Observation of new states of an exciton bound to Ni2+ in ZnSe
Sokolov V. I. , Nikiforov A. E., Chernyaev V. V., Shashkin S. Yu.
New absorption lines corresponding to an exciton bound to Ni2+ have been observed in the energy interval 2.640-2.750 eV in ZnSe:Ni in a strong alternating electric field. These lines, together with a line reported previously at 1.816 eV, constitute the first experimental proof of the complex spectrum of the exciton bound to Ni2+ in ZnSe:Ni. A group-theoretical analysis is carried out for the states of the exciton bound to Ni2+.