The effective surface Debye temperature of Yb:GaN
| Autor: | John W. McClory, R. Palai, Ihor Ketsman, Peter A. Dowben, Stephen R. McHale, James C. Petrosky, J. Wu |
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| Rok vydání: | 2011 |
| Předmět: |
Ytterbium
Materials science Condensed matter physics Photoemission spectroscopy Mechanical Engineering chemistry.chemical_element Condensed Matter Physics Bond length symbols.namesake chemistry Mechanics of Materials symbols General Materials Science Effective surface Thin film Gallium Debye model Debye |
| Zdroj: | Materials Letters. 65:1476-1478 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2011.02.042 |
| Popis: | The effective Debye temperature of ytterbium and gallium in Yb:GaN thin films has been obtained using X-ray photoemission spectroscopy. The vibrational motion normal to the surface results in a dimunition of photoemission intensities from which we have estimated the effective Debye temperatures of 221 ± 30 K and 308 ± 30 K for Yb and Ga, respectively. The difference between the measured values for Yb and Ga suggests that the Debye temperatures are influenced by the local environment. The smaller effective surface Debye temperature for Yb correlates to a soft, strained surface, possibly due to an increased Yb―N bond length as compared to the Ga―N bond length. |
| Databáze: | OpenAIRE |
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