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lammps/examples/threebody/in.threebody
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in.threebody
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# Simple regression tests for threebody potentials
# NOTE: These are not intended to represent real materials
units metal
atom_style atomic
atom_modify map array
boundary p p p
atom_modify sort 0 0.0
# temperature
variable t equal 1800.0
# cubic diamond unit cell
variable a equal 5.431
lattice custom $a &
a1 1.0 0.0 0.0 &
a2 0.0 1.0 0.0 &
a3 0.0 0.0 1.0 &
basis 0.0 0.0 0.0 &
basis 0.0 0.5 0.5 &
basis 0.5 0.0 0.5 &
basis 0.5 0.5 0.0 &
basis 0.25 0.25 0.25 &
basis 0.25 0.75 0.75 &
basis 0.75 0.25 0.75 &
basis 0.75 0.75 0.25
region myreg block 0 4 &
0 4 &
0 4
create_box 8 myreg
create_atoms 1 region myreg &
basis 1 1 &
basis 2 2 &
basis 3 3 &
basis 4 4 &
basis 5 5 &
basis 6 6 &
basis 7 7 &
basis 8 8
mass * 28.06
velocity all create $t 5287287 mom yes rot yes dist gaussian
# Equilibrate using Stillinger-Weber model for silicon
pair_style sw
pair_coeff * * Si.sw Si Si Si Si Si Si Si Si
thermo 10
fix 1 all nvt temp $t $t 0.1
fix_modify 1 energy yes
timestep 1.0e-3
neighbor 1.0 bin
neigh_modify every 1 delay 10 check yes
run 100
write_restart restart.equil
# Test Stillinger-Weber model for Cd/Te/Zn/Se/Hg/S
clear
read_restart restart.equil
pair_style sw
pair_coeff * * CdTeZnSeHgS0.sw Cd Zn Hg Cd Te S Se Te
thermo 10
fix 1 all nvt temp $t $t 0.1
fix_modify 1 energy yes
timestep 1.0e-3
neighbor 1.0 bin
neigh_modify every 1 delay 10 check yes
run 100
# Test Vashishta model for In/P
clear
read_restart restart.equil
pair_style vashishta
pair_coeff * * InP.vashishta In In In In P P P P
thermo 10
fix 1 all nvt temp $t $t 0.1
fix_modify 1 energy yes
timestep 1.0e-3
neighbor 1.0 bin
neigh_modify every 1 delay 10 check yes
run 100
# Test Tersoff model for B/N/C
clear
read_restart restart.equil
variable fac equal 0.6
change_box all x scale ${fac} y scale ${fac} z scale ${fac} remap
pair_style tersoff
pair_coeff * * BNC.tersoff N N N C B B C B
thermo 10
fix 1 all nvt temp $t $t 0.1
fix_modify 1 energy yes
timestep 1.0e-3
neighbor 1.0 bin
neigh_modify every 1 delay 10 check yes
run 100
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