[Wien] Gap calculated with GGA+U, mBJ and HF

2017-08-06 Thread Wien2k User
Dear Wien2k users; I calculated the gap of a material whose experimental value is unknown. With GGA+U, mBJ potential and GW, I found that this material is semimetal (a slight band overlap) but with HF i found it to be semiconductor of very small gap. How can I know what is the real nature of

Re: [Wien] Questions about Na2IrO3 (PBE+SOC+U calculation with magnetic order)

2017-08-06 Thread Hung Yu Yang
Hi, For your doubts with regard to (3), my responses are as follow: The Ir moments are read from case.scf file, but why should it be near an integer, and what is the unit of the reported moments in case.scf file? If the unit is bohr magneton, then for a spin 1/2, should it be ~1.7? The gap can

Re: [Wien] Questions about Na2IrO3 (PBE+SOC+U calculation with magnetic order)

2017-08-06 Thread pieper
A few thoughts on this: ad 1) Presumably Ir is the magnetic ion, so what you describe seems to be ok with me. I did not check your .struct file, however. ad 2) See chapters 4.5.6 and 7.4 of the UG (Wien2k 17.1) on ther orb-program, and the references therein. Personally I found the .pdf file