▎ 摘　　要

We report a theoretical investigation of the impact of asymmetry in the geometry of graphene nanoribbons (GNR) on the current-voltage characteristics caused by introducing the structural defects using ab initio methods. Only the most possible structural defects were considered: mono vacancy, Stone-Wales (SW) defect with different orientation, and partial hydrogen passivation on the GNR surface. It is found that in case of SW defects the value of current is four times higher at the negative voltage than in case of structures with mono vacancy defect. Also, the impact of orientation of the SW defect on the I-V characteristics was studied. (C) 2014 AIP Publishing LLC.