Dear Luis<br><br>If I am correct , I feel that the non-orthonormality of atomic states on different atoms may affect the projected properties like PDOS.<br><br><div><i><font color="#000066" face="comic sans ms,sans-serif"></font></i> </div>
<div> <span style="font-family: comic sans ms,sans-serif;">Best Wishes</span><br></div>
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<p style="margin: 0in 0in 0pt; line-height: normal;"><font size="2"><i><span style="color: rgb(0, 0, 102); font-family: 'Comic Sans MS';">Masoud Nahali <span> </span></span></i><span style="font-family: 'Times New Roman','serif';"></span></font></p>
<p style="margin: 0in 0in 0pt; line-height: normal;"><i><font color="#000000"><font size="2"><span style="line-height: 115%; font-family: 'Times New Roman','serif';">PhD Student of Physical Chemistry<br>Sharif University of Technology</span></font><span style="font-size: 6pt; line-height: 115%; font-family: 'Times New Roman','serif';"> </span></font></i></p>
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<br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<br>
Stefano de Gironcoli :<br>
<br>
<br>
the integral of the dos on the energy axis (from -infty to +infty) is<br>
the total number of states in your system ... (the number of plane waves<br>
in your basis) .... can you figure out why ?<br>
the integral of the total pdos over the same interval is the total<br>
number of atomic wavefunctions over which one is projecting ... again,<br>
can you figure out why ?<br>
As NPW >> NATOMWFC no surprise they differ in some portion of the energy<br>
axis.<br>
Since approximations like LCAO are usually reasonable the occupied<br>
portion of the energy axis is usually well described but sooner or<br>
later the pdos must drop to zero while the dos likely goes on for a<br>
while (forever for infinite cutoff).<br>
<br>
hope this helps<br>
stefano<br>
<br>
Luis wrote:<br></blockquote><div> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
> Dear QE users,<br>
><br>
> I have performed a DOS calculation of a metal oxide system with some<br>
> adsorbates.<br>
> Then I plot the total DOS using the file myfile.pdos_tot, and I also plot<br>
> the sum of the PDOS generated by the program sumpdos.x included in the<br>
> Quantum Espresso package.<br>
> In principle both plots should give the same, but what I see is that the DOS<br>
> plots for the zone of the unoccupied bands do not overlap. In particular,<br>
> the DOS area generated with the sumpdos.x program is considerably smaller.<br>
> I can't understand why do I encounter this difference. Is there a reason for<br>
> that?<br>
><br>
> Thank you<br>
><br>
><br>
<br>
<br>
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