@inproceedings{12d1818113d0477b97e4a8a27fdb3bf6,
title = "Wurtzite-to amorphous-to cubic phase transition of GaN1-x Asx alloys with increasing As content",
abstract = "This paper describes Transmission Electron Microscopy studies of the structural changes of GaN1-xAsx alloys grown by Molecular Beam Epitaxy at low temperatures on Al2O3 substrate. We found that by lowering the growth temperature increasing amount of As can be incorporated in GaN1-xAsx forming a single phase alloy. For the low As content a columnar growth of wurtzite structure is observed but for increasing As in the range of 0.170.75 the layer becomes amorphous. Increase in Ga flux at low growth temperature (about 200°C) leads to columnar alloys with As content >75\% with a cubic structure. In addition to the structural changes monotonic change of the band gap is also observed with the As content in the alloy. The amorphous alloy is stable up to annealing at temperatures not higher than 600°C. Annealing at higher temperature leads to phase separation of GaAs:N and GaN:As confirmed by Z-contrast electron microscopy. {\textcopyright} 2012 Trans Tech Publications, Switzerland.",
keywords = "Amorphous, Bandgap, Columnar structure, Cubic, GaNAs, Phase transformation, Wurtzite",
author = "Z. Liliental-Weber and \{Dos Reis\}, R. and A. Levander and Yu, \{K. M.\} and W. Walukiewicz and Novikov, \{S. V.\} and Foxon, \{C. T.\}",
year = "2012",
doi = "10.4028/www.scientific.net/SSP.186.74",
language = "English",
isbn = "9783037853818",
series = "Solid State Phenomena",
publisher = "Trans Tech Publications Ltd.",
pages = "74--77",
editor = "Danuta Str{\'o}{\.z} and Krystian Prusik",
booktitle = "Electron Microscopy XIV",
address = "Switzerland",
note = "14th International Conference on Electron Microscopy (EM2011) ; Conference date: 26-06-2011 Through 30-06-2011",
}