I am new to LAMMPS and want to use it for drude model. In the paper “Thermalized Drude Oscillators with the LAMMPS Molecular Dynamics Simulator”, about phenol.dff file is mentioned. According to paper it contains information related to drude particle, like charge, force constant, polarizability, thole etc. But it is not completely clear that what would be the format of this file. Can anyone guide me here?