<div dir="ltr"><div><div><div><div>Dear xirainbow,<br><br></div>Thank you very much for your replay.<br><br></div>In that case.dyn1 file also it is giving same only as in the case.ph.out file.<br><br></div>Please give me more clarification.<br>
<br></div>Thanking you.<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Apr 1, 2014 at 3:15 PM, xirainbow <span dir="ltr"><<a href="mailto:nkxirainbow@gmail.com" target="_blank">nkxirainbow@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">You can find the answer at the end of *.dyn* files.<br>
<div><div class="h5"><br>
On Mon, Mar 31, 2014 at 11:10 PM, Peram sreenivasa reddy<br>
<<a href="mailto:peramsreenivas@gmail.com">peramsreenivas@gmail.com</a>> wrote:<br>
> Dear Pwscf,<br>
><br>
> In my phonon calculations i got one imaginary mode in gamma to X direction.<br>
> I want to know which mode it is? and due to which atom it is happening?<br>
><br>
> I checked the case.ph.out file. In this file it is given like below.<br>
><br>
> Mode symmetry, O_h (m-3m) point group:<br>
> omega( 1 - 3) = -16.6 [cm-1] --> T_1u G_15 G_4- I<br>
> omega( 4 - 6) = 122.3 [cm-1] --> T_1u G_15 G_4- I<br>
> omega( 7 - 9) = 145.0 [cm-1] --> T_2g G_25' G_5+ R<br>
> omega( 10 - 12) = 258.5 [cm-1] --> T_1u G_15 G_4- I<br>
><br>
> Here i am attaching the case.agr file<br>
><br>
> Here all acoustic modes are given with same frequency. How can know that<br>
> particular mode name.<br>
><br>
><br>
> My system is X2YZ type. How can i know this imaginary mode is due to which<br>
> atom. I plotted partial phonon density of states also. But all atoms are<br>
> giving same contribution in this acoustic mode region.<br>
><br>
> Thank you in advance.<br>
><br>
><br>
><br>
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<br>
--<br>
____________________________________<br>
Hui Wang<br>
School of physics, Henan University of Science and Technology, Henan, China<br>
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