Abstract

A three-body interaction (TBI) potential has been proposed to study the static and dynamic properties of molecular solids. This TBI arises from the variable induced dipoles when the neighbouring molecules overlap. A comparison of the performance of this TBI potential and other two-body potentials has been carried out by calculating the cohesive energy, elastic constants and other thermodynamic properties of solid methane at different temperatures. The proposed TBI potential has been found to describe these properties better than the two-body potentials.

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