Oxygen vibrational modes in ZnS1−xOxalloys
| Autor: | Jacob R. Ritter, Dinesh Thapa, Jesse Huso, Matthew D. McCluskey, Leah Bergman, Kin Man Yu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Phonon Alloy Wide-bandgap semiconductor General Physics and Astronomy chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Oxygen Molecular physics Condensed Matter::Materials Science Delocalized electron symbols.namesake chemistry Molecular vibration 0103 physical sciences symbols engineering 010306 general physics 0210 nano-technology Raman spectroscopy Wurtzite crystal structure |
| Zdroj: | Journal of Applied Physics. 123:161537 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | ZnS1−xOx alloy films were studied via resonant Raman spectroscopy. Films with a low oxygen content exhibit ZnS longitudinal optical modes and additional modes attributed to O local vibrational modes (LVMs). The frequencies of these modes are explained by a simple mass-defect model. As the O content increases, pairs and larger clusters form, causing the O mode to transition from an LVM to a delocalized phonon. The composition dependence of the modes shows agreement with the modified random element isodisplacement model. Low-temperature measurements show that the O-related mode is composed of multiple features, attributed to zincblende and wurtzite structural regions. |
| Databáze: | OpenAIRE |
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