Optical properties

Queries about input and output files, running specific calculations, etc.


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lsam
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Optical properties

#1 Post by lsam » Thu Sep 27, 2007 3:48 pm

Hello,

I want to get the optics matrix elements, so added the lines

LOPTICS = .TRUE.
NPAR = 1
in my INCAR file, but nothing happens. I was expecting a new file, but I didn't found any new file.

Anyone knows what's happen?

Regards
Last edited by lsam on Thu Sep 27, 2007 3:48 pm, edited 1 time in total.

admin
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Optical properties

#2 Post by admin » Fri Sep 28, 2007 8:57 am

the data should be written on file 'OPTIC'
please check whether you have used PAW potentials ?(if not, LOPTICS is reset to .false.)
Last edited by admin on Fri Sep 28, 2007 8:57 am, edited 1 time in total.

irene
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Optical properties

#3 Post by irene » Fri Sep 28, 2007 9:01 am

1) First, you have to run a SCF calculation (with ICHARG 1) to get an initial CHGCAR.

2) Then perform a non-selfconsistent calculation (changing ICHARG to 11 to read the prevously calculated CHGCAR) with LOPTICS=.TRUE. and NPAR=1
Last edited by irene on Fri Sep 28, 2007 9:01 am, edited 1 time in total.

lsam
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Optical properties

#4 Post by lsam » Fri Sep 28, 2007 9:16 am

Ok, I was using US potentials.

Thanks for your help.
Last edited by lsam on Fri Sep 28, 2007 9:16 am, edited 1 time in total.

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