Hello, communitors

Actually, i asked band structure of monolayer graphene to you guys

I fixed space group as P6/MMM (hexagonal structure) and  also generate the k-path value, which is widely used (gamma, K, M)

Gamma : 0.000 0.000 0.000/ K : -0.333 0.667 0.000/ M : 0.000 0.500 0.000

I calculated the monolayer graphene with GGA/PBE with DFT semi-core potential  and 16X16X1 k-points. However, i still have a problem for the band gap.

The result from this calculation showed that the band gap for monolayer graphene is not zero. ( band gap = 0.100 Ha)

Therefore, i'm very confused how can i do that calculation for getting zero band gap

Does someone has great idea to solve this problem??

I really need you guys help

P.S  I attached my supercell and brillouin zone files for graphene (my material studio version is 5.51)