High pressure luminescence of ZnTe:Cr2+ crystals

Physics

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Scientific paper

Results of the high pressure low-temperature luminescence measurements of ZnTe:Cr2+ crystals in a diamond-anvil cell are reported. The luminescence spectra associated with the 5E→ 5T2 transitions are split into three bands which exhibit quite different pressure coefficients from about 8 to 12 cm-1. The different values of the pressure coefficients are well explained by the Jahn Teller effect and pressure-dependent spin orbit interaction with second-order correction, associated with pressure-dependent admixture of the Te ligand wavefunction to the d-type wavefunction of the Cr2+ ion.

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