Fermi velocity

[Roc2019]

Dear Sir,

 I know it is easy to obtian the fermi velocity at a specific k point from the tutorial. 
https://docs.quantumatk.com/manual/Types/calculateVelocity/calculateVelocity.html

However,  how to calculate and plot the Fermi verlocity in 2D and 3D BZ space like the attachment of MgB2 ?   

Thank you so much.

[Tue Gunst]

Hi,
There is a FermiSurface analysis object:
https://docs.quantumatk.com/manual/Types/FermiSurface/FermiSurface.html

When opening the result in the Viewer analyzer in nanolab then open the "Fermi Surface" menu.
This will allow you to tick on "color by gradient" and choose a suitable colormap.
An example for Ruthenium of Fermi-surfaces and the contribution from individual bands can be seen here:
https://arxiv.org/abs/2001.02216