Controlling standard Coulomb interactions for select terms

Our LAMMPS version is from 29 Sep 2021. We want to utilise Morse potential for LLZO to study grain boundary properties. But the latest version of this softBV potential requires the switching off of the standard
Coulomb interactions and successively switching them back on selectively for the repulsive terms only in the screened Coulomb form.

Is there a way to perform this action in LAMMPS?

Thank you,
Neil

This is too vague a description and I don’t have the time and energy to check out the details of the paper, but this sounds like you need to implement a custom pair style.