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Abstract:
The ground state of the lattice-neutral charge state of vanadium in tetrahedrally coordinated II—VI materials is a 4T1 term and is hence subject to a Jahn-Teller (JT) effect. In this paper photo-luminescence and EPR investigations on V2+ (3d3) in ZnS, ZnSe, ZnTe, and CdTe are combined with Tanabe-Sugano calculations including JT interaction. For ZnS the no-phonon structure is explained by a tunnelling splitting.