Influence of the Jahn-Teller effect on the Zeeman splittings of the 4T2 level of Mn2+ in ZnS

Abstract
The Zeeman effect has been used to analyse the fine structure of the lowest 4T2 level of Mn2+ in ZnS. We have measured the Zeeman splittings and the relative intensities for different polarizations in a 100 kG superconducting magnet. In order to interpret the experimental spectra, a cluster model is assumed and Ham effects are considered. A medium Jahn-Teller coupling with an E vibrational mode can explain the Zeeman splittings observed in high magnetic field. A better fit is obtained for S = 2 than for S = 0.6, the value previously proposed from uniaxial stress experiments. However the theoretical intensities are not in good agreement with those observed