<div dir="ltr">Okay, thank you very much for the help, I really appreciate. <br><br>On Tuesday, July 31, 2018 at 8:37:59 PM UTC-7, Lucas Lodeiro wrote:<blockquote class="gmail_quote" style="margin:0;margin-left:0.8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi Kendric, the smearing is a contraption to can converge a SCF
calculation when the HOMO and LUMO are very near in energy (or the band
gap is zero), that is the case for metals or semimetals (because in the
SCF procedure you can get some metalic states in the middle of SCF or in
some step of your DM). The smearing contribute with entropic-termic
energy, and that is a problem, it can fix the SCF but gives some problem
in energy, for that is ideal to use a little value for it, but it
cannot be too little neither, because a too little value is laki that
does not use the smearing. the best way to get the better temperature is
search (scan) from what value the energy is converged (by some criteria
ej 10E-4 Ha/atom), and then you can know too what is the minimum value
to does not have problems in the SCF calculation, you can use one or
some configurations. I use in metalics and semimetalics surfaces a value
among 0.01 to 0.001 Ha (it is the kb*T energy of smearing, it is around
1000 to 100 K)</div><div><br></div><div>i hope i help you</div><div><br></div><div>regards</div><br></div><div><br><div class="gmail_quote">2018-07-31 13:14 GMT-04:00 Kendric Roberts <span dir="ltr"><<a rel="nofollow">rober...@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi I am new to cp2k and am wondering when using smearing for cell/geometry optimization how should one choose a temperature, which gives very good scf convergence, but will give inaccurate results? Thanks for the help. <span><font color="#888888"><br><div><br></div><div>-Kendric Roberts</div></font></span></div><span><font color="#888888">
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