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<DIV class=ReadMsgSubject>Dear all,</DIV>
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<DIV class=ExternalClass id=MsgContainer>In the calculation of core states, Wien2k treats the spin-up electron and spin-down electron respectively from their full relativistic Dirac equations. However, in such calculations the spin(S) is not good quantum number of the system, but the total angular momentum(J=l+S). Actually, in the /SRC_lcore/insld.f the spherical potential file<BR>"case.vspup" is read for solution the "spin-up" Dirac equation and "case.vspdn" for solution of "spin-dn" Driac equation. <BR> <BR>Anyone can give me some tips to understand such treatment of independent "spin-up" and "spin-down" electrons with the framework of Dirac equation? In full relativistc situation, the spin-up and spin-down states are always mixed together such that the eigen-spin states actually do not exist.<BR> <BR> <BR>Thanks so much.<BR>Wenmei Ming<BR> <BR>Institute of Physics, <BR>Chinese Academy of Sciences<BR>Beijing
100190<BR>China<BR></DIV></DIV></td></tr></table><br>
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