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k-points / irreducible BZ


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  • From: blazej@phys.upb.de
  • To: forum@abinit.org
  • Subject: k-points / irreducible BZ
  • Date: Fri, 15 Apr 2005 13:34:15 +0200

Dear abinit-Users,

I would like to know the resulting density of the k-point mesh in reciprocal
space in my calculation.

The problem I have is the following:
I use:
kptopt 1
ngkpt 1 1 1
to generate my k-points. As far as I understood from the ngkpt description,
this means that a single k-point is generated, however, in the irreducible BZ
(Is this correct?). Inside the output file I can only find the size of the
first BZ, but there are symmetry operations allowing to reduce to a smaller
irr. BZ.
In order to calculate the k-point density (kpden), one needs therefore the
size of the irr. BZ (irrBZ):
kpden = nkpt/irrBZ
where the number of generated k-points (nkpt) is 1 in my case.

Is there an easy way to find out the size of the irreducible BZ or is there
maybe another possibility to get the k-point density?

Thanx a lot in advance,
Blazej


  • k-points / irreducible BZ, blazej, 04/15/2005

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