期刊
JOURNAL OF CRYSTAL GROWTH
卷 300, 期 1, 页码 127-129出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2006.11.004
关键词
crystal structure; molecular beam epitaxy; nitrides; semiconducting aluminum compounds
A new AlN polytype is grown on M-plane 6H-SiC by plasma-assisted molecular beam epitaxy. A 6H stacking order is deduced from reflection high-energy electron diffraction patterns and the occurrence of an additional [1 1 6 0](6H) reflection in X-ray diffraction omega-20 scans. A predominant 6H stacking, intersected by thin lamellae with 2H stacking, is directly observed in high-resolution transmission electron microscopy. Atomic force microscopy (AFM) shows a stripe-like morphology with a roughness of 1.7 nm and a peak-to-valley distance of 12 nm over 25 m(2). The AlN films are partially relaxed and of good crystal quality as evidenced from X-ray diffraction omega-scans with a line width of 130 arcsec for both symmetric and asymmetric reflections. (c) 2006 Elsevier B.V. All rights reserved.
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