Changes in the indirect band gap of GaP due to uniaxial strain compression were observed using photoluminescence (PL) spectroscopy in shock wave experiments. Longitudinal stresses up to were generated in , , and  orientated samples. PL lines from sulfur bound excitons exhibited redshifts upon shock compression. At larger uniaxial strains, the measured shifts were smaller than predicted from published optical deformation potentials for GaP. It is shown that overestimation of spin-dependent interactions is most likely responsible for the observed discrepancies. An accurate set of deformation potentials for GaP is derived.
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Research Article| April 08 2008
Band-gap luminescence of GaP:S shock compressed to
M. D. McCluskey;
P. Grivickas, M. D. McCluskey, Y. M. Gupta; Band-gap luminescence of GaP:S shock compressed to . Appl. Phys. Lett. 7 April 2008; 92 (14): 142104. https://doi.org/10.1063/1.2907499
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