I would like to use Lammps so investigate ion implantation of H, Ar into
a Si wafer. When I use
velocity Argon set 0 0 5 units box
velocity Silicon create 200.00 2349852
to create the initial velocities and use the following fix to
fix 3 Silicon nvt 300.00 300.00 0.018
the system temperature goes to zero after 2 steps and it never changes.
I have created two groups (Argon and Silicon at the beginning.
Any idea what I'm doing wrong?