[Wien] different eigenvalues at the same k point
Yongbin Lee
yblee at iastate.edu
Wed Aug 27 17:20:37 CEST 2008
Hi,
You should add 'orb' in your band calculation.
So it had to be 'x lapw1 -band -up -orb -p' not 'x lapw1 -band -up -p'
Yongbin
> Dear users,
> I got the different eigenvalues at (0,0,0) from case.klist and
case.klist_band. I think this
> is unreasonable, maybe I have something wrong with my process.
> I am doing GGA+U calculations for pure ZnO, U(Znd)=7.5eV
> runsp_lapw -p -orb -cc 0.001 -ec 0.0001,
> After that I got the eigenvalues at (0,0,0) for up spin are
> K= 0.00000 0.00000 0.00000 1
> :RKM : MATRIX SIZE 371LOs: 34 RKM= 6.98 WEIGHT= 1.00 PGR:
> EIGENVALUES ARE:
> -5.3728632 -5.3726646 -5.3720193 -5.3720193 -5.3720013
> -5.3720013 -1.0604865 -1.0117592 -0.3038482 -0.3038479
> -0.3021278 -0.2924885 -0.2924884 -0.2485623 -0.2485622
> -0.2355277 -0.2355277 -0.2295515 -0.1254418 0.1735083
> 0.1735085 0.2235002 0.2259273 0.2259274 0.3317865
> 0.6572532 0.8743296 1.2174851 1.2174853 1.3120212
> 1.3126602 1.3126614 1.4813955 1.6015259 1.6015262
> 1.7272975 1.7272977 1.7333897 1.8434873 1.9786480
> ********************************************************
> :FER : F E R M I - ENERGY(TETRAH.M.)= 0.22593
>
> Then I calculated the band structure
> 'x lapw1 -band -up -p'
> I found the eigenvalues in case.output1up are
> K= 0.00000 0.00000 0.00000 GAMMA
> MATRIX SIZE 371 WEIGHT= 2.00 PGR:
> EIGENVALUES ARE:
> -5.3728631 -5.3726644 -5.3720192 -5.3720192 -5.3720012
> -5.3720012 -1.0604835 -1.0064367 -0.1393203 -0.1148119
> -0.1148116 -0.1086308 -0.1007132 -0.1007131 -0.0109564
> -0.0109563 0.0066803 0.0066803 0.0235110 0.2286371
> 0.2286373 0.2787604 0.2875916 0.2875918 0.3318913
> 0.6578704 0.8795310 1.2226986 1.2226988 1.3120498
> 1.3149472 1.3149484 1.4930243 1.6279692 1.6279695
> 1.7430521 1.7449112 1.7449114 1.8470804 1.9802465
> 0 EIGENVALUES BELOW THE ENERGY -10.00000
> ********************************************************
> So if I enter the fermi energy 0.22593 in ZnO.insp, I will get the metalic
band structure.
> But according to the ZnO.scf and DOS(do not need recalculate lapw1) it is
semiconductor,
> and in fact it should be semiconduter.
> What's wrong with my calculation? Have you found some strange? Any suggestions
will
> be appreciated.
> yours sincerely,
> hongxia
>
>
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