Check out the published literature. That is a better source for this kind of knowledge.
Please note that this is not really a LAMMPS problem, but a question of how to do research and that is a discussion you should have with people that know and care about your research, like your adviser or supervisor or colleagues or collaborators. After all, it would look rather strange when you write in your paper “some random dude on the internet told me to do this”.
You should probably also check out this recent discussion: Using electric field in reaxff period boundary