<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt">Hi,<br><br>Well, what is the problem? Is it for a known system? Why do you think they should cross? <br>Anyway, go to PlotPhon in QE (4.2) and try it. <br><br>Bests,<br>Eyvaz<br>-------------------------------------------------------------------<br>Prof. Eyvaz Isaev, <br>Department of Physics, Chemistry, and Biology (IFM), Linkoping University, Sweden <br>Theoretical Physics Department, Moscow State Institute of Steel & Alloys, Russia, <br>isaev@ifm.liu.se, eyvaz_isaev@yahoo.com<div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: arial,helvetica,sans-serif; font-size: 13px;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> mayank gupta
<mayankaditya@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> pw_forum@pwscf.org<br><b><span style="font-weight: bold;">Sent:</span></b> Fri, August 27, 2010 10:53:04 AM<br><b><span style="font-weight: bold;">Subject:</span></b> [Pw_forum] crossing of phonon branches<br></font><br>
Hi<br>In the phonon calculation the after matdyn.x run, we got the phonon<br>frequency but they are not in correct order, I mean at different q<br>point the phonon branches are crossing each other.<br><br>Mayank BHU(INDIA)<br>_______________________________________________<br>Pw_forum mailing list<br><a ymailto="mailto:Pw_forum@pwscf.org" href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br><span><a target="_blank" href="http://www.democritos.it/mailman/listinfo/pw_forum">http://www.democritos.it/mailman/listinfo/pw_forum</a></span><br></div></div>
</div><br>
</body></html>