No, I don't think this will work. You need to just use tersoff
with all 4 types (don't need to use hybrid), then turn
off 1-3, 1-4, etc with neigh_modify exclude. That will trim
down the neighbor list passed to tersoff, which will not
happen with what you have below. It would be a good
test to verify that the 2 approaches give different answers
(e.g. forces/pressure on step 0), assuming the 2 CNTs
are close enough to interact.
Steve