exponential form of van der Waals interaction

Dear LAMMPS users,

I am trying to model the interaction between Nb and H. Searching the literature, I found out that 12-6 potentials can not very well define the van der Waals interactions in this system. The best potential available has the form: Aexp(-B/r). I searched the LAMMPS manual but I couldn’t find this form. I would appreciate any input that helps me apply this form in LAMMPS.

Thanks,
Iman.

Well, you can use Buckingham (http://lammps.sandia.gov/doc/pair_buck.html) and define C = 0.

Ray

Thanks Ray. This is what I was looking for.

Best,
Iman.