Based on the VASP wiki example in this link
Task: Relaxation of the internal coordinates of a perturbed cubic diamond Si structure.
First, copy the example folder which contains some of the VASP input files and useful scripts
cp -r /software/sse/manual/vasp/training/ws2022/cd_Si_relax .
cd cd_Si_relax
and copy the latest POTCAR file for Si:
cp /software/sse/manual/vasp/POTCARs/PBE/2015-09-21/Si/POTCAR .
POSCAR
cubic diamond Si
5.5
0.0 0.5 0.5
0.5 0.0 0.5
0.5 0.5 0.0
Si
2
Direct
-0.125 -0.125 -0.125
0.125 0.125 0.130
INCAR
System = diamond Si
ISTART = 0
ICHARG=2
ENCUT = 240
ISMEAR = 0
SIGMA = 0.1
NSW = 10
IBRION = 2
ISIF = 2
EDIFFG = -0.0001
KPOINTS
k-points
0
Monkhorst Pack
11 11 11
0 0 0
The input files are ready for the atom relaxation, so the job can be started directly
sbatch run.sh
Check the progress of the relaxation by e.g.
cat slurm*out
cat OSZICAR
the calculation should be quite fast. At the end of OUTCAR, e.g. using less
, check the final forces
POSITION TOTAL-FORCE (eV/Angst)
-----------------------------------------------------------------------------------
4.81938 4.81938 4.81254 -0.000143 -0.000143 -0.001100
0.69437 0.69437 0.68746 0.000143 0.000143 0.001100
-----------------------------------------------------------------------------------
total drift: 0.000001 0.000001 -0.000003
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