I'm using vasp.5.3.5 and having problem when calculating dielectric constant with spin-orbit coupling. While the band structure w/ spin-orbit is almost identical to that w/o spin-orbit. The dielectrics are completely different.
Any explanation for the difference?
Thanks
To calculate epsilon I use:
LOPTICS = T
LRPA = T
for spin-orbit calculation I add:
LSORBIT = T
The link below is the imaginary part of epsilon.

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