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DOS between two energy levels

Posted: Tue Jul 28, 2015 2:45 am
by karthik1124
Hi,

I am doing a high accuracy DOS calculation between two energy levels of interest. Please find my INCAR file below.

SYSTEM = Ge
PREC = accurate
ENCUT = 500
LREAL = .FALSE.
ISMEAR = 1
EDIFF = 1e-6
NBANDS = 32
NCORE = 8
KPAR = 8
NSW= 0
LCHARG = .TRUE.
IBRION = -1
LORBIT =11
ICHARG = 11
EMIN = -3.0
EMAX = 3.0
NEDOS = 1000

However, the energy levels between which the DOS are calculated and observed in p4V are different. Is there any issue to the INCAR file/

Thanks

Re: DOS between two energy levels

Posted: Thu Jul 30, 2015 11:09 pm
by Neutrino
Hi karthik,

Make sure that EMIN and EMAX bracket the energy range of interest. In particular, EMIN and EMAX in INCAR are based on the arbitrary energy scale used to calculate the long range Coulomb interactions. To see where the edge of the valence band in this scale grep Fermi from OUTCAR. Usually one does not know this a priori, so you may first try to do DOS calculation without specifying EMIN and EMAX to see exactly where the range of interest lie on this arbitrary energy scale.


Mostafa