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Re: [abinit-forum] Distinguish between T1u and T2u in O_h


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  • From: "matthieu verstraete" <matthieu.jean.verstraete@gmail.com>
  • To: forum@abinit.org
  • Subject: Re: [abinit-forum] Distinguish between T1u and T2u in O_h
  • Date: Wed, 7 Jan 2009 01:15:56 +0100
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the characters are in the same order as the symrel (so include some repetitions if there are several 2-axes, for instance). And the symrel are identified at the beginning of a ground state run, at least in the log file. In this case I can't guarantee they are in the same order as the final symrel, but at least you have the operations. From the symrel anyway you should be able to recognize them.

Matthieu

On Tue, Jan 6, 2009 at 8:23 PM, PGanesh <pganesh@ciw.edu> wrote:
Hi,

I am looking at symmetries of phonons at gamma. Since T1u (gamma15) and T2u (gamma25) modes in O_h have the same number of  different terms in the character table (same number of '0s' and '1's' etc.) how do I distinguish between them? Is there any way I can write out to what symmetry operation the particular character belongs to ?

Thanks,
Ganesh



--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr. Matthieu Verstraete

European Theoretical Spectroscopy Facility (ETSF) 
Dpto. Fisica de Materiales, 
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Mail : matthieu.jean.verstraete@gmail.com
http://www-users.york.ac.uk/~mjv500



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