<div dir="ltr"><div><div><div>Dear Sai Kumar Ramadug,<br><br></div>just another idea: how wide are the deviations from linearity? on-site occupations are difficult to converge beyond the 3rd digit. Sometimes, when they are minimally affected by the perturbation, their variation can be within numerical noise.<br>
<br></div>regards,<br><br></div>Matteo<br><br><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, May 7, 2014 at 2:44 PM, Pietro Bonfa' <span dir="ltr"><<a href="mailto:pietro.bonfa@fis.unipr.it" target="_blank">pietro.bonfa@fis.unipr.it</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Sai Kumar Ramadug,<br>
<br>
I can comment only on the sentence below:<br>
<div class=""><br>
On 05/06/2014 05:47 PM, Sai Kumar Ramadugu wrote:<br>
> The problem I am having as of now is that some of the responses dn0/da<br>
> and dn/da are not linear and do not intersect at 0.<br>
<br>
</div>It happened to me as well. In my case I think that it was due to the<br>
size of my supercell (i.e. to the spurious perturbation introduced by<br>
the PBC). With a bigger supercell I obtained reasonable results.<br>
<br>
Kind regards,<br>
Pietro Bonfa'<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Pietro Bonfa' - PhD student<br>
Dipartimento di Fisica e Scienze della Terra "Macedonio Melloni"<br>
Viale delle Scienze 7A<br>
43124 Parma - Italy<br>
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