Prezzi, D. and Eberlein, T.A.G. and Jones, R. and Hourahine, B. and Briddon, P.R. and Öberg, S. (2004) Hydrogen-related photoluminescent centers in SiC. Physical Review B: Condensed Matter and Materials Physics, 70 (20). pp. 205207-1. ISSN 1098-0121
Full text not available in this repository. (Request a copy from the Strathclyde author)Abstract
Local density functional calculations are used to investigate models of the center responsible for a prominent set of luminescent lines with zero-phonon lines around 3.15 eV in hydrogen rich 4H-SiC and previously attributed to VSi-H. We find that the electronic structure of this defect and the character of its vibrational modes are inconsistent with this assignment. In contrast, a H2 * center, bound to a carbon anti-site, is more stable than the isolated molecule and possesses a donor level close to that observed for the H-lines. Moreover, its vibrational modes are in good agreement with experiment. A possible mechanism for the radiation enhanced quenching of the defect is discussed.
| Item type: | Article |
|---|---|
| ID code: | 2964 |
| Keywords: | local density functional calculations, photoluminescent centers, SiC, nanoscience, Solid state physics. Nanoscience |
| Subjects: | Science > Physics > Solid state physics. Nanoscience |
| Department: | Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences Faculty of Science > Physics |
| Related URLs: | |
| Depositing user: | Strathprints Administrator |
| Date Deposited: | 12 Mar 2007 |
| Last modified: | 02 Oct 2012 15:36 |
| URI: | http://strathprints.strath.ac.uk/id/eprint/2964 |
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