A combined high-pressure experimental and theoretical study of the electronic band-structure of scheelite-type AWO4 (A = Ca, Sr, Ba, Pb) compounds
The optical-absorption edge of single crystals of CaWO4, SrWO4, BaWO4, and PbWO4 has been measured under high pressure up to ∼20 GPa at room temperature. From these measurements, we have obtained the evolution of the band-gap energy with pressure. We found a low-pressure range (up to 7–10 GPa) where...
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| Veröffentlicht in: | Journal of applied physics 2011-08, Vol.110 (4) |
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| Hauptverfasser: | , , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The optical-absorption edge of single crystals of CaWO4, SrWO4, BaWO4, and PbWO4 has been measured under high pressure up to ∼20 GPa at room temperature. From these measurements, we have obtained the evolution of the band-gap energy with pressure. We found a low-pressure range (up to 7–10 GPa) where alkaline-earth tungstates present a very small Eg pressure dependence (− 2.1 |
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| ISSN: | 0021-8979 1089-7550 |
| DOI: | 10.1063/1.3622322 |