Siddheshwar Chopra
sidhusai@gmail.com
Regards,
On Tue Jun 18 '13 8:02pm, Alex Granovsky wrote
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>Dear Siddheshwar,
>dielectric constant is a macroscopic property.
>At microscopic level, we can compute frequency-dependent
>polarizabilities and hyper-polarizabilities. Having a certain
>model of the macroscopic body one can relate a microscopic
>properties such as polarizability to a dielectric constant.
>Below please find a sample file with computation of
>frequency-dependent polarizability for benzene molecule
>using PBE0 density functional. In brief, this is done
>using runtyp=TDHF and specifying some DFTTYP.
>If no DFTTYP is given, then these are indeed classical
>TDHF calculations, if DFTTYP is given then they in fact
>become TDDFT computations.
>
$CONTRL SCFTYP=RHF DFTTYP=PBE0 runtyp=TDHF nosym=1 $END $SYSTEM TIMLIM=300 MEMORY=3000000 $END $BASIS GBASIS=N31 NGAUSS=6 NDFUNC=1 NPFUNC=1 $END $TDHF NFREQ=2 FREQ(1)=0,0.1 $END $DATA C6H6 Dnh 6 CARBON 6.0 -0.698164472 1.209256337 0.000000000 HYDROGEN 1.0 -1.241338149 2.150060743 0.000000000 $END
>>Regards,