I declared a new contact above the drift/pwell interface as depicted in the attached image using Sprocess.

Then added the command { name="Kpoint" Voltage= 0.0 } to the electrode section in Sdvice, I did both IdVg and IdVd sweeps. But, the potential at the "Kpoint" electrode remains null.

I want to get similar results to the ones in the image attached.

How to proceed?!