Configuration of Li acceptor in ZnSe determined by infrared magnetoabsorption measurements

Abstract

Based on the experimental results of the infrared magnetoabsorption measurements, we propose that a Li acceptor is displaced from its proper substitutional site in ZnSe. Infrared absorption spectra in magnetic fields reveal additional splitting of acceptor levels that cannot be understood in the framework of cubic symmetry. The splitting is caused by the symmetry lowering induced by the displacement of the Li atom. The splitting of the 1S 3/2 ground state is estimated to be 2.9 meV. The 2 P 3/2 , 2S 3/2 , and 2 P 5/2 (⌫ 8 ) states split into two states, and the magnitude of the splitting is estimated to be 5.5, 5.3, and 5.6 meV, respectively.