Surface activity of magnesium during GaN molecular beam epitaxial growth
Conference
·
OSTI ID:20104558
Exposure of wurtzite GaN films grown on Si-polar 6H-SiC(0001) to magnesium during molecular beam epitaxy (MBE) has been studied. In the nitrogen rich regime of MBE growth, GaN films are known to grow with rough morphology. The authors observe on GaN(0001) that small doses of Mg act as a surfactant, smoothing out this roughness. An interpretation of this surfactant behavior is given in terms of electron counting arguments for the surface reconstructions. Previously, the authors have reported that larger doses of Mg lead to inversion of the Ga-polar GaN film to produce N-polar GaN. Several Mg-related reconstructions of the resulting GaN(000{bar 1}) surface are reported.
- Research Organization:
- Carnegie Mellon Univ., Pittsburgh, PA (US)
- Sponsoring Organization:
- Office of Naval Research; National Science Foundation
- OSTI ID:
- 20104558
- Country of Publication:
- United States
- Language:
- English
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