Dear Paolo,<br>Thanks for your advice. The wild pressure oscillations dissapear using a smaller value of con_thr. <br><br clear="all">>it looks like a nonlinear interaction between symmetry and insufficient<br>
>convergence of self-consistency. If you reduce the convergence >threshold<br>
>to conv_thr=1.0e-8 or so (default is 10e-6) the jumps disappear; same if<br>
>you use all symmetries, whether their fractional translation is<br>
>commensurate or not with the FFT grid (option use_all_frac). I guess<br>
>that the discrepancy wrt previous versions has a similar origin.<br>
<br>
>The default value for the convergence threshold is good if you are<br>
>interested in energies, reasonable if you are interested in forces,<br>
>not so good for stress and pressure<br><br>Best regards<br>-- <br>
<div>Eduardo Menendez Proupin</div><div>Departamento de Fisica, Facultad de Ciencias, Universidad de Chile <br>URL: <a href="http://fisica.ciencias.uchile.cl/%7Eemenendez" target="_blank">http://fisica.ciencias.uchile.cl/~emenendez</a><div>
<span style="font-family:sans-serif;font-size:13px;line-height:19px"><font><span style="font-family:sans-serif;line-height:19px"><i><span style="font-family:"Arial","sans-serif"">"Lograremos el anhelado desarrollo cuando sea la ciudadanía, y no los científicos,
la que pida más ciencia para Chile." J. Babul</span></i></span></font><br></span></div></div>