9-13 July 2012
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=11&confId=14"><font color=#ff0000>SAIP2012 PROCEEDINGS AVAILABLE</font></a>

Structural, Electronic and Optical Properties of Gold Nitrides

11 Jul 2012, 16:50
20m
Oral Presentation Track A - Division for Condensed Matter Physics and Materials DCMPM2

Speaker

Mr MOHAMMED SULEIMAN (School of Physics, University of the Witwatersrand, Johannesburg, Sout Africa.)

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

Yes

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

The atomic and electronic structures of AuN, AuN2 and Au3N are investigated using first-principles density-functional theory (DFT). We studied cohesive energy vs. volume data for a wide range of possible structures of these nitrides. Obtained data was fitted to Birch-Murnaghan third-order equation of state (EOS) so as to identify the most likely candidates for the true crystal structure in this subset of the infinite parameter space, and to determine their equilibrium structural parameters. The analysis of the electronic properties was achieved by the calculations of the band-structure and the total and partial density of states (DOS). Some possible pressure-induced structural and electronic phase transitions have been pointed out. Further, we carried out expensive GW0 calculations within the random-phase approximation (RPA) to the dielectric tensor to investigate their optical spectra. Obtained results were compared with theory and with experiment.

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

PhD

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

Yes

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

Daniel P. Joubert,
daniel.joubert2@wits.ac.za,
School of Physics, University of the Witwatersrand.

Primary author

Mr MOHAMMED SULEIMAN (School of Physics, University of the Witwatersrand, Johannesburg, Sout Africa.)

Co-author

Prof. DANIEL JOUBERT (School of Physics, University of the Witwatersrand, Johannesburg, Sout Africa.)

Presentation Materials

Peer reviewing

Paper