<div dir="ltr"><br>Dear Elham<div><br></div><div>for a configuration Co(2+) low spin, it is enough to remove the 4s, Why are you adding the 3d?</div><div>Anyway, these settings are just to guide the initial distribution of the orbitals' occupation. </div><div>The density matrix is always rescaled in order to ensure the correct (integer) number of electrons per each spin channel, before the actual electronic structure calculation is started. </div><div>Best regards</div><div>Marcella</div><div><br></div><div><br>On Friday, December 13, 2019 at 4:27:03 PM UTC+1, jiapeng Liu wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">
<div>
<p>May I ask what is the meaning to have half electrons with alpha
spin? According to my understanding, in the BS section, the real
electrons with alpha spin is calculated as (7+4)/2=5.5 where 7 is
the outer electron numbers of Co? And the electron with beta spin
is (7+1)/2=4? Am I correct? I do not understand how the 5.5
electrons go? Thank you very much.<br>
</p>
<div>On 6/12/2019 9:35 pm, Elham M.Goliaei
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Dear all,
<div><br>
</div>
<div> I have done geometry optimization using cp2k, I started
by low spin configuration for Co(2+). According to below, my
DFT section includes:</div>
<div> </div>
<div> &DFT</div>
<div> LSD</div>
<div> MULTIPLICITY 2</div>
<div> RELAX_MULTIPLICITY 0.01</div>
<div> ....</div>
<div>and I have just defined BS section for Co atom as below:</div>
<div><br>
</div>
<div> &BS</div>
<div> &ALPHA</div>
<div> NEL +4 -2</div>
<div> L 2 0</div>
<div> N 3 4</div>
<div> &END ALPHA</div>
<div> &BETA </div>
<div> NEL +1 -2</div>
<div> L 2 0</div>
<div> N 3 4</div>
<div> &END BETA </div>
<div> &END BS</div>
<div><br>
</div>
<div> I noticed these values in the output:</div>
<div><br>
</div>
<div>
<div>Integrated absolute spin density :
2.7865063578</div>
<div>Ideal and single determinant S**2 :
0.750000 1.647620</div>
</div>
<div><br>
</div>
<div>Can I have some explanation regarding <span style="background-color:rgb(255,255,255)"><b>"Ideal and
single determinant S**2" </b>values?</span></div>
<div><span style="background-color:rgb(255,255,255)"><br>
</span></div>
<div><span style="background-color:rgb(255,255,255)">Best
regards,</span></div>
<div><span style="background-color:rgb(255,255,255)">Elham</span></div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
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