LJ repulsive term

Dear Lammps users
i am using lammps to study polymer membrane systems. the initial amorphous cell was constructed using materials studio software at very low density and then exported to be used using lammps. in the literature it was said that to get true density of such systems, only repulsive part of the lj interaction should be considered during first steps of the simulation. i don’t know how can i do this point.

best regards
ghasem

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Dear Lammps users
i am using lammps to study polymer membrane systems. the initial amorphous cell was constructed using materials studio software at very low density and then exported to be used using lammps. in the literature it was said that to get true density of such systems, only repulsive part of the lj interaction should be considered during first steps of the simulation. i don't know how can i do this point.

how about setting the cutoff to the minimum of the potential?

axel.