[QE-users] banduppy for band unfolding

Nicola Marzari nicola.marzari at epfl.ch
Thu Mar 3 09:51:46 CET 2022




Dear Kenneth,


there is a very comprehensive tool to obtain k-point paths that are 
compliant with the guidelines from the international union of 
crystallography - I strongly recommed you use those.

You can find it online here:
https://www.materialscloud.org/work/tools/seekpath

with also links to the paper and the relevant python library.

				nicola


On 02/03/2022 18:04, kenneth senados wrote:
> Dear QE Users,
> 
> I am studying the tutorial files for banduppy used for band unfolding.
> 
> I would like to ask how this "K_POINTS  crystal" below has been 
> generated. I tried kpoints.x but the kpoints below does not match with 
> the output of kpoints.x
> 
> ---------------------------------------------------------------------------------
> K_POINTS crystal
> 84
>    0.00000000    0.00000000    0.00000000    1
>    0.00000000    0.03846154    0.00000000    1
>    0.00000000    0.07692308    0.00000000    1
>    0.00000000    0.11538462    0.00000000    1
>    0.00000000    0.15384615    0.00000000    1
>    0.00000000    0.19230769    0.00000000    1
>    0.00000000    0.23076923    0.00000000    1
>    0.00000000    0.26923077    0.00000000    1
>    0.00000000    0.30769231    0.00000000    1
>    0.00000000    0.34615385    0.00000000    1
>    0.00000000    0.38461538    0.00000000    1
>    0.00000000    0.42307692    0.00000000    1
>    0.00000000    0.46153846    0.00000000    1
>    0.00000000    0.50000000    0.00000000    1
>    0.00000000    0.53846154    0.00000000    1
>    0.00000000    0.57692308    0.00000000    1
>    0.00000000    0.61538462    0.00000000    1
>    0.00000000    0.65384615    0.00000000    1
>    0.00000000    0.69230769    0.00000000    1
>    0.00000000    0.73076923    0.00000000    1
>    0.00000000    0.76923077    0.00000000    1
>    0.00000000    0.80769231    0.00000000    1
>    0.00000000    0.84615385    0.00000000    1
>    0.00000000    0.88461538    0.00000000    1
>    0.00000000    0.92307692    0.00000000    1
>    0.00000000    0.96153846    0.00000000    1
>    0.02272727    0.02272727    0.02272727    1
>    0.02678571    0.02678571    0.00000000    1
>    0.03125000    0.00000000    0.03125000    1
>    0.04545455    0.04545455    0.04545455    1
>    0.05357143    0.05357143    0.00000000    1
>    0.06250000    0.00000000    0.06250000    1
>    0.06818182    0.06818182    0.06818182    1
>    0.08035714    0.08035714    0.00000000    1
>    0.09090909    0.09090909    0.09090909    1
>    0.09375000    0.00000000    0.09375000    1
>    0.10714286    0.10714286    0.00000000    1
>    0.11363636    0.11363636    0.11363636    1
>    0.12500000    0.00000000    0.12500000    1
>    0.13392857    0.13392857    0.00000000    1
>    0.13636364    0.13636364    0.13636364    1
>    0.15625000    0.00000000    0.15625000    1
>    0.15909091    0.15909091    0.15909091    1
>    0.16071429    0.16071429    0.00000000    1
>    0.18181818    0.18181818    0.18181818    1
>    0.18750000    0.00000000    0.18750000    1
>    0.18750000    0.18750000    0.00000000    1
>    0.20454545    0.20454545    0.20454545    1
>    0.21428571    0.21428571    0.00000000    1
>    0.21875000    0.00000000    0.21875000    1
>    0.22727273    0.22727273    0.22727273    1
>    0.24107143    0.24107143    0.00000000    1
>    0.25000000    0.00000000    0.25000000    1
>    0.25000000    0.25000000    0.25000000    1
>    0.26785714    0.26785714    0.00000000    1
>    0.27272727    0.27272727    0.27272727    1
>    0.29464286    0.29464286    0.00000000    1
>    0.29545455    0.29545455    0.29545455    1
>    0.31818182    0.31818182    0.31818182    1
>    0.32142857    0.32142857    0.00000000    1
>    0.34090909    0.34090909    0.34090909    1
>    0.34821429    0.34821429    0.00000000    1
>    0.36363636    0.36363636    0.36363636    1
>    0.37500000    0.37500000    0.00000000    1
>    0.38636364    0.38636364    0.38636364    1
>    0.40178571    0.40178571    0.00000000    1
>    0.40909091    0.40909091    0.40909091    1
>    0.42857143    0.42857143    0.00000000    1
>    0.43181818    0.43181818    0.43181818    1
>    0.45454545    0.45454545    0.45454545    1
>    0.45535714    0.45535714    0.00000000    1
>    0.47727273    0.47727273    0.47727273    1
>    0.48214286    0.48214286    0.00000000    1
>    0.50000000    0.50000000    0.50000000    1
>    0.50892857    0.50892857    0.00000000    1
>    0.53571429    0.53571429    0.00000000    1
>    0.56250000    0.56250000    0.00000000    1
>    0.58928571    0.58928571    0.00000000    1
>    0.61607143    0.61607143    0.00000000    1
>    0.64285714    0.64285714    0.00000000    1
>    0.66964286    0.66964286    0.00000000    1
>    0.69642857    0.69642857    0.00000000    1
>    0.72321429    0.72321429    0.00000000    1
>    0.75000000    0.75000000    0.00000000    1
> --------------------------------------------------------------------------------
> 
> any help is much appreciated.
> 
> Thank you.
> 
> Best regards,
> 
> Ken
> 
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-- 
----------------------------------------------------------------------
Prof Nicola Marzari, Chair of Theory and Simulation of Materials, EPFL
Director, National Centre for Competence in Research NCCR MARVEL, SNSF
Head, Laboratory for Materials Simulations, Paul Scherrer Institut
Contact info and websites at http://theossrv1.epfl.ch/Main/Contact


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