This question has been answered many times: www.quantum-espresso.org/faq/phonons
Paolo On Mon, Nov 13, 2017 at 9:18 AM, 方子明 <[email protected]> wrote: > Dear Experts, > Recently, I have done some phonon calculations about NaFeAs, I noted that > some negative frequencies appears at Gamma point. > I have also done calculationphonon dispersion for LiFeAs, and again I > found some negative frequencies. > My input files are attached with mail. > Thanking in anticipation for answering my question. > Regards, > Ziming Fang. > > > > > > > _______________________________________________ > Pw_forum mailing list > [email protected] > http://pwscf.org/mailman/listinfo/pw_forum > -- Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche, Univ. Udine, via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222
_______________________________________________ Pw_forum mailing list [email protected] http://pwscf.org/mailman/listinfo/pw_forum
