[Wien] Graphene bandstructure

[Islam, Md F]

Hi,

     I am trying to do a bandstructure calculation of graphene to check if I can
reproduce results discussed in literature (I am using a unit cell of 2 atoms). 
With spin-orbit coupling, there should be a gap of the order of few micro-eV
and without spin-orbit, there should not be any gap at Dirac point. But I am 
getting a gap of meV even without spin-orbit. I tried both GGA and LDA with 
very dense mesh but the gap does not close. So I am wondering if anyone 
have any suggestion about how to do it in Wien2k.


Thanks,
Fhokrul