Dear Anders Sir,
The reason I wanted to know about the energy band diagram for an infinite graphene sheet(as you rightly said) was to verify about periodic boundary condition due to some discrepancy I found by looking at the band-gap. I found the following contradiction which made me do the exercise:
When I change the width and do transport calculations keeping periodic boundary condition I expected that the current increases in the same ratio as the width. But what I found that this trend did not follow. I fail to understand that if I have periodic boundary condition then the current/width ratio should had been constant. Please help me understand what am I missing in here.
PFA the python files.
