<p dir="ltr">Dear Eduardo, <br>
The frequency are the square roots of the eigenvalues of the dynamical matrix, it is not possible to compute just a few eigenvalues without having the whole matrix.</p>
<p dir="ltr">Kind regards</p>
<p dir="ltr">▼ Hide quoted text</p>
<div class="gmail_quote">On 22 Dec 2015 6:55 pm, "Eduardo Menendez" <<a href="mailto:eariel99@gmail.com">eariel99@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi, <br>I have one doubt about the PHONON code. Is it possible to compute just a few phonon frequencies using the PHONON keywords last_irr, ldiag ? For example, using <br> <br>last_irr = 10,<br> ldiag=.true.,,<br><br></div>may one find the frequencies of just the first irreducible representations ?<br><div><br></div><div>Thank you, <br><br clear="all"></div><div><div><div><div dir="ltr"><div><div dir="ltr">
<div>Eduardo Menendez Proupin<br>Departamento de Fisica, Facultad de Ciencias, Universidad de Chile <br>URL: <a href="http://www.gnm.cl/emenendez" target="_blank">http://www.gnm.cl/emenendez</a></div><div><br></div><div>
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