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The pressure dependence of the direct band gap of CdTe has been measured by observing the direct exciton photoluminescence and donor-acceptor pair photoluminescence under hydrostatic pressures up to 35 kbar. A value of 6.5+or-0.2 meV kbar -1 was obtained corresponding to a hydrostatic deformation potential a=-2.74+or-0.09 eV. From a tight-binding calculation the authors estimate the valence and conduction band contributions to a.
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Dunstan et al. (1989) studied this question.
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