<div class=MsoNormal dir=rtl style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=right><SPAN dir=ltr style="mso-bidi-language: FA"><FONT size=3><FONT face="Times New Roman">Dear Djerdj,</FONT></FONT></SPAN></div> <div class=MsoNormal dir=rtl style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=right><SPAN dir=ltr style="mso-bidi-language: FA"><FONT size=3><FONT face="Times New Roman">I want to inform you, for obtaining of effective U, firstly you have to find</FONT></FONT></SPAN></div> <div class=MsoNormal dir=rtl style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=right><SPAN dir=ltr style="mso-bidi-language: FA"><FONT size=3><FONT face="Times New Roman"> Experimental binding energy curve for your composition. In attention to d-state energy in this curve, you can be obtain effective U.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></FONT></SPAN></div> <div class=MsoNormal dir=rtl style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN:
left" align=right><SPAN dir=ltr style="mso-bidi-language: FA"><FONT size=3><FONT face="Times New Roman">With best wishes,<o:p></o:p></FONT></FONT></SPAN></div> <div class=MsoNormal dir=rtl style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align=right><SPAN dir=ltr style="mso-bidi-language: FA"><FONT size=3><FONT face="Times New Roman">Rahnama <SPAN style="mso-spacerun: yes"> </SPAN></FONT></FONT><o:p></o:p></SPAN></div><BR><BR><B><I>Igor Djerdj <Igor.Djerdj@mat.ethz.ch></I></B> wrote: <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"> <META content="MSHTML 6.00.6000.16481" name=GENERATOR> <STYLE></STYLE> <DIV><FONT face=Arial size=2>Dear all,</FONT></DIV> <DIV><FONT face=Arial size=2>Few months ago I submitted the post here regarding the calculation of electronic structure of VOxHy compound. I followed advices which I got here related to chooice of RMTs, RKmax, etc.. and ended with compound which shows
metallic behavior. According to DC conductivity measurement the investigated compound is semiconducting with bang gap of around 0.64 eV. Then I tried DFT calculation using LSDA+U approach, and obtained this time Fermi level just slightly below the top of valence band and the width of band gap strongly dependent of the value of U. For instance for U=0.6 eV Eg=2.1 eV, U=4 eV, Eg=0.7 eV. The question is about reliability of the applied method i.e. which value of U is recommendable for 3d electrons of V? There are also changes in DOS with the change of U.</FONT></DIV> <DIV><FONT face=Arial size=2>Regards,</FONT></DIV> <DIV><FONT face=Arial size=2>Igor</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV>_______________________________________________<BR>Wien mailing list<BR>Wien@zeus.theochem.tuwien.ac.at<BR>http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien<BR></BLOCKQUOTE><BR><p> 
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