<div dir="ltr">Dear Hana,<div><br></div><div>I may misunderstand your question, but I think if you use Wannier function, you have the Wannier center for electrons (molecular orbitals); however, if you use voronoi method, you dont have the charge center for electrons, the charge density for voronoi is the summation contribution from all molecular orbitals (the square of molecular orbitals is the probability density for electrons). </div><div><br></div><div>Best regards,</div><div><br></div><div>Fangyong</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jan 13, 2024 at 5:00 PM Fangyong Yan <<a href="mailto:fangyongyan2023@gmail.com">fangyongyan2023@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear Hana,<div><br></div><div>Dipole moment for a neutral molecule or molecular system including ionic liquids with the total charge = 0, is invariant from your choice of coordinate systems (you shift your original coordinate center from (0,0,0) to (a,b,x)), the dipole moment does not change.</div><div>However, this does not apply to charge species. So if you calculate the dipole moment of an Emim cation, it does not have strict physical meaning because once you change your center to a new center, the dipole moment changes. However, if you put a cation and an anion together, then the dipole moment is meaningful. </div><div>On the other hand, the time derivative of dipole moment, is also invariant to the choice of coordinate system. </div><div><br></div><div>Best regards,</div><div><br></div><div>Fangyong</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jan 11, 2024 at 7:56 AM Hana <<a href="mailto:holiaei2@illinois.edu" target="_blank">holiaei2@illinois.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear CP2K community,<div><br></div><div>I have used the voronoi integration feature of CP2K to dump information related to charge centers and dipole moments. In the *.voronoi file I notice that there are "Position", "Charge", "ChargeCenter" and "Dipole" columns. For a specific atom, I want to compare the "Dipole" value with the "Charge" * ("Position"+"ChargeCenter") value. However, they turn out to be quite different. Does anyone have a suggestion on this?</div><div><br></div><div>Thanks!</div>
<p></p>
-- <br>
You received this message because you are subscribed to the Google Groups "cp2k" group.<br>
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp2k+unsubscribe@googlegroups.com" target="_blank">cp2k+unsubscribe@googlegroups.com</a>.<br>
To view this discussion on the web visit <a href="https://groups.google.com/d/msgid/cp2k/7d59bf55-391b-4a18-9a04-ee3d0f08f1can%40googlegroups.com?utm_medium=email&utm_source=footer" target="_blank">https://groups.google.com/d/msgid/cp2k/7d59bf55-391b-4a18-9a04-ee3d0f08f1can%40googlegroups.com</a>.<br>
</blockquote></div>
</blockquote></div>
<p></p>
-- <br />
You received this message because you are subscribed to the Google Groups "cp2k" group.<br />
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp2k+unsubscribe@googlegroups.com">cp2k+unsubscribe@googlegroups.com</a>.<br />
To view this discussion on the web visit <a href="https://groups.google.com/d/msgid/cp2k/CA%2BV2FfBmYJ-_ZKRTkNB_LXrzq_w2N_CHZvjJ8AKZ21Bgfsp6iw%40mail.gmail.com?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/cp2k/CA%2BV2FfBmYJ-_ZKRTkNB_LXrzq_w2N_CHZvjJ8AKZ21Bgfsp6iw%40mail.gmail.com</a>.<br />