Strongly anisotropic behavior of A1(TO) phonon mode in bulk AlN
| Autor: | Fa Di Li, Wei Zheng, Rui Sheng Zheng, Hong Lei Wu |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Phase difference
Materials science Condensed matter physics Phonon Mechanical Engineering Metals and Alloys Polarization (waves) Condensed Matter::Materials Science symbols.namesake Mechanics of Materials Materials Chemistry symbols Angular dependence Raman spectroscopy Anisotropy Raman scattering Wurtzite crystal structure |
| Zdroj: | Journal of Alloys and Compounds. 584:374-376 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2013.09.102 |
| Popis: | Angle-dependent Raman scattering is performed on an m-plane AlN bulk crystal. The angular dependence of A1(TO) phonon mode shows strongly anisotropic behavior that the Raman intensity in xx polarization is 6.5 times larger than that in zz polarization. Both anisotropy ratio and phase difference between the independent Raman tensor elements Rxx and Rzz of the A1(TO) mode are derived from the Raman spectra. It is found that the |Rxx|/|Rzz| ratio is up to 2.54, which is noticeably higher than that of wurtzite GaN (1.30) and ZnO (1.02). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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