The Hellmann-Feynman (not sure on the number of n's) forces are printed after the pw.x calculation is tprnfor is set to true
On Thu, 16 Feb 2012 22:59:29 +0100, Elie M <elie.moujaes at hotmail.co.uk> wrote: > > Hello all, > Just a quick question. Is there a way , when doing phonon calculations > in QE, to just extract the Hellmann Feynamnn forces exerted on the atoms > without going the whole way and compute the phonon frequencies? > Thanks > Elie MUniversity of NottinghamNG7 2RDUK -- Lorenzo Paulatto IdR @ IMPMC/UPMC CNRS & Universit? Paris 6 phone: +33 (0)1 44275 084 / skype: paulatz www: http://www.impmc.upmc.fr/~paulatto/ mail: 23-24/4?14 Bo?te courrier 115, 4 place Jussieu 75252 Paris C?dex 05
