Dear Iurii,<div>Thanks a lot for your comments.<br /><br />18:45, 20 июля 2020 г., Timrov Iurii <iurii.timrov@epfl.ch>:<br /><blockquote class="210e7a848e8fcb45wmi-quote">
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<p style="margin-bottom:0;margin-top:0">Dear Andrey,</p>
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<p style="margin-bottom:0;margin-top:0">The transferred momentum is specified in Cartesian coordinates, in units of 2*pi/a, where 'a' is the lattice parameter (please see q-e/TDDFPT/Doc/INPUT_EELS.txt).<br />
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<p style="margin-bottom:0;margin-top:0">> How to find suitable direction for transferred momentum<br />
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<p style="margin-bottom:0;margin-top:0">You can specify q = (q1, q2, q3) in any direction you want (e.g. check the Brillouin zone for your system, and see in particular which high-symmetry direction you have). Maybe you can check the literature, pick up some specific direction for a specific material,
and try to reproduce the published result. This should give you an idea how it works.</p>
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<p style="margin-bottom:0;margin-top:0">Greetings,</p>
<p style="margin-bottom:0;margin-top:0">Iurii<br />
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<font color="808080" face="'Times New Roman', Times, serif" size="3">--<br />
Dr. Iurii Timrov<br />
Postdoctoral Researcher<br />
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<font color="808080" face="'Times New Roman', Times, serif" size="3">Swiss Federal Institute of Technology Lausanne (EPFL</font><font color="808080" face="'Times New Roman', Times, serif" size="3">)</font><font color="808080" face="'Times New Roman', Times, serif" size="3"><br />
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<a id="190ca9d06bcdffa5af2c81e9ce8c2161LPNoLP" href="http://people.epfl.ch/265334">http://people.epfl.ch/265334</a><br />
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<div id="f2e387f28ef856c18dfa722bbcbb9bfadivRplyFwdMsg" dir="ltr"><font color="#000000" face="Calibri, sans-serif" style="font-size:11pt"><b>From:</b> users <<a href="mailto:users-bounces@lists.quantum-espresso.org">users-bounces@lists.quantum-espresso.org</a>> on behalf of Andrey Chibisov <<a href="mailto:andreichibisov@yandex.ru">andreichibisov@yandex.ru</a>><br />
<b>Sent:</b> Sunday, July 19, 2020 8:50:38 AM<br />
<b>To:</b> Quantum ESPRESSO users Forum<br />
<b>Subject:</b> [QE-users] How to find suitable direction for transferred momentum qi in turbo_eels.x code</font>
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<div>Dear colleagues,</div>
<div>I try to calculate EELS spectra for graphene/hBN (two single layer).</div>
<div>How to find suitable direction for transferred momentum qi in turbo_eels.x code for this system?</div>
<div>I need to find acoustic plasmons modes</div>
<div>-- <br />
Best regards,<br />
Dr. Andrey Chibisov, Ph.D.</div>
<div>Senior Researcher,<br />
Laboratory of Numerical Methods in Mathematical Physics,<br />
Computing Center of the Russian Academy of Sciences.<br />
Khabarovsk, Russia<br />
Web page: <a href="https://www.researchgate.net/profile/A_Chibisov">https://www.researchgate.net/profile/A_Chibisov</a></div>
<div><a href="https://www.linkedin.com/in/andrey-chibisov-98625355/">https://www.linkedin.com/in/andrey-chibisov-98625355/</a></div>
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