Thank you! My QE version is 4.0.4. I will go for the newest version to have a look.<br><br><div class="gmail_quote">On Tue, Apr 21, 2009 at 10:21 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 21 aprile 2009 alle ore 15:55:29, Aihua Zhang <<a href="mailto:zah7903@gmail.com">zah7903@gmail.com</a>><br>
ha scritto:<br>
<div class="im">> I had expected the force exerted on nucleus by the field would<br>
> cancel the force on ion due to change in electron charge density, so the<br>
> total force should vanish since the system is neutral. I also varied the<br>
> cutoff energy, but failed to see a convergence behavior as shown below.<br>
> Could anyone give me a clue? Thank you!<br>
<br>
</div>dear Aihua Zhang,<br>
that part of the code has been "fixed" more than once recently, hence the<br>
answer depends on the exact version of QE you are using.<br>
<br>
regards<br>
<font color="#888888"><br>
<br>
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