Dear Espresso users I have performed a phonon calculation of an oxides on 2x2x2 q grid. I am using pw.x , ph.x; q2r.x, matdyn.x and lambda.x to calculate the phonon-electron coupling . However I am getting" NAN" in the file lambda.dat and negative frequencies in the electron-phonon.out i can't explain why i get negatives frequencies Kindly suggest me the possible ways where I can solve this. cordially
-- H.ZAARI PhD Student in laboratory of magnetism and physics of high energy Faculty of Sciences in Rabat - Morocco Email: * halimazaari at gmail.com <boujnah.mourad at gmail.com>* -------------- next part -------------- An HTML attachment was scrubbed... URL: http://pwscf.org/pipermail/pw_forum/attachments/20140508/b50c4443/attachment.html
