[Pw_forum] ph.x

[shiva mokhavat]

Dear Paolo
thank's for your answer. it helps


On Sun, Jan 12, 2014 at 3:03 PM, Paolo Giannozzi
<paolo.giannozzi at uniud.it>wrote:

> On Sun, 2014-01-12 at 13:55 +0330, shiva mokhavat wrote:
>
> > I want to calculate phonon properties of cinnabar hexagonal structure
> > of HgTe, but when I run ph.x some of the frequencies are negative. why
> > this happen?
>
> See http://www.quantum-espresso.org/faq/phonons/ , in particular
> items 7.3 and 7.2
>
> P.
> --
> Paolo Giannozzi, Dept. Chemistry&Physics&Environment,
> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
> Phone +39-0432-558216, fax +39-0432-558222
>
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