Dear Paolo Giannozzi and other QE users, <br><br>Thanks for the information. It helps a lot. <br>I have one follow up question regarding the e-ph coupling calculation. <br><br>In the formulation I found on the attached document or the QE website, the quantity gamma or lambda is defined on the Fermi surface, so it is not a function of electron energy. <br>
<br>But in some literature, such as this one,<br><a href="http://prb.aps.org/abstract/PRB/v81/i12/e121412">http://prb.aps.org/abstract/PRB/v81/i12/e121412</a><br><br>people can calculate the scattering rate as a function of electron energy (see fig 2 or fig 4 in the paper). They claimed that they used Quantum Espresso for the calculation. <br>
<br>I am wondering how they can do that and what the formulation is for the scattering rate calculation (for electrons not exactly on the Fermi surface). <br><br>Thanks,<br>Hua<br><br><br><br><div class="gmail_quote">On Wed, Oct 12, 2011 at 11:41 AM, Paolo Giannozzi <span dir="ltr"><<a href="mailto:giannozz@democritos.it">giannozz@democritos.it</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On Tue, 2011-10-11 at 13:31 -0400, Hua Bao wrote:<br>
<br>
> However, there is very limited information about the input and output<br>
> of the related module (dynmax, q2r, and lambda, etc). It is not even<br>
> easy to understand the output format.<br>
<br>
</div>input is documented as usual in INPUT_PH.* . Output should be quite<br>
self-explanatory. Attached, a few notes on the calculated quantities.<br>
<div class="im"><br>
> I am wondering if there is any good documentation<br>
<br>
</div>there is no good documentation and there will never be any, because<br>
everybody wants documentation but nobody wants to write it.<br>
<br>
P.<br>
<font color="#888888">--<br>
Paolo Giannozzi, IOM-Democritos and University of Udine, Italy<br>
<br>
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