As we know, in semi metals valence and conduction band states overlap with each other. Then, at different high symmetry points, we have different no. of filled bands. Suppose with SOC, at L point 16 bands are filled, at Gamma point 12 bands are filled and at X point 18 bands are filled and band inversion is only taking place on X point. Then how should we choose the no. of filled bands to calculate the parity of topological semi metals.

Can somebody please put some light on it.

Thanks in advance!

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