Phosphorus and Arsenic Impurity Centers in ZnSe. I. Paramagnetic Resonance

Abstract

By means of electron paramagnetic resonance, phosphorus and arsenic impurities in ZnSe are identified to occur substitutional for selenium in crystalline material doped during growth from the melt. They are unassociated centers; however, their symmetry is lowered from $T_d$ to $C_{3v}$ by a Jahn-Teller distortion. Optical excitation can be used to change the density of those which are paramagnetic, i.e., ${\mathrm{P}}_{\mathrm{Se}}\left(3\mathrm{}{s}^{2}3p^5\right)$ and ${\mathrm{As}}_{\mathrm{Se}}\left(4\mathrm{}{s}^{2}4p^5\right)$.