Dear Sir,<br> what i was find in my output file , is that the structure is metallic and asking for smearing and nosym see output below. I am doing calculation on ZnO doped with N, with one Zn replaced by N. Sir any comment or suggestion on this as ZnO is a insulator with band gap 3.32 eV approx. And when i am giving the smearing and set nosym=.true., the error is removed and positions are being releaxed.<br>
<br><br> Program PWSCF v.4.0.2 starts ...<br> Today is 24Sep2009 at 15:13:53 <br><br> Parallel version (MPI)<br><br> Number of processors in use: 4<br> R & G space division: proc/pool = 4<br>
<br> For Norm-Conserving or Ultrasoft (Vanderbilt) Pseudopotentials or PAW<br><br> Current dimensions of program pwscf are:<br> Max number of different atomic species (ntypx) = 10<br> Max number of k-points (npk) = 40000<br>
Max angular momentum in pseudopotentials (lmaxx) = 3<br> Message from routine setup:<br> the system is metallic, specify occupations<br> Message from routine setup:<br> Dynamics, you should have no symmetries<br>
<br> <br>Thanks In Advance,<br>Neel Singh ,<br>University of Delhi,<br>India<br><br> <br><br><div class="gmail_quote">On Thu, Sep 24, 2009 at 1:41 PM, Lorenzo Paulatto <span dir="ltr"><<a href="mailto:paulatto@sissa.it">paulatto@sissa.it</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Dear Neel,<br>
I only wish to add one remark to what has been already said by Sreekar and<br>
Gabriele.<br>
<br>
> ecutwfc = 40.0<br>
<br>
you have specified ecutwfc, but not ecutrho, which will be set to<br>
4*ecutwfc=160Ry. Nevertheless, as you are using ultrasoft pseudopotential<br>
your choice is not very wise; you can probably decrease ecutwfc a bit<br>
(like 25-30%), but your definitely should increase ecutrho consistently<br>
(about 8-12 times ecutwfc).<br>
<br>
best regards.<br>
<br>
--<br>
Lorenzo Paulatto<br>
SISSA & DEMOCRITOS (Trieste)<br>
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<br>
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