Configuration Interaction in Jahn-Teller Systems: Homogeneous Broadening of Zero-Phonon Lines Due to Nonradiative Transitions

Abstract

Fano's theory of configuration interaction has been extended to Jahn-Teller systems. Homogeneous broadening and shift of the zero-phonon lines are directly connected with interlevel spin-orbit interaction and with the density of states of the interacting continuum. Application to MgO: ${\mathrm{V}}^{2+}$ and ${\mathrm{Al}}_2$ ${\mathrm{O}}_3$: ${\mathrm{Cr}}^{3+}$ gives excellent agreement between theory and experiment.