[Pw_forum] Relationship between pseudo-charge and wave function
giannozz at nest.sns.it
Fri Jun 13 10:06:49 CEST 2003
> I used "normal" (pw.x) code and ultrasoft PP in my calculation [...]
> However, I think it is meaningful to figure out gamma point
> wavefunction with ultrasoft PPs,too.
- you can plot |psi(r)|^2 for any wavefunction at any k-point,
using the appropriate options of program pp.x. It's a little
bit clumsy but it is already implemented.
I am not sure whether program pp.x can correctly plot
wavefunctions produced by codes using only Gamma point
(having half of the G components). I am afraid it is not working
now but it will sooner or later (any volunteers?)
- BUT: what you get is just the soft part of the wavefunction.
In the ultrasoft PP method, there is no "complete" wavefunction,
just the soft part. A "real", normalized, all-electron wavefunction,
can be obtained by applying a non-trivial procedure in the PAW
style: see for instance J. Chem. Phys. 115, 5791 (2001). Such
procedure is already implemented and it will be added to the
distribution ASAFSIW (= As Soon As Francesco Says It Works,
Francesco being the guy who wrote the code ... he reads this
mailing list ... ).
Does this answer your question?
Paolo Giannozzi e-mail: giannozz at nest.sns.it
Scuola Normale Superiore Phone: +39/050509412
Piazza dei Cavalieri 7 Fax: +39/050509417, 050563513
I-56126 Pisa, Italy Office: Lab. NEST, Via della Faggiola 19
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