<div dir="ltr"><div>Dear Zafar,<br></div>You are right.The negative frequecy is take care in QHA by Ghost_DOS.x i think.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, May 2, 2013 at 4:48 PM, zafar rasheed <span dir="ltr"><<a href="mailto:zafartariq2003@yahoo.com" target="_blank">zafartariq2003@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td style="font:inherit" valign="top">Dear Elias and Bramha Pandey<br>
<br>NaN in *.QHA.out file appears due to some negative frequency.<br>Check your frequency file created in QHA run_me process. If negative frequency is created then it mean that you have to run your phonon file with a change in <br>
tr2_ph=1.0d-10 to tr2_ph=1.0d-16 or any other negative number greater than 10.<br>Hope that by this change negative frequency will not appear and you will not get NaN message.<br><br>Muhammad Zafar<br>
PhD Scholar<br>
Department of Physics<br>
The Islamia University of Bahawalpur,Pakistan</td></tr></tbody></table><br>_______________________________________________<br>
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