Diamagnetic biexcitons: magnetic-field-induced dissociation and change of binding type

Abstract

The transformation of electron molecular terms of the excitonic molecule ex2+ and of the molecular ion ex2+ in a strong magnetic field is studied. The anisotropy of molecular terms leading to the biexciton orientation along the field is calculated. The possibility of magnetic-field-induced biexciton dissociation in a strong field and magnetic-field-induced van der Waals binding of excitons in the excitonic molecule is discussed.