<div dir="ltr"><div><div><div>Thank you sir for your valuable reply...<br><br></div>I will try to run the simulation following your suggestions.<br><br><br></div>With regards,<br></div>Bibhas<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 22, 2018 at 6:22 PM, Dr. Thomas Brumme <span dir="ltr"><<a href="mailto:thomas.brumme@uni-leipzig.de" target="_blank">thomas.brumme@uni-leipzig.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Bibhas,<br>
<br>
reducing the mixing_beta helps with the convergence - I reduced it to 0.3 and the optimization is running for at least 5 steps... However, at a certain point this could happen again (convergence problems) due to charge "jumping" back and forth between atoms - try reducing mixing_beta even more or increase the smearing or try with more k-points...<br>
<br>
Regards<br>
<br>
Thomas<br>
<br>
Zitat von Bibhas Manna <<a href="mailto:mannabibhas@gmail.com" target="_blank">mannabibhas@gmail.com</a>>:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">
Dear Thomas,<br>
<br>
Sorry for my mistake......<br>
<br>
I am attaching my input file here. Please point out what wrong values I<br>
have taken.<br>
<br>
Thanking you.<br>
<br>
With regards,<br>
Bibhas<br>
<br>
On Wed, Feb 21, 2018 at 9:35 PM, Thomas Brumme <<a href="mailto:thomas.brumme@uni-leipzig.de" target="_blank">thomas.brumme@uni-leipzig.de</a><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
wrote:<br>
</blockquote>
<br>
</span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">
Dear Bibhas Manna,<br>
<br>
without any inputfile we can only guess what might be wrong. The cutoffs<br>
seem to be a good - at least for the start; you should always check that<br>
those<br>
are enough for your specific calculation.<br>
<br>
My guess would be: you should consider using smearing for the occupations,<br>
but without input... Why are you using the old 5.1 version?<br>
<br>
Kind regards<br>
<br>
Thomas<br>
<br>
<br>
<br>
On 21.02.2018 15:52, Bibhas Manna wrote:<br>
<br>
Dear QE users,<br>
<br>
I am using PWSCF v.5.1 for vc-relaxing a graphene sheet with platinum atom<br>
adsorbed on it. The very first SCF cycle successfully converges after 18<br>
iterations but the problem arises with the immediate next SCF cycle which<br>
is not converging even after 100 iterations.<br>
<br></span>
I am using *ecutwfc of 45 Ry* and* ecutrho of 400 Ry* for pseudo<span class=""><br>
potentials types :<br>
H.pbe-van_ak.UPF<br>
C.pbe-van_ak.UPF<br>
Pt.pbe-n-kjpaw_psl.0.1.UPF<br>
<br>
<br>
Could anyone please suggest me what may be the wrong with my code..<br>
<br>
<br>
Any help in this regard is highly appreciable.<br>
<br>
Thanks and regards.<br>
Bibhas Manna<br>
Research Scholar<br>
IIT Kharagpur, India.<br>
<br>
<br>
______________________________<wbr>_________________<br></span>
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<br>
<br>
--<br>
Dr. rer. nat. Thomas Brumme<br>
Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry<br>
Leipzig University<br>
Phillipp-Rosenthal-Strasse 31<br>
04103 Leipzig<br>
<br>
Tel: +49 (0)341 97 36456<br>
<br>
email: <a href="mailto:thomas.brumme@uni-leipzig.de" target="_blank">thomas.brumme@uni-leipzig.de</a><br>
<br>
<br>
</span></blockquote></blockquote>
<br>
<br>
<br>
</blockquote></div><br></div>