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Nitrogen atom is magnetic while the molecule is not.<br>
are you taking in consideration this fact in your calculations ?<br>
stefano<br>
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On 05/03/2011 06:54 PM, Izaak Williamson wrote:
<blockquote cite="mid:974606.12674.qm@web43416.mail.sp1.yahoo.com"
type="cite">
<pre wrap="">Dear all,
I am trying to calculate the cohesive energy of the N2 molecule using the
attached input file (relax.in) and am getting a value of -16.57 eV. I use DFT
with GGA and the pseudo-potential N.pbe-rrkjus.UPF. Other work [Fuchs et. al.,
Phys. Rev. B 65, (2002)245212] has performed similar calculations and obtained
values ~10.5 eV. They even list an experimental value of 9.76 eV. Why is my
value so much higher? Is there anything in my input file that could be giving
inaccurate results? Is it my pseudo-potential that is causing this problem?
Thanks for any help.
</pre>
<pre wrap="">
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