[Pw_forum] About DFPT

[Paolo Giannozzi]

On Mar 21, 2012, at 23:35 , Caloma Trumica wrote:

> "star of q", " q star",
> I was wondering what are they referred to. Do they mean "q*"?


they mean "the set of q-vectors that are generated by applying
all symmetry operations to a given q-vector". It is a basic concept
in group theory applied to crystals.

P.
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Paolo Giannozzi, Dept of Chemistry&Physics&Environment,
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222