<div dir="ltr"><div dir="ltr">On Fri, Jun 19, 2020 at 5:00 PM Vahid Askarpour <<a href="mailto:vh261281@dal.ca">vh261281@dal.ca</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">The pressure is too large, which is why it is printed as stars.<br>
<br>
You are only relaxing the atoms not the lattice constants. Is there a reason why you are not using vc-relax?<br></blockquote><div><br></div><div>if the pressure is so large that it doesn't fit in the format, the variable-cell relax will fail with probability 1-\epsilon. Likely, the actual structure is very different from the intended one, or very wrong.</div><div><br></div><div>Paolo</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Cheers,<br>
Vahid<br>
<br>
Vahid Askarpour<br>
Department of physics and atmospheric science<br>
Dalhousie University<br>
Halifax, NS<br>
Canada<br>
<br>
> On Jun 19, 2020, at 10:52 AM, BENYAHIA NEZHA <<a href="mailto:BENYAHIA-NEZHA@hotmail.fr" target="_blank">BENYAHIA-NEZHA@hotmail.fr</a>> wrote:<br>
> <br>
> CAUTION: The Sender of this email is not from within Dalhousie.<br>
> <br>
> Dear QE users,<br>
> <br>
> i have created a supercell of GaN-ZnO and i've tried to optimise it using the input file attached below. however i receive in the output file a pressure of P=********** and the convergence has been achieved. i used PAW pseudopotential.<br>
> <br>
> I would be very grateful if somebody helps or give suggestions.<br>
> <br>
> <br>
> &CONTROL<br>
>  calculation  = "relax"<br>
>Â Â etot_conv_thr =Â 1.00000e-04<br>
>Â Â forc_conv_thr =Â 1.00000e-05<br>
>  outdir    = "./tmp/"<br>
>  prefix    = "GaN-ZnO4h"<br>
>  pseudo_dir  = "../pseudo"<br>
>  restart_mode = "from_scratch"<br>
>  tprnfor    = .TRUE.<br>
>  tstress    = .TRUE.<br>
> /<br>
> <br>
> &SYSTEM<br>
>  a      = 3.60<br>
>  c      = 40<br>
>  ecutrho   = 7.20000e+02<br>
>  ecutwfc   = 1.00000e+01<br>
>  ibrav    = 4<br>
>  nat     = 32<br>
>  ntyp    = 4<br>
>Â Â occupations = "smearing"<br>
>  smearing  = "gaussian"<br>
>  degauss   =0.02,<br>
> /<br>
> <br>
> &ELECTRONS<br>
>  conv_thr     = 1.00000e-07<br>
>  diagonalization = "david"<br>
>  mixing_beta   = 3.00000e-01<br>
> /<br>
> <br>
> &IONS<br>
>Â Â ion_dynamics = "bfgs"<br>
> /<br>
> <br>
> &CELL<br>
> /<br>
> <br>
> K_POINTS {automatic}<br>
> 4 4 1Â 0 0 0<br>
> <br>
> ATOMIC_SPECIES<br>
> Ga   69.72300 Ga.pz.UPF<br>
> NÂ Â Â 14.00680Â N.pz.UPF<br>
> Zn   65.39000 Zn.pz.UPF<br>
> OÂ Â Â 15.99940Â O.pz.UPF<br>
> <br>
> ATOMIC_POSITIONS {crystal}<br>
> Ga   0.000000  0.000000  0.000000<br>
> Ga   0.666668  0.333334  0.125000<br>
> Ga   0.333334  0.666668  0.187500<br>
> Ga   0.333334  0.666668  0.062500<br>
> NÂ Â Â Â 0.000000Â Â 0.000000Â Â 0.046875<br>
> NÂ Â Â Â 0.666668Â Â 0.333334Â Â 0.171875<br>
> NÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.234375<br>
> NÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.109375<br>
> Ga   0.000000  0.000000  0.250000<br>
> Ga   0.666668  0.333334  0.375000<br>
> Ga   0.333334  0.666668  0.437500<br>
> Ga   0.333334  0.666668  0.312500<br>
> NÂ Â Â Â 0.000000Â Â 0.000000Â Â 0.296875<br>
> NÂ Â Â Â 0.666668Â Â 0.333334Â Â 0.421875<br>
> NÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.484375<br>
> NÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.359375<br>
> Zn   0.000000  0.000000  0.500000<br>
> Zn   0.666668  0.333334  0.625000<br>
> Zn   0.333334  0.666668  0.687500<br>
> Zn   0.333334  0.666668  0.562500<br>
> OÂ Â Â Â 0.000000Â Â 0.000000Â Â 0.546875<br>
> OÂ Â Â Â 0.666668Â Â 0.333334Â Â 0.671875<br>
> OÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.734375<br>
> OÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.609375<br>
> Zn   0.000000  0.000000  0.750000<br>
> Zn   0.666668  0.333334  0.875000<br>
> Zn   0.333334  0.666668  0.937500<br>
> Zn   0.333334  0.666668  0.812500<br>
> OÂ Â Â Â 0.000000Â Â 0.000000Â Â 0.796875<br>
> OÂ Â Â Â 0.666668Â Â 0.333334Â Â 0.921875<br>
> OÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.984375<br>
> OÂ Â Â Â 0.333334Â Â 0.666668Â Â 0.859375<br>
> <br>
> <br>
> BENYAHIA NEZHA<br>
> PhD Student in Materials Science<br>
> LPMF-USTO<br>
> Algeria<br>
> <br>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div></div>