Complex sentence: This mechanism is associated to the vibronic couplings between adiabatic PES separated by significant gaps: its inclusion broadens the applicability of JT-related models to symmetry-breaking in a far broader range of molecular and solid-state systems.
Split into simpler sentences: This mechanism is associated to the vibronic couplings between adiabatic potential energy surfaces separated by significant gaps. Its inclusion broadens the applicability of JT-related models to symmetry-breaking in a far broader range of molecular and solid-state systems.