<div dir="ltr"><div>It is not clear to me what you mean by "proper implementation". Always writing everything to file is expensive. One could add an option to write electron-phonon matrix elements upon request, but I am not sure how useful it would be. Consider that reading and using those matrix elements may turn out not be simple: they are written in the basis of irreps, not of simple atomic displacements<br><br></div>Paolo<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Oct 6, 2015 at 9:49 PM, Vigil-Fowler, Derek <span dir="ltr"><<a href="mailto:Derek.Vigil-Fowler@nrel.gov" target="_blank">Derek.Vigil-Fowler@nrel.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi QE developers,<br>
My name is Derek Vigil-Fowler, a post-doc at the National Renewable Energy Laboratory (NREL) in the US and a former student in the group of Steven Louie at Berkeley.<br>
<br>
I am trying to do some validation of matrix elements output by the EPW code, so I would like to be able to write out the el-phonon matrix elements from QE. However, I would like to do so without using wannier functions. It seems one can only write out the electron-phonon matrix elements in QE if one is using wannier functions. It seems like it would be easy to write out the matrix elements when not using wannier functions at the end of elphel (write the elements of el_ph_mat). Can this option be properly implemented? Obviously, I can hack to code to do this, but I prefer a proper implementation. I think this is a feature many would like since wannier functions can take a while to generate in complex systems.<br>
<br>
Please let me know if such a development is possible.<br>
<br>
best,<br>
<br>
Derek<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><span><span><font color="#888888">Paolo Giannozzi, Dept. Chemistry&Physics&Environment,<br>
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
Phone <a href="tel:%2B39-0432-558216" value="+390432558216" target="_blank">+39-0432-558216</a>, fax <a href="tel:%2B39-0432-558222" value="+390432558222" target="_blank">+39-0432-558222</a></font></span></span></div></div></div></div>
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