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<p>Dear Mohammed A. Abdelati,</p>
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<p>The TDDFPT package of Quantum ESPRESSO can only be used to compute absorption spectra of finite systems (molecules). Smearing cannot be used (occupations="smearing").
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<p>The absorption spectra of metallic systems can be computed in the independent-particle approximation using the epsilon.x program (see PP/src/epsilon.f90). The Yambo code is interfaced with
<span>Quantum ESPRESSO</span>, and I think (but I am not sure) it can be used to compute
<span>absorption spectra of metallic systems using advanced methods (please check the Yambo website for more details:
<a href="http://www.yambo-code.org/" class="OWAAutoLink" id="LPlnk830469" previewremoved="true">
http://www.yambo-code.org/</a>). <br>
</span></p>
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<p><span>HTH</span></p>
<p><span><br>
</span></p>
<p><span>Regards,</span></p>
<p><span>Iurii</span><br>
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<font size="3" face="'Times New Roman', Times, serif" color="808080">--<br>
Dr. Iurii Timrov<br>
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<font size="3" face="'Times New Roman', Times, serif" color="808080"><font size="3" face="'Times New Roman', Times, serif" color="808080">Swiss Federal Institute of Technology Lausanne (EPFL<font color="808080"><font face="'Times New Roman', Times, serif">)</font></font></font><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> users <users-bounces@lists.quantum-espresso.org> on behalf of Mohamed Ahmed Abd-Elati <maa@niles.edu.eg><br>
<b>Sent:</b> Wednesday, February 27, 2019 9:19:16 AM<br>
<b>To:</b> users@lists.quantum-espresso.org<br>
<b>Subject:</b> [QE-users] ABS for metal</font>
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<div>Dear all <br>
</div>
<div>I am so sorry if my question is trivial.<br>
</div>
<div>Is available in new version QE to study absorption spectroscopy (ABS) for metallic systems? Can you Please provide me by reference if available?<br>
</div>
<div>Thanks in advanced<br>
</div>
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<b>Mohammed A. Abdelati</b> <br style="line-height:1.2em">
<i>Assistant Lecturer</i></div>
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