Abstract
We have investigated the polytype conversion of a GaN film from N-face wurtzite (2H) to zinc-blende (3C) structure due to Mg doping during growth by plasma-assisted molecular-beam epitaxy. Structural analysis by high-resolution transmission electron microscopy and high-resolution x-ray diffraction measurement revealed alignment of the cubic phase with the [111] axis perpendicular to the substrate surface. The optical characteristics of GaN:Mg layers are shown to be very sensitive to the presence of the cubic polytype. For low Mg doping, photoluminescence is dominated by a phonon-replicated donor-acceptor pair at ∼3.25eV, related to the shallow Mg acceptor level, accompanied by a narrow excitonic emission. For high Mg doping, the photoluminescence spectra are also dominated by a line around 3.25eV, but this emission displays the behavior of excitonic luminescence from cubic GaN. A cubic-related donor-acceptor transition at ∼3.16eV is also observed, together with a broad blue band around 2.9eV, previously reported in heavily Mg-doped 3C-GaN(001).
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Dates
Type | When |
---|---|
Created | 20 years, 11 months ago (Sept. 27, 2004, 6:03 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 7, 2024, 7:40 p.m.) |
Indexed | 1 year, 1 month ago (July 6, 2024, 7:12 p.m.) |
Issued | 20 years, 11 months ago (Oct. 1, 2004) |
Published | 20 years, 11 months ago (Oct. 1, 2004) |
Published Print | 20 years, 11 months ago (Oct. 1, 2004) |
@article{Monroy_2004, title={Polytype transition of N-face GaN:Mg from wurtzite to zinc-blende}, volume={96}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1787142}, DOI={10.1063/1.1787142}, number={7}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Monroy, E. and Hermann, M. and Sarigiannidou, E. and Andreev, T. and Holliger, P. and Monnoye, S. and Mank, H. and Daudin, B. and Eickhoff, M.}, year={2004}, month=oct, pages={3709–3715} }