<DIV><FONT size=3>Dear Dr. Stefaan:</FONT></DIV>
<DIV><FONT size=3> First, thank you very much for your helpful and enlightened reply, and your reply this time is very useful to me.</FONT></DIV>
<DIV><FONT size=3> I think there was a misunderstanding about my first question:</FONT></DIV>
<DIV><FONT size=3>case.scfdmup<BR> *************************************************************<BR> Spin-polarized + s-o calculation, M|| 0.000 0.000 1.000<BR> Calculation of <X>, X=c*Xr(r)*Xls(l,s)<BR> Xr(r) = I<BR> Xls(l,s) = L(dzeta)<BR> c= 1.00000<BR> atom L up dn total<BR> :XOP 1 3 0.00332 1.25294 1.25626<BR> *************************************************************</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3> (1)My question is that<FONT color=#ff0066><STRONG> why</STRONG></FONT> the direction of orbital moment<FONT color=#ff0066><STRONG> is oppsite to</STRONG></FONT> the spin moment ? (spin moment is up, orbital moment is down, and I know the third rules of Hund's rules)</FONT></DIV>
<P><FONT size=3></FONT> </P>
<P><FONT size=3> (2)Is setting or changing the occupational numbers of electrons in case.dmatdn reasonable ? ( I mean we are try to simulate the microscopic behavior by First principles, we should not change or set any parameters in order to get the result we want.) I don't know why my understanding is right or not ,please correct it if I am wrong, thank you.</FONT></P>
<P><FONT size=3></FONT> </P>
<P><FONT size=3> (3)I checked the DOS by GGA or GGA+SO, the f_up states are always localized with or without plus U. So my understanding is that plus U can only redistribute the electrons of f_dn states, or localize the f_dn states electrons ? Am I right ?</FONT></P>
<P><FONT size=3> </FONT></P>
<P><FONT size=3> (4)I have read a book "Condensed Matter Physics" before, it said spin_orbit spliting energy is about 300 meV, so what the effect of SO on DOS ? </FONT></P>
<P><FONT size=3> </FONT></P>
<P><FONT size=3> Thank you very much, Stefaan. (Anyway, I will try to change the dmatup files and recalculate again first)</FONT></P>
<P><FONT size=3> Cheers.</FONT></P>
<P><FONT size=3></FONT> </P>
<P><FONT size=3>Your sincerely:</FONT></P>
<P><FONT size=3>Hui Wang</P>
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