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Optical-absorption edge of CsI up to 58 @Pa

Abstract : The optical transmittancy of cesium iodide single crystals has been studied up to 58 GPa, using xenon as a pressure-transmitting medium. The shape and position of the absorption edge under pressure has been measured under controlled stress-homogeneity conditions. It is found to differ significantly from previous results obtained on highly strained powder samples. The data are analyzed in terms of band-to-band transitions and show that band closing in cesium iodide is not to be expected below 90 GPa.
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Submitted on : Monday, December 21, 2020 - 5:08:14 PM
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  • HAL Id : hal-03085341, version 1


J Itic, A Polian, J Besson. Optical-absorption edge of CsI up to 58 @Pa. Physical Review B: Condensed Matter (1978-1997), American Physical Society, 1984. ⟨hal-03085341⟩



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