This repository is a test case for the compute born/matrix. It provides short scripts creating argon fcc crystal and computing the Born term using the two methods described in the documentation.
In the Analytical directory the terms are computed using the analytical derivation of the Born term for the lj/cut pair style.
In the Numdiff directory, the Born term is evaluated through small numerical differences of the stress tensor. This method can be used with any interaction potential.
Both script show examples on how to compute the full Cij elastic stiffness tensor in LAMMPS.