Prof Isaev,<br><br>Thank you for your response. I am still confused, though. a2F is a function of omega only, but the a2Fq2r.* files hold matrices, in the exact format of the dynamical matrices. But these are not the dyn mats; separate files called matdyn* (* ranging from 1 to number of q-points) are created, which are the dyn mats. Another issue is that these a2Fq2r.* files are created BEFORE the q2r calculation. q2r.x actually uses these files and creates the files a2Fmatdyn.* (* ranging from 61 to 70). It seems to me like the a2Fmatdyn.* are used for matdyn.x to get a2F(omega), so the a2Fq2r.* files--and the a2Fmatdyn.* files, for that matter--couldn't possibly be the spectral function data. Am I incorrect? Thank you for your time.<br>
<br>HB<br><br><br><div class="gmail_quote">On Thu, May 27, 2010 at 4:49 PM, Eyvaz Isaev <span dir="ltr"><<a href="mailto:eyvaz_isaev@yahoo.com">eyvaz_isaev@yahoo.com</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;">
Dear Rhee,<br>
<div class="im"><br>
--- On Fri, 5/28/10, Hahnbidt Rhee <<a href="mailto:hrhee@ucdavis.edu">hrhee@ucdavis.edu</a>> wrote:<br>
<br>
> What exactly are in the files a2Fq2r.* (the suffix ranging from 51 to > 60), which are generated during an el-ph calculation? The format of<br>
> these files are like those of the dynamical matrices, but they are not > the same.<br>
<br>
</div>They are Eliashberg function (\alpha^2F(\omega)) calculated for 10 degauss (ranging from 0.005 till 0.05 by default) which are then used to evaluate lambda.<br>
<div class="im"><br>
> How are they related to the dynamical matrices?<br>
<br>
</div>Not sure they are related.<br>
<div class="im"><br>
> Why are there 10 of them, and how are these related to each other?<br>
<br>
</div>This one is due to double delta in the \gamma function which enters to the Eliashberg function. As integration of double delta is a hard problem, the summation in the BZ is performed by special points and broadening techniques. Different values for delta (10 by default) is used to find converged (w.r.t. delta) lambda.<br>
<br>
So, they are not related.<br>
<br>
Bests,<br>
Eyvaz.<br>
<br>
-------------------------------------------------------------------<br>
Prof. Eyvaz Isaev,<br>
Department of Physics, Chemistry, and Biology (IFM), Linkoping University, Sweden<br>
Theoretical Physics Department, Moscow State Institute of Steel & Alloys, Russia,<br>
<a href="mailto:isaev@ifm.liu.se">isaev@ifm.liu.se</a>, <a href="mailto:eyvaz_isaev@yahoo.com">eyvaz_isaev@yahoo.com</a><br>
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</blockquote></div><br>