Abstract
We report calculation to rebuild Raman frequencies detected in Raman scattering of high quality wurtzite-type AlN bulk single crystal. Then, we use this Raman verified mode and parameters to calculate mechanical constants and phonon pressure coefficients, which are all important parameters in Raman based stress detection. The relationship between the modes used in Raman rebuilding and constants calculation are discussed in detail. We have predicted for the first time 2ã+b under different pressures. We have oberserved a new trend that 2ã+b is decreasing slightly according to the pressure, oppose to a constant as assumed. This work is a good foundation for stress/strain analysis used in film and device reliability testing.
| Original language | English |
|---|---|
| Pages (from-to) | 342-346 |
| Number of pages | 5 |
| Journal | Computational Materials Science |
| Volume | 112 |
| DOIs | |
| State | Published - 1 Feb 2016 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 Elsevier B.V.
Keywords
- First principle calculation
- Mechanical constants
- Raman scattering
ASJC Scopus subject areas
- General Computer Science
- General Chemistry
- General Materials Science
- Mechanics of Materials
- General Physics and Astronomy
- Computational Mathematics
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