[CPMD-list] Help for uspp and model!
=?gb2312?B?c2h5bWE=?=
shyma at imr.ac.cn
Tue May 10 13:10:31 CEST 2005
Dear CPMD user:
I have some questions need your help:
Firstly, I skimed through some papers and find the uspp file is used widely,but the uspp files I find was not compatible with CPMD, I couldn't run the cpmd.x program with K-points successfully when I use the Vanderbilt pesudopotentials that are generated with vesion 7.3.5 of vanderbil
ts atomic code, the out-file showed that
"
PROGRAM STOPS IN SUBROUTINE SETSYS| K-POINTS WITH VANDERBILT NOT IMPLEMENTED [PR
OC= 0]
"
could anyone help me on pesudopontential files which are consistent with GGA(does GGA can get better valuse than LDA, many people said so) and CPMD. So could you e-mail to me if you have these pesudopential?
Secondly, I can't view the structure directly so I'm not sure the model in the cpmd input-file is what I want(the same model of 5 slabs TiN + 10 angstroms vacuum in my mind was used in CASTEP and CPMD, but the total energy of latter is just 1/3 of the former, so I think there some wrong with my cpmd-input-files because I could view the intial model in the castep). I mean that need I use other keyword in the cpmd-input-file and how to constrcut it if I want to construct the model of 2*2 or 3*3 atom on surface in the periodic boundary condition? The following input-file is based on your advices in your last reply, please check and correct it if it doesn't meet the 2*2*5 slabs:
&INFO
(001) slab of TiN, 5 layers + 8 layers of vacuum
&END
&CPMD
OPTIMIZE GEOMETRY
UNITE HESSIAN
BFGS
FREE ENERGY FUNCTIONAL
LANCZOS DIAGONALISATION
LANCZOS PARAMETERS
1 6 20 1.0D-18 !( I don't understand it clearly and imitate from other slab exemple)
TROTTER FACTOR
0.001
ORTHOGONALISATION LOWDIN
CONVERGENCE ORBITAL
1.0D-5
CONVERGENCE GEOMETRY
5.0D-4
MAXSTEP
1000
MEMORY BIG
ELECTRON TEMPERATURE
1000
COMPRESS WRITE32
STRUCTURE BONDS
&END
&SYSTEM
POINT GROUP
AUTO
SYMMETRY
8
ANGSTROM
SCALE
CELL
3.182 1.0 9.2 0.0 0.0 0.0
CUTOFF
50.OO
STATES
30
TESR !( I don't understand it clearly and imitate from other slab exemple)
3
KPOINTS MONKHORST-PACK FULL
8 8 1
&END
&DFT
FUNCTIONAL LDA
&END
&ATOMS
*Ti_MT_LDA_NLCC.psp KLEINMAN-BYLANDER
LMAX=D
5
0 0 0
1/2 1/2 1/13
0 0 2/13
1/2 1/2 3/13
0 0 4/13
*N_GO_LDA.psp KLEINMAN-BYLANDER
LMAX=P
5
1/2 1/2 0
0 0 1/13
1/2 1/2 2/13
0 0 3/13
1/2 1/2 4/13
&END
Best wishes!
Thanks in advance!
yours shyma
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