<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
</head>
<body>
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
<div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr">
<p>Dear Andrey,</p>
<p><br>
</p>
<p>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/<span>INPUT_EELS.txt</span>).<br>
</p>
<p><br>
</p>
<p><span>> How to find suitable direction for transferred momentum</span><br>
</p>
<p><br>
</p>
<p>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>
<p><br>
</p>
<p>Greetings,</p>
<p>Iurii<br>
</p>
<p><br>
</p>
<div id="Signature">
<div id="divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif, "EmojiFont", "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols;">
<div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0">
<div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0">
<font size="3" face="'Times New Roman', Times, serif" color="808080">--<br>
Dr. Iurii Timrov<br>
Postdoctoral Researcher<br>
<font color="808080"><font face="'Times New Roman', Times, serif"></font></font></font></div>
<font color="808080"></font>
<div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0">
<font size="3" face="'Times New Roman', Times, serif" color="808080">STI - IMX <font color="808080">
<font face="'Times New Roman', Times, serif">- THEOS</font></font></font><font size="3" face="'Times New Roman', Times, serif" color="808080"> and NCCR - MARVEL<br>
</font></div>
<div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0">
<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>
</font></div>
<font color="808080"></font>
<div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0">
<font size="3" face="'Times New Roman', Times, serif" color="808080">CH-1015 Lausanne, Switzerland<br>
+41 21 69 34 881</font></div>
<div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0">
<a href="http://people.epfl.ch/265334" tabindex="0" id="LPNoLP">http://people.epfl.ch/265334</a><br>
</div>
</div>
</div>
</div>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<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 Andrey Chibisov <andreichibisov@yandex.ru><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>
<div> </div>
</div>
<div>
<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: https://www.researchgate.net/profile/A_Chibisov</div>
<div>https://www.linkedin.com/in/andrey-chibisov-98625355/</div>
<div> </div>
</div>
</body>
</html>