Thanks Sir,<br>Its neel here but i use my friend Dev Sharma's email Id also because gmail shows all reply in one window :):)<br>thank you very much sir,<br><br>Neel,<br>University of Delhi<br><br><br><div class="gmail_quote">
On Thu, Sep 24, 2009 at 3:45 PM, Lorenzo Paulatto <span dir="ltr"><<a href="mailto:paulatto@sissa.it">paulatto@sissa.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
In data 24 settembre 2009 alle ore 12:03:02, dev sharma<br>
<<a href="mailto:decboy9@gmail.com">decboy9@gmail.com</a>> ha scritto:<br>
<div class="im"><br>
> Dear Sir,<br>
> what i was find in my output file , is that the structure is<br>
> metallic and asking for smearing and nosym see output below. I am doing<br>
> calculation on ZnO doped with N, with one Zn replaced by N. Sir any<br>
> comment or<br>
> suggestion on this as ZnO is a insulator with band gap 3.32 eV approx.<br>
> And when i am giving the smearing and set nosym=.true., the error is<br>
> removed and positions are being releaxed.<br>
<br>
</div>I'm not sure I've understood your problem correctly, but in general, if<br>
you replace an atom with another there is no guarantee that the resulting<br>
crystal will still be insulator!<br>
<br>
In particular, by replacing a Zn (12 electrons in valence) with a Nitrogen<br>
(5 electrons in valence) you will change the parity of the total number of<br>
electrons in the cell: if before you had an even number of electrons than<br>
it will become odd, i.e. if before you had an insulator than you will have<br>
a conductor. Keep in mind that you're not just replacing *one* atom,<br>
you're replacing one atom *per unit cell*.<br>
<br>
best regards<br>
<br>
P.S. I'm confused... are you Neel Sing?<br>
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</font><div><div></div><div class="h5">Lorenzo Paulatto<br>
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