[Wannier] Postw90 and Berry curvature origin

[Vahid Askarpour]

Dear Wannier90 Users,

Looking at the postw90 background paper (PRB74, 195118, 2006), in Fig. 3a, there is a large spike and several small spikes for the Berry curvature in Fe. The large peak is attributed to spin-orbit coupling with states above and below E_F. However, both small and large peaks produce small energy denominators in Eq. 31. This might be obvious to many but  why is the peak due to spin-orbit much larger than the other peaks?

Thanks,
Vahid

Vahid Askarpour
Department of Physics and Atmospheric Science
Dalhousie University,
Halifax, NS
CANADA