SAIP2013

On the metastability of the C center in Silicon: An ab initio study

9 Jul 2013, 17:40

1h

Poster Presentation Track A - Division for Condensed Matter Physics and Materials Poster1

Speaker

Mr Cecil Ouma (Student)

Main supervisor (name and email)<br>and his / her institution

Prof Wlater E Meyer wmeyer@up.ac.za

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

Abstract content <br> &nbsp; (Max 300 words)

The electronic properties of the C center defect in silicon (Si) have been investigated by ab initio density functional theory (DFT). The C center is a boron- vacancy (B-V) pair in Si. We present the properties of four (4) configurations of the C center. We report defect levels for isolated BSi and VSi at Ev+0.07 eV and Ev+0.21 eV respectively for the 0/-1 thermodynamic transition, and Ev+0.08 eV and Ev+0.06 eV for two configurations of the C center compared to experimentally reported levels at Ev+0.5 eV and Ev+0.36 eV. The other two configurations of the C center did not have levels for the 0/-1 transition. We report configurationally charge-induced metastability of the C center in the four different configurations occurring in the negative charge states of the defect.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes