I do not find much sense in the data you sent ???
When you want to calculate the O2 binding energies, the RMTs and RKmax
values of O and O2 need to be IDENTICAL. And yes, break a bit the
symmetry (use slightly different a,b,c) to get the lowest energy for
atoms according to Hunds rule.
Because for cohesive energies you need the ground state energies of the
atoms/molecules involved.
And the ground state of O2 has 2 unpaired electrons, i.e. it requeres a
spin polarized calculation.
Test it yourself: Do a spin and non-spinpolarized calculationfor O2 (in
2 directories) with
Dear Prof. Peter,
Thanks a lot for the explanation. I have another question in this regard.
Please why do we have to do spin-polarized calculation for O2 (or for
non-closed shell elements) as mentioned in the FAQ page under Calculations of
cohesive or formation energies?
Thanks very much for
Dear Sir,
I am thankful for the confirmation of the state of O2 molecule.
I am tried to reproduce some results for oxygen deficient system but I see from
my data that my system is not stable.
I started from the given lattice parameters, exact functionals,(GGA, as
suggested in the paper) rmt
Remove the RLOs from As. There are no semicore As-p states.
--
P.Blaha
--
Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
Phone: +43-1-58801-165300 FAX:
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