While trying to obtain the output characteristics for a gnrfet(made with doped zigzag gnr) i was not able to obtain the desired characteristics.i have attached the characteristics that i am obtaining for the same.could you please help me out in this matter.the output chara to be obtained is one where the current saturates after some point(as is observed in all gnrfets),but for me its the same characteristics as the transfer characteristics..what could be the MISTAKE that i might be making during the simulations....