<div dir="ltr">Thanks a lot. Actually i did used 'crystal_b' and xcrysden to define high symmetry points. I was not able to get output from 'plotband.x' thatswhy i was worried. Thanks again for your help in understanding the 'band.dat.gnu' output format, now i can draw the corresponding k-pts.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 3, 2019 at 4:49 PM <<a href="mailto:dv009200@fh-muenster.de">dv009200@fh-muenster.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">If you use the crystal_b or tpiba_b option to generate your k-point path<br>
in the 1st irreducible Brillouin Zone its relatively easy to find the x<br>
coordinates of the high symmetry k-points in the dat.gnu file that is<br>
generated by the bands.x code.<br>
<br>
For example take the Gamma-X-W-K-Gamma-L-W path I have used for ZnS<br>
(zincblende structure) with 10 intermediate points between the high<br>
symmetry points (have a look at the pw.x input description for an<br>
explanation of the crystal_b or tpiba_b option):<br>
<br>
K_POINTS (crystal_b)<br>
7<br>
0.000 0.000 0.000 10 !G<br>
0.500 0.500 0.000 10 !X<br>
0.750 0.500 0.250 10 !W<br>
0.750 0.375 0.375 10 !K<br>
0.000 0.000 0.000 10 !G<br>
0.500 0.500 0.500 10 !L<br>
0.750 0.500 0.250 10 !W<br>
<br>
The dat.gnu file contains for this example 61 corresponding x (kx) and y<br>
(Energy) values for each band that is calculated. The 1st point that is<br>
listed for each band is the Gamma point, the 11th point is the X-point,<br>
the 21st point is the W-point and so on. So there you can directly read<br>
the corresponding x-values for the high symmetry points you have chosen.<br>
<br>
Hopefully this helps.<br>
<br>
For the generation of the k-point path along these high symmetry points I<br>
can highly recommend XCrySDen to you (<a href="http://www.xcrysden.org/" rel="noreferrer" target="_blank">http://www.xcrysden.org/</a>).<br>
<br>
Best Regards<br>
<br>
Dominik<br>
<br>
M.Sc. Dominik Voigt PhD Student<br>
Münster University of Applied Sciences<br>
Email: <a href="mailto:dv009200@fh-muenster.de" target="_blank">dv009200@fh-muenster.de</a><br>
<br>
> I recently calculated bands using qe. I am able to plot them using gnuplot<br>
> but i am unable to find high symmetry k-point's x coordinates in<br>
> "band.out"<br>
> file. I also tried "plotband.x" but it is showing error, "error reading<br>
> k-pt #2".<br>
> So is there any other way of getting x-coordinates of high symmetry kpts<br>
> for band plot and is anything wrong in my "band.out" file?<br>
> _______________________________________________<br>
> users mailing list<br>
> <a href="mailto:users@lists.quantum-espresso.org" target="_blank">users@lists.quantum-espresso.org</a><br>
> <a href="https://lists.quantum-espresso.org/mailman/listinfo/users" rel="noreferrer" target="_blank">https://lists.quantum-espresso.org/mailman/listinfo/users</a><br>
<br>
<br>
_______________________________________________<br>
users mailing list<br>
<a href="mailto:users@lists.quantum-espresso.org" target="_blank">users@lists.quantum-espresso.org</a><br>
<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" rel="noreferrer" target="_blank">https://lists.quantum-espresso.org/mailman/listinfo/users</a><br>
</blockquote></div>