▎ 摘　　要

The quantum conductance oscillations of the electron interferometers composed of two types of graphene nanoribbons (GNRs), i.e. zigzag and metallic armchair edge GNRs, have been calculated by using a tight-binding-based Green's function approach. It is shown that, unlike in single-walled carbon nanotube (SWNT) interferometers, the GNRs have only the fast conductance oscillation period, no slow conductance oscillation period was found for these two types of GNRs (there are two conductance oscillation periods, i.e. fast and slow ones, existing in SWNT interferometers). It is also found that the metallic armchair edge GNRs have invariable conductance oscillation periods near the Dirac point, while the conductance oscillation of the zigzag edge GNRs quickens with decreasing vertical bar E-F vertical bar (Fermi energy) and especially becomes faster near the Dirac point. All these results agree well with those of experimental observations. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim