If your k-mesh is not dense enough such that there is no k-point at the VBM and/or CBM or close to, then :GAP will be larger than the band gap from a band structure.
F. Tran On Wed, 9 Dec 2015, Muhammad Sajjad wrote:
Dear AllDoes the command "grep GAP *.scf" gives correct band gap value? as when I found the bottom of conduction band in xmgrace it is higher. (bottom of CB is read correctly by opening the plot in xmgrace and then read the date by editing in text editor). -- Kind Regards Muhammad Sajjad Post Doctoral Fellow KAUST, KSA.
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