GAPW, OT and TPSS: possibly bug?

efefer fadjar.fa... at gmail.com
Thu Nov 1 09:05:42 UTC 2012


Dear, cp2k-users,

I am trying to test TPSS functional using GAPW basis set.

Here is my input file (a bit modified from test directory):

&FORCE_EVAL
  METHOD Quickstep
  
  &DFT
    
    &MGRID
      CUTOFF 200
    &END MGRID

    &QS
      METHOD GAPW
    &END QS

    &SCF
      SCF_GUESS atomic
      MAX_SCF 200

      &OT
        PRECONDITIONER FULL_ALL
      &END

    &END SCF

    &XC
      DENSITY_CUTOFF 1.e-9
      DENSITY_SMOOTH_CUTOFF_RANGE 0
      FUNCTIONAL_ROUTINE NEW
      &XC_FUNCTIONAL tpss
      &END XC_FUNCTIONAL
      &XC_GRID
        XC_DERIV NN50_SMOOTH
        XC_SMOOTH_RHO NONE
      &END XC_GRID
    &END XC

  &END DFT

  &SUBSYS
    &CELL
      ABC 5.0 5.0 5.0
    &END CELL
    &COORD
    O   0.000000    2.000000    1.934413
    H   0.000000    1.242864    2.520545
    H   0.000000    2.757136    2.520545
    O   2.500000    2.000000    1.934413
    H   2.500000    1.242864    2.520545
    H   2.500000    2.757136    2.520545
    &END COORD
    
    &KIND H
      BASIS_SET DZVP-ALL
      POTENTIAL ALL
    &END KIND
    
    &KIND O
      BASIS_SET DZVP-ALL
      POTENTIAL ALL
    &END KIND

  &END SUBSYS
&END FORCE_EVAL

&GLOBAL
  PROJECT cp2k
  PRINT_LEVEL MEDIUM
&END GLOBAL

The problem is the total energy is not converged even tough it is no longer 
changed after several.
The calculation should be converged, I think.

     1 OT CG       0.15E+00    0.5     0.40335650      -144.2533547430 
-1.44E+02
     2 OT LS       0.21E+00    0.3                     -151.8790432048
     3 OT CG       0.21E+00    0.6     0.09364597      -152.1234077905 
-7.87E+00
     4 OT LS       0.15E+00    0.3                     -152.2361299031
     5 OT CG       0.15E+00    0.6     0.08707779      -152.2473707959 
-1.24E-01
     6 OT LS       0.15E+00    0.3                     -152.5281863016
     7 OT CG       0.15E+00    0.6     0.02895027      -152.5278047064 
-2.80E-01
     8 OT LS       0.33E+00    0.3                     -152.5752542842
     9 OT CG       0.33E+00    0.6     0.01873838      -152.6130351607 
-8.52E-02
    10 OT LS       0.10E+01    0.3                     -152.6595749764
    11 OT CG       0.10E+01    0.6     0.04422480      -152.6414854921 
-2.85E-02
    12 OT LS       0.15E+00    0.3                     -150.3511442819
    13 OT CG       0.15E+00    0.6     0.00692364      -152.6920752625 
-5.06E-02
    14 OT LS       0.59E+00    0.3                     -152.6966983923
    15 OT CG       0.59E+00    0.6     0.00919849      -152.7030648221 
-1.10E-02
    16 OT LS       0.14E+00    0.3                     -152.6916896508
    17 OT CG       0.14E+00    0.6     0.00916287      -152.7029171232  
1.48E-04
    18 OT LS       0.56E-01    0.3                     -152.7012989177
    19 OT CG       0.56E-01    0.6     0.00671736      -152.7027661541  
1.51E-04
    20 OT LS       0.21E-01    0.3                     -152.7023780090
    21 OT CG       0.21E-01    0.6     0.00607521      -152.7026557917  
1.10E-04
    22 OT LS       0.80E-02    0.3                     -152.7025307366
    23 OT CG       0.80E-02    0.6     0.00586228      -152.7026130358  
4.28E-05
    24 OT LS       0.30E-02    0.3                     -152.7025687899
    25 OT CG       0.30E-02    0.6     0.00578611      -152.7025970226  
1.60E-05
    26 OT LS       0.11E-02    0.3                     -152.7025808253
    27 OT CG       0.11E-02    0.6     0.00575810      -152.7025910424  
5.98E-06
    28 OT LS       0.42E-03    0.3                     -152.7025850377
    29 OT CG       0.42E-03    0.6     0.00574770      -152.7025888093  
2.23E-06
    30 OT LS       0.16E-03    0.3                     -152.7025865727
    31 OT CG       0.16E-03    0.6     0.00574383      -152.7025879752  
8.34E-07
    32 OT LS       0.58E-04    0.3                     -152.7025871407
    33 OT CG       0.58E-04    0.6     0.00574238      -152.7025876637  
3.12E-07
    34 OT LS       0.15E-04    0.3                     -152.7025868225
    35 OT CG       0.15E-04    0.6     0.00574201      -152.7025870527  
6.11E-07
    36 OT LS       0.57E-05    0.3                     -152.7025869713
    37 OT CG       0.57E-05    0.6     0.00574187      -152.7025870223  
3.04E-08
    38 OT LS       0.21E-05    0.3                     -152.7025869919
    39 OT CG       0.21E-05    0.6     0.00574182      -152.7025870110  
1.14E-08
    40 OT LS       0.79E-06    0.4                     -152.7025869996
    41 OT CG       0.79E-06    0.6     0.00574180      -152.7025870067  
4.24E-09
    42 OT LS       0.30E-06    0.3                     -152.7025870025
    43 OT CG       0.30E-06    0.6     0.00574179      -152.7025870051  
1.58E-09
    44 OT LS       0.11E-06    0.3                     -152.7025870036
    45 OT CG       0.11E-06    0.6     0.00574179      -152.7025870045  
5.91E-10
    46 OT LS       0.41E-07    0.3                     -152.7025870040
    47 OT CG       0.41E-07    0.6     0.00574179      -152.7025870043  
2.21E-10
    48 OT LS       0.15E-07    0.3                     -152.7025870041
    49 OT CG       0.15E-07    0.6     0.00574179      -152.7025870042  
8.26E-11
    50 OT LS       0.58E-08    0.3                     -152.7025870042
    51 OT CG       0.58E-08    0.6     0.00574179      -152.7025870042  
3.07E-11
    52 OT LS       0.21E-08    0.3                     -152.7025870042
    53 OT CG       0.21E-08    0.6     0.00574179      -152.7025870042  
1.16E-11
    54 OT LS       0.80E-09    0.3                     -152.7025870042
    55 OT CG       0.80E-09    0.6     0.00574179      -152.7025870042  
4.26E-12
    56 OT LS       0.30E-09    0.3                     -152.7025870042
    57 OT CG       0.30E-09    0.6     0.00574179      -152.7025870042  
1.59E-12
    58 OT LS       0.11E-09    0.3                     -152.7025870042
    59 OT CG       0.11E-09    0.6     0.00574179      -152.7025870042  
7.11E-13
    60 OT LS       0.46E-10    0.3                     -152.7025870042
    61 OT CG       0.46E-10    0.6     0.00574179      -152.7025870042  
1.42E-13
    62 OT LS       0.18E-10    0.3                     -152.7025870042
    63 OT CG       0.18E-10    0.6     0.00574179      -152.7025870042  
1.42E-13
    64 OT LS       0.77E-11    0.3                     -152.7025870042
    65 OT CG       0.77E-11    0.6     0.00574179      -152.7025870042 
-5.68E-14
    66 OT LS       0.31E-10    0.3                     -152.7025875339
    67 OT CG       0.31E-10    0.6     0.00574178      -152.7025875339 
-5.30E-07
    68 OT LS       0.10E-10    0.3                     -152.7025875339
    69 OT CG       0.10E-10    0.6     0.00574178      -152.7025875339  
1.42E-13
........

I have to do soft exit to stop the calculation.

However this problem was not encountered when diagonalization+mixing method 
was used (the default). The total energy value was different though:

grep 'Total energy:' LOG*
LOG_mix:  Total energy:                                              
-152.66576449824842
LOG_ot:  Total energy:                                              
-152.70258806262012

I'm using CP2K-2.4 (devel, revision number 12440), compiled on 32bit Linux 
machine using OpenMPI+ifort2011.

This problem was also encountered in the previous 2.2.426 version. I also 
tried the 64 bit version (also using Intel compiler).

Is this probably bug?

Thank you very much in advance.

Fadjar F.

Grad.School.of.Eng, Appl. Phys. Dept, Osaka University
Japan
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