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Dear Debnath,<br>
as of last November no vdW corrections are implemented for DFPT
phonon calculations (ph.x) yet.<br>
(<a class="moz-txt-link-freetext" href="http://qe-forge.org/pipermail/pw_forum/2014-November/105531.html">http://qe-forge.org/pipermail/pw_forum/2014-November/105531.html</a>)<br>
<br>
You could revert to the FD scripts that are shipped with the 5.1
package. (Folder FD in PHonon)<br>
<br>
Flo<br>
<br>
PS: If this information is outdated, I would be delighted to hear
otherwise :)<br>
<br>
<br>
<div class="moz-cite-prefix">Am 09.02.2015 um 21:41 schrieb Debnath
Talukdar:<br>
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<div>Dear QE users<br>
</div>
Currently I am doing phonon calculation of bilayer
germanene using espresso-5.1 phonon package. When I am
use van der waals's effect through exchange-correlation
functional(using flag:input_dft='vdW-DF') all phonon
mode have imaginary frequencies. <br>
<br>
</div>
Can anyone please let me know whether phonon with van der
Waals functional is implemented or not?<br>
<br>
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With regards<br>
</div>
Debnath Talukdar<br>
</div>
IISER Pune<br>
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