[Wien] semicore band ranges too large error: for MoSi2N4

Peter Blaha peter.blaha at tuwien.ac.at
Tue Nov 14 10:26:50 CET 2023


I used exactly the struct file you sent (with your RMTs, even if I would 
not choose them this way).

init -prec 1n
run_lapw
save rkm6
edit case.in1 to change RKmax
run_lapw

no problems.

I do not understand, how you can get your error:  (SELECT E-top/bottom 
not found) when you just change RKMAX. RKmax has nothing to do with 
finding E-parameters.

Does it happen immediately after increasing RKmax ? or after a few 
iterations. How is :DIS in this case ?

Am 14.11.2023 um 10:17 schrieb hajar.nejatipoor--- via Wien:
> Yes, I use WIEN2k_23.2
> Let me know how are rmt of atoms in structure file which you used.
> 
> Sent from Yahoo Mail on Android 
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> 
>     On Tue, Nov 14, 2023 at 11:31, Peter Blaha
>     <peter.blaha at tuwien.ac.at> wrote:
>     As I wrote before: I cannot reproduce this. For me it converges fine
>     even with RKmax=7. No errors. Thus, I don't know how to help you.
> 
>     Are you using WIEN2k_23.2 ??
> 
> 
>     Am 13.11.2023 um 15:39 schrieb hajar.nejatipoor--- via Wien:
>      > Dear Dr. Blaha
>      > I act as you said, but the problem "LAPW2' - semicore band-ranges
>     too
>      > large, ghostbands" exists again!!
>      > LO for N-2s orbitals in case.in1c were removed, but it worked
>     just for
>      > rkm=6 (with or without LO for N).
>      > I tried your way with changing rmt of atoms but the problem remained.
>      >
>      > I tried a normal scf with RKm=7, from the beginning, at a different
>      > directory, but nothing was changed. Just, crashing LAPW2 is
>     postponed in
>      > some more cycles.
>      > On Sunday, November 12, 2023 at 08:42:25 PM GMT+3:30, Peter Blaha
>      > <peter.blaha at tuwien.ac.at <mailto:peter.blaha at tuwien.ac.at>> wrote:
>      >
>      >
>      > I tried your struct file, converged with RKM=6, saved, increased
>     RKMax
>      > to 7 and continued with run_lapw.
>      > No problem. As expected with your RMTs rather small change from 6
>     to 7
>      > and quick convergence.
>      >
>      > You must have changed something else, like mixing a density with
>      > different RMTs, .... ????
>      >
>      >
>      > Am 12.11.2023 um 07:30 schrieb hajar.nejatipoor--- via Wien:
>      >  > Dear Dr. Blaha
>      >  > The way you proposed, just worked for RKm=6, and the error below
>      >  > appeared for the case of RKm=7:
>      >  >   'SELECT' - no energy limits found for atom   1  L= 0
>      >  >   'SELECT' - E-bottom -520.00000   E-top -520.00000
>      >  >
>      >  > It is worth to mention that since for Si-muffin tin radius
>     1.68, there
>      >  > is a huge charge leak out, I set the muffin tin raddii as:
>      >  >
>      >  >    1  42.0  2.12  2.2
>      >  >    2  14.0  1.68  2.1
>      >  >    3  7.0  1.61  1.2
>      >  >    4  7.0  1.60  1.2
>      >  >
>      >  > On Saturday, November 11, 2023 at 10:43:42 PM GMT+3:30, Peter
>     Blaha
>      >  > <peter.blaha at tuwien.ac.at <mailto:peter.blaha at tuwien.ac.at>
>     <mailto:peter.blaha at tuwien.ac.at>> wrote:
>      >  >
>      >  >
>      >  > First of all,  setrmt  gives:
>      >  >    1  42.0  2.12  2.12
>      >  >    2  14.0  1.68  1.68
>      >  >    3  7.0  1.61  1.60
>      >  >    4  7.0  1.60  1.60
>      >  >
>      >  > So the N radii are much larger and Si and Mo smaller.
>      >  >
>      >  > It might be that the ghostband comes from N-2s, as the small
>     RMT may not
>      >  > allow for 2 radial functions. You could try to remove the LO
>     for N-s
>      >  > (only keep:
>      >  >    0.30    2  0      (GLOBAL E-PARAMETER WITH n OTHER CHOICES,
>     global
>      >  > APW/LAPW)
>      >  >    0  -1.07    0.0010 CONT 1
>      >  >    1    0.30    0.0000 CONT 1
>      >  > for the N atoms (maybe use instead a HDLO).
>      >  >
>      >  >
>      >  > Am 11.11.2023 um 19:26 schrieb hajar.nejatipoor--- via Wien:
>      >  >  > MoSi2N4
>      >  >  > H   LATTICE,NONEQUIV.ATOMS:  4 187_P-6m2
>      >  >  > MODE OF CALC=RELA unit=bohr
>      >  >  >    5.502431  5.502431 38.534460 90.000000 90.000000120.000000
>      >  >  > ATOM  -1: X=0.00000000 Y=0.00000000 Z=0.00000000
>      >  >  >            MULT= 1          ISPLIT= 4
>      >  >  > Mo1        NPT=  781  R0=0.00001000 RMT=    2.2000   Z: 42.000
>      >  >  > LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
>      >  >  >                       0.0000000 1.0000000 0.0000000
>      >  >  >                       0.0000000 0.0000000 1.0000000
>      >  >  > ATOM  -2: X=0.66666666 Y=0.33333334 Z=0.14710600
>      >  >  >            MULT= 2          ISPLIT= 4
>      >  >  >        -2: X=0.66666668 Y=0.33333334 Z=0.85289400
>      >  >  > Si1        NPT=  781  R0=0.00010000 RMT=    2.1000   Z: 14.000
>      >  >  > LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
>      >  >  >                       0.0000000 1.0000000 0.0000000
>      >  >  >                       0.0000000 0.0000000 1.0000000
>      >  >  > ATOM  -3: X=0.33333333 Y=0.66666667 Z=0.82807700
>      >  >  >            MULT= 2          ISPLIT= 4
>      >  >  >        -3: X=0.33333334 Y=0.66666667 Z=0.17192300
>      >  >  > N 1        NPT=  781  R0=0.00010000 RMT=    1.2000   Z:  7.000
>      >  >  > LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
>      >  >  >                       0.0000000 1.0000000 0.0000000
>      >  >  >                       0.0000000 0.0000000 1.0000000
>      >  >  > ATOM  -4: X=0.66666666 Y=0.33333334 Z=0.93855400
>      >  >  >            MULT= 2          ISPLIT= 4
>      >  >  >        -4: X=0.66666668 Y=0.33333334 Z=0.06144600
>      >  >  > N 2        NPT=  781  R0=0.00010000 RMT=    1.2000   Z:  7.000
>      >  >  > LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
>      >  >  >                       0.0000000 1.0000000 0.0000000
>      >  >  >                       0.0000000 0.0000000 1.0000000
>      >  >
>      >  > --
>      >  >
>      >
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