Assessment of random-phase approximation and second order Møller-Plesset perturbation theory for many-body interactions in solid ethane, ethylene, and acetylene

Khanh Ngoc Pham, Marcin Modrzejewski, Jiří Klimeš

The relative energies of different phases or polymorphs of molecular solids can be small, less than a kiloJoule/mol. Reliable description of such energy differences requires high q…