Dear Banafshe Noori : press_conv_thr is the parameter to control the final stress. The default value for press_conv_thr is 0.5D0 Kbar, which is good enough for most condition.
On Sat, Jun 1, 2013 at 11:45 PM, Banafshe Noori <b_noori88 at yahoo.com> wrote: > Dear all > > I want to calculate phonon frequency. I did a relax for my system(carbon > nanotube) and saw that the stress (Kbar) for this system is around > (-40Kbar). How can i decrease the stress on my system, and for an acceptable > magnitude of ferquencey, how much be the stress on system.? > > _______________________________________________ > Pw_forum mailing list > Pw_forum at pwscf.org > http://pwscf.org/mailman/listinfo/pw_forum -- ____________________________________ Hui Wang School of physics, Fudan University, Shanghai, China