[Pw_forum] negative phonon frequencies again :: graphene

[Lorenzo Paulatto]

Dear Martin,
which version of the code are you using?

bests

-- 
Dr. Lorenzo Paulatto
IdR @ IMPMC -- CNRS & Université Paris 6
phone: +33 (0)1 44275 084 / skype: paulatz
www:   http://www-int.impmc.upmc.fr/~paulatto/
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