Buckingham Potential

The Coulomb-Buckingham potential is an extension of the Buckingham potential for application to ionic systems. The formula for interaction is

$\Phi_{12}(r) = A \exp \left(-Br\right) - \frac{C}{r^6} + \frac{q_1q_2}{4\pi\varepsilon_0 r}$

LAMMPS

pair_coeff <i> <j> <A> <rho> <C> <cutoff_buckingham> <cutoff_coulumb>

rho > 0

[1] R.A. Buckingham. The Classical Equation of State of Gaseous Helium, Neon, and Argon. Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences 168, 264-283 (1938)

[2]

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