[Wannier] Spin Hall conductivity

[Stepan Tsirkin]

Dear Bipin,

First of all, I guess you have a typo in the message subject, example 18 
is about anomalous Hall conductivity (AHC), not spin Hall.

Usually AHC needs a dense grid of k-points to converge, most probably 
the grid  25x25x25 form example18 is too far from convergence.  With a 
more dense grid you will get a reasonable result.

If you calculate AHC for a series of Fermi levels (using parameters 
fermi_energy_min, fermi_energy_max, fermi_energy_step) , you will see 
huge spikes in the curve, which will disappear for a dense curve, smth 
like this: http://wannier-berri.org/exampleFe.html#id9

You may also check the WannierBerri code, which is much faster for AHC 
and some other calculations.

Regards,

Stepan.

On 26.10.20 18:12, Bipin Lamichhane wrote:
> Dear wannier users,
> I am trying to complete example18 of the wannier tutorial but I got 
> some errors if I do not specify fermi energy in the .win file. The 
> error is '' Must specify one or more Fermi levels when berry=true''. 
> Now When I specify fermi energy as fermi_energy = [value], I get very 
> high Hall conductivity along Z-direction and there are some in x and y 
> directions. If anyone has done this problem, please help me to figure 
> out this issue. Thank You.
>
>
> Sincerely,
> Bipin
>
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