Multi-walled CNT with Sic.Tersoff

Hi all

I am simulating a multi-walled Carbon nanotube with SiC.tersoff

in the data_file I define two atom_type for inner and outer tubes

Dear Mehdi,

You can not use pair style twice, if you need to use tersoff and LJ
potential or more simultaneously then you must use pair style hybrid.
see http://lammps.sandia.gov/doc/pair_hybrid.html

Farrokh