Optical absorption edge of GaS under hydrostatic pressure

Optical absorption edge of GaS under hydrostatic pressure

The pressure variation of the optical edge of GaS has been measured. The direct exciton has been studied up to 6 kbar at 77 K and the indirect edge up to 40 kbar at 300 K. The exciton is shown to have a coefficient of −2 ± 0.5 × 10 −6eV/bar and the indirect edge of − ll ± 1.5× 10 −6eV/bar. A discuss...

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Veröffentlicht in:The Journal of physics and chemistry of solids 1978, Vol.39 (1), p.25-28
Hauptverfasser: Mejatty, M., Segura, A., Le Toullec, R., Besson, J.M., Chevy, A., Fair, H.
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Sprache:eng
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Zusammenfassung:The pressure variation of the optical edge of GaS has been measured. The direct exciton has been studied up to 6 kbar at 77 K and the indirect edge up to 40 kbar at 300 K. The exciton is shown to have a coefficient of −2 ± 0.5 × 10 −6eV/bar and the indirect edge of − ll ± 1.5× 10 −6eV/bar. A discussion of the values of the pressure coefficients for direct and indirect transitions in gallium chalcogenides is given.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(78)90194-4