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- W1973551331 abstract "Abstract The optical band gaps of K2ZnCl4 single crystals doped with Cs+ in the three crystallographic directions at different temperatures were calculated in both direct and indirect transitions. The data on the allowed indirect transition was analyzed and interpreted in terms of valence band initiated by spin-orbit interaction and crystal field splitting. The energy difference Ep between Eg1, the first valence and conduction band and Eg2 for the second valence band was calculated. Analysis of absorption spectra indicates that for a- and c-axes, the indirect Egi and direct Egd energy gaps decreased with increasing temperature. The anomalous behavior of the band gap in the b-axis was attributed to the relatively weak electrostatic interactions between the cations and the stacks. The results are discussed in comparison with our previous work on pure and Mn2+ doped K2ZnCl4 single crystals." @default.
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- W1973551331 date "2001-09-01" @default.
- W1973551331 modified "2023-09-27" @default.
- W1973551331 title "Optical studies of K2ZnCl4 single crystals doped with Cs+ in the ferroelectric phase" @default.
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- W1973551331 doi "https://doi.org/10.1016/s0921-4526(01)00394-5" @default.
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