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First principles potential between fullerenes

Authors: J. P. Prates Ramalho and J. M. Pacheco

Ref.: Physics Letters 79 (20), 3873-3876 (1997)

Abstract: We compute, from first principles, the dispersion interaction between two and three fullerenes, in time-dependent density functional theory. These results, complemented with total energy calculations at small and intermediate distances, lead to a parameter-free determination of the interaction between fullerenes. Agreement with experiment, within 4%, is found for all quantities, computed via Monte Carlo simulations of fullerite. Inclusion of the three-body term is found to increase by 6% the cohesive energy at equilibrium density