.1063/1.3525270]