which potential style is suitable indenter substrate interaction!!

Dear Steve,

I am trying to simulate the nanoindentation modeling indenter explicitly.
i hav a confusion regarding in general which type of repulsive potential (i.e. Harmonic, morse repulsive part only) is suitable to describe the interaction b/w
indenter and substrate atoms to indented!!

thanking you

That's really up to you. People do it differently
for different simulations.