<div dir="ltr"><div>Thank you Lorenzo,</div><div>but matdyn.x is very useful because it gives also how much an atom contribute for each vibration (a projected vDOS). So I would like to keep this tool that will be necessary as I will introduce the lattice. I will try to modify the acoustic sum rule but, unfortunately, I don't know if this change will allow the symmetric stretching peak in the vDSOS.</div><div>Very much appreciated</div><div>Pier</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno gio 23 gen 2020 alle ore 14:21 Lorenzo Paulatto <<a href="mailto:paulatz@gmail.com">paulatz@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
On 23/01/2020 14:14, p ul wrote:<br>
> asr = 'simple'<br>
<br>
Hello, I do not think this is the correct sum rule for a molecule, <br>
asr='zero-dim' is advisable. That said, matdyn is also not the best tool <br>
to plot the vibrational modes of a molecule, you could try to use <br>
dynmat.x instead, and simply read the frequencies in the output.<br>
<br>
regards<br>
<br>
-- <br>
Lorenzo Paulatto - Paris<br>
_______________________________________________<br>
Quantum ESPRESSO is supported by MaX (<a href="http://www.max-centre.eu/quantum-espresso" rel="noreferrer" target="_blank">www.max-centre.eu/quantum-espresso</a>)<br>
users mailing list <a href="mailto:users@lists.quantum-espresso.org" target="_blank">users@lists.quantum-espresso.org</a><br>
<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" rel="noreferrer" target="_blank">https://lists.quantum-espresso.org/mailman/listinfo/users</a><br>
</blockquote></div></div>