Dear Wang<div><br></div><div>you can fix the number of electrons per spin channel when using smearing by activating the keyword</div><div><a href="https://manual.cp2k.org/cp2k-7_1-branch/CP2K_INPUT/FORCE_EVAL/DFT/SCF/SMEAR.html#FIXED_MAGNETIC_MOMENT">FIXED_MAGNETIC_MOMENT</a></div><div>in the section SMEAR. </div><div>Whether for metallic systems this physically makes sense is to be demonstrated. </div><div>The states around the Fermi energy of metallic systems would anyway show fractional occupation, which prevents the S**2 computation</div><div>If your system is not metallic, do not use SMAER. </div><div>Kind regards,</div><div>Marcella</div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Tuesday, September 15, 2020 at 9:57:56 AM UTC+2 ma...@gmail.com wrote:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr"><p class="MsoNormal"><span lang="EN-US">Hi, </span></p><p class="MsoNormal"><span lang="EN-US"><br></span></p><p class="MsoNormal"><span lang="EN-US">I want to ask whether </span><span lang="EN-US" style="font-size:10pt;font-family:Verdana,sans-serif;color:rgb(51,51,51);background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">MUTIPLICITY</span> can be used with SMEAR? When I use them
together, the WARNING appears as ‘WARNING: S**2 computation does not yet treat
fractional occupied orbitals’. Can anyone give me some suggestions to deal with
it. And here are my input file and out file. </p><p class="MsoNormal"><br></p><p class="MsoNormal">Thanks very much.<span lang="EN-US"><u></u><u></u></span></p><p class="MsoNormal"><br></p><div style="color:rgba(0,0,0,0.87);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:14px">Best Regards,</div><div style="color:rgba(0,0,0,0.87);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:14px">Wang</div></div></blockquote></div>