Printing Core Charges for Bader analysis
Satish Kumar
satis... at gmail.com
Fri Jun 10 22:21:35 UTC 2016
Hello CP2K users
I was trying to obtain "proper?" Bader charges (Using Henkelman's program)
for a CO2 molecule. Right now, I am getting the charge associated with C
atom to be zero. In VASP, we can add the LAECHG=TRUE tag that will print
the core charges too (http://theory.cm.utexas.edu/henkelman/code/bader/).
Doing so in VASP gives a reasonable (around 2 electrons) charge associated
with C atom. After looking up the CP2K Google group I tried a couple of
other options in an attempt to get the total (valence + core) charge
density. I tried the following print sections:
1)
&PRINT
&E_DENSITY_CUBE
STRIDE 1
&END E_DENSITY_CUBE
&END PRINT
2)
&PRINT
&E_DENSITY_CUBE
STRIDE 1
TOTAL_DENSITY .TRUE.
&END E_DENSITY_CUBE
&END PRINT
3) This one gave wrong results I think (number of electrons estimated from
Bader was 0).
&PRINT
&TOT_DENSITY_CUBE
STRIDE 1
&END TOT_DENSITY_CUBE
&END PRINT
Input file:
&FORCE_EVAL
METHOD Quickstep
&DFT
UKS
BASIS_SET_FILE_NAME /home/siyemperumal/GTH_BASIS_SETS_5-12-10
POTENTIAL_FILE_NAME /home/siyemperumal/GTH_POTENTIALS_5-12-10
WFN_RESTART_FILE_NAME co2-RESTART.wfn
&MGRID
CUTOFF 1600
&END MGRID
&QS
WF_INTERPOLATION ASPC
EXTRAPOLATION_ORDER 3
&END QS
&SCF
EPS_SCF 1.E-6
SCF_GUESS RESTART
MAX_SCF 500
&OT T
PRECONDITIONER FULL_SINGLE_INVERSE
MINIMIZER DIIS
LINESEARCH 3PNT
&END OT
&END SCF
&XC
&XC_FUNCTIONAL PBE
&END XC_FUNCTIONAL
&VDW_POTENTIAL
DISPERSION_FUNCTIONAL PAIR_POTENTIAL
&PAIR_POTENTIAL
TYPE DFTD3(BJ)
PARAMETER_FILE_NAME
/home/siyemperumal/Research/cp2k/package/cp2k/data/dftd3.dat
REFERENCE_FUNCTIONAL PBE
&PRINT_DFTD MEDIUM
&END PRINT_DFTD
&END PAIR_POTENTIAL
&END VDW_POTENTIAL
&END XC
&PRINT
#Tried the above three combinations
&END PRINT
&END DFT
&SUBSYS
&CELL
ABC 12.00 13.00 14.00
&END CELL
&TOPOLOGY
&END TOPOLOGY
&COORD
C 0.0000153980 0.0000010425 0.0006891492
O 1.1762907217 0.0000004039 0.0006107401
O -1.1763057650 -0.0000013603 0.0006092107
&END COORD
&KIND O
BASIS_SET DZVP-MOLOPT-GTH
POTENTIAL GTH-PBE-q6
&END KIND
&KIND C
BASIS_SET DZVP-MOLOPT-GTH
POTENTIAL GTH-PBE-q4
&END KIND
&END SUBSYS
&END FORCE_EVAL
&GLOBAL
PROJECT co2
RUN_TYPE ENERGY
#RUN_TYPE GEO_OPT
PRINT_LEVEL LOW
&END GLOBAL
&MOTION
&GEO_OPT
MAX_ITER 200
MAX_FORCE 0.0009725 #0.05 eV/A
OPTIMIZER BFGS
&END GEO_OPT
&END MOTION
Related Output that is printed:
Electronic density on regular grids: -15.9999999999
0.0000000001
Core density on regular grids: 15.9999999994
-0.0000000006
Total charge density on r-space grids: -0.0000000005
Total charge density g-space grids: -0.0000000005
Thank you for any ideas.
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