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Without the list of irreducible elements of the Raman and non-linear optical susceptibility tensor

From: "lan haiping" <lanhaiping@gmail.com>
To: forum@abinit.org
Subject: Without the list of irreducible elements of the Raman and non-linear optical susceptibility tensor
Date: Wed, 5 Mar 2008 04:06:28 +0800
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Dear All,

I performed a non-linear response calculation on TiO2 system wishing to obtain its Raman intensity.
The calculation process was according to non linear response tutorial presented in tests directory.
All settings for response calculation are almost same with the nonlinear response tutorial example, except rfatpol and rf1atpol,
which was set to
rfatpol4 1 6
rf1atpol5 1 6
,since the number of atoms present in TiO2 system is 6.

The calculation was finished smoothly, and with some comments and warnings in the output file.
But when i checked the xxx_DS5_DDB file, I just found no matrix element was given for 3rd order derivative. And i found the list of irreducible elements of the raman and non-linear optical susceptibility tensor
is empty .

Would you please do some comments on this strange behavior ?
I really appreciate your reply and favor!

Best Regards,
Hai-Ping

--
Hai-Ping Lan
Department of Electronics ,
Peking University , Bejing, 100871
lanhaiping@gmail.com, hplan@pku.edu.cn

Without the list of irreducible elements of the Raman and non-linear optical susceptibility tensor, lan haiping, 03/04/2008