[Pw_forum] Spacing in band structure

[Resul Eryigit]

Naol Regassa wrote:
> Hello everyone
>
> We were drawing band structure for the hexagonal crystal structure
> along the path Г-M-K-Г-A. when I want to make the spacing between M-K
> narrower and  Г-M wider, I increase the number of k-points along Г-M
> and decrease the k-points from M-K but it didn't work. No matter what
> density of k-points I made the spacing between the high symmetry
> points does not vary the way that I want? Is this related with the
> application that I am using i.e 'Image Magic'  What do you advice me
> then? On the way let me add one question. How can remove the dots on
> the band structure so that it will be smooth?
> NB: I am facing the same problem on the phonon dispersion.
>   

dear naol..
the distance between two special points is fixed by the geometry of the
first brillouin zone
and for the hexagonal 1BZ the length of \Gamma-M=1/(sqrt(3) a) and
the length of M-K=1/(3 a) where a is the basal lattice constant. you can
extract
energy values and plot them wrt to k-point number (instead of k-length)
to have wider or
narrower looking segments, but that would not be meaningful.

resul

> Naol
> Addis Ababa University, Materials science programe
> East Africa (Ethiopia)
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