<div dir="auto"><div dir="auto"><br></div><div dir="auto"><br></div><div>Sir I just want to know whether,what I have got , is right or not <div dir="auto">Because in Ey , it is quite different .</div><div dir="auto"><br></div><div dir="auto"><br></div><br><div class="gmail_extra"><br><div class="gmail_quote">On 5 Apr 2017 5:57 p.m., "Lorenzo Paulatto" <<a href="mailto:lorenzo.paulatto@impmc.upmc.fr">lorenzo.paulatto@impmc.upmc.fr</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="quoted-text">On Wednesday, 5 April 2017 12:45:05 CEST VineetKumar Pandey wrote:<br>
> in the output file of ph.x executable, there is given effective charges<br>
> calculated by different methods (1. through force per unit electric field,<br>
> 2. through polarisation per unit cell ). and both are different. which one<br>
> is reasonably good?<br>
<br>
</div>One is as good as the other, if you need more precision you have to increase<br>
the convergence parameters, more likely the k-points and the cutoff.<br>
<br>
kind regards<br>
<font color="#888888"><br>
<br>
--<br>
Dr. Lorenzo Paulatto<br>
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