▎ 摘　　要

We study the quantum transport property in a gapped graphene-based normal metal-insulator-superconductor junctions (NG/IG/SG), in the limit of a thin barrier. The charged fermions in NG/IG/SG structure are treated as massive relativistic particles. Based on Andreev and normal reflections in normal-superconductor graphene-based junction and BTK formalism, the tunneling conductance's in terms of some different electrostatic superconductor. U-0 and barrier, V-0 potential are obtained. Using the experimental based values of the Fermi energy in the NG and SG (E-FN and E-FN + U-0, respectively), energy gap in graphene (2mv(F)(2)) and superconducting order parameter, Delta, it is shown that the conductance spectra of such system represent a new behavior, i.e. if we take vertical bar E-FN - mv(F)(2)vertical bar -> 0, it becomes as a step function of V-0. This behavior of charge transportation can be considered as a nano switch. (C) 2010 Elsevier B.V. All rights reserved.