Indeed, this occurs in experiments due to the presence of a dipolar magnetic field and/or the driving AC magnetic field, and we therefore apply a magnetic field of 2 Oe along the main magnetic axis of the molecule, splitting the ground doublet by ca. 0.002 cm -1 . The Raman mechanism involves pairs of phonons, and the rate is obtained as the double integral over their lineshapes. We restrict the domain of the phonon energies to 0 ≤ 𝜔 ≲ 𝜔 89: , where 𝜔 89: