Building of graphene pn junction

[rabort]

hallo sir,
                how to build the graphene pn junction in atk 12.2.2,
               i build 15*1 nm graphene sheet and doping has been done by moddify the script as " charge=0.07" --- this is P type ,
                                                                                                                                              and   "charge=-0.07" --- this in N type,
               P type and N type are verified by using Band Structures.
            then how to join both P and N type materials and how to build Pn junction.
         please send me any tutorial is there.
                                                                                  thanks for your reply   

[Anders Blom]

Rather than "joining" the doped regions, you should approach the problems as usual when constructing a device, and set it up without doping. Then, once the device model is eastablished, incl. the DeviceCalculator, you edit the Python script and add the "charge" keywords to the electrode calculators.

[rabort]

thanks for your replay sir.....,
                            joining of two reagions means -- in "Builder"  by using of "merg cell"? is it correct,  
                                                                              

[Anders Blom]

I don't know enough about your system to say for sure, but that's one option, yes.