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<P class="MsoNormal"><SPAN lang="EN-US" style="mso-ansi-language:EN-US">Dear all,</SPAN></P>
<P class="MsoNormal"><SPAN lang="EN-US" style="mso-ansi-language:EN-US">I have made
TDOS calculations for rutile-TiO2 with oxygen vacancy in the center of the
supercell with 96 atoms. I have used LSDA+U and LDA+U approaches. Non spin-polarized
calculations showed enlargement of the energy gap with slight shift of defect
level. Spin-polarized calculations didn’t give changes in the value of Eg,
however defect level appreciably went down. Experimental value of the gap is 3
eV, defect level is 2 eV above valence band top.</SPAN></P>
<P class="MsoNormal"><SPAN lang="EN-US" style="mso-ansi-language:EN-US">So, I have
a question: which of these two approaches give me true result?</SPAN></P>
<P class="MsoNormal"><SPAN lang="EN-US" style="mso-ansi-language:EN-US"><o:p> </o:p></SPAN></P>
<P class="MsoNormal"><SPAN lang="EN-US" style="mso-ansi-language:EN-US">Thanks in
advance,</SPAN></P>
<P class="MsoNormal"><SPAN lang="EN-US" style="mso-ansi-language:EN-US">Maxim</SPAN></P></td></tr></table><br>
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