"Pressure dependence of the bandgap bowing in zinc-blende ZnTe_1-xSe_x",
Sotto A, Guder HS, Perez-Pastor A, Segura A, Zuniga J, Munoz V
High Pressure Research 22, 257-260 (2002)

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We report on the pressure dependence of the bandgap bowing in the ZnTe_1-xSe_x alloy, in the whole composition range. The bandgap bowing parameter is shown to increase almost linearly with pressure from 1.23 at ambient pressure to 1.6 at 7 GPa. Saturation effects observed in the pressure dependence for x = 0.1 and x = 0.2 are shown to be related to the direct-to-indirect crossover. Results are discussed and interpreted in the framework of structural relaxation models for gap bowing. A prediction of these models (the negative bowing of the G15₁₅ - X₁₅ transition) is shown to be compatible with the fact that the direct-to-indirect crossover pressure increases with the Se content.