[Pw_forum] matdyn.x warning message

[Paolo Giannozzi]

On Aug 20, 2009, at 21:03 , Mikiyas Tsegaye wrote:

> For examples, the acoustic modes don't go to zero at the  gamma point

you need to enforce acoustic sum rule

> and the acoustic and optical branches don't touch at the  K-point

they do. Some time ago I heard a similar claim. I verified that they
touch at K.

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