Characterization of GaN layers grown on metallic TiN buffer layers

Sangjin Lee, Kazuhiro Ito, Yu Uchida, Susumu Tsukimoto, Yuhei Ikemoto, Koji Hirata, Masanori Murakami

    研究成果: Conference contribution


    The epitaxial, continuous, flat GaN layers were recently found to be grown on the metallic TiN buffer layers. In the present experiment, the GaN layers grown on TiN were characterized using the X-ray diffraction method and transmission electron microscope and the results were compared with those grown on the AlN buffer layer. The TiN and GaN layers exhibited [111] and [0001] fiber textures, respectively. The GaN layers provided large half-value widths of the X-ray diffraction peaks of both the (0002) and {101̄0} planes compared with those of the GaN layers grown on AlN. This may be explained by a large lattice mismatch between GaN and TiN of about 6.2% compared with that between GaN and AlN. The GaN layers grown on TiN provided a low density of domains with opposite lattice polarity and horizontal dislocations (108 -109 cm-2). Although a density of the horizontal dislocations was similar to that of the threading dislocations in the GaN layers grown on AlN, the GaN layers grown on TiN produced a significant reduction of threading dislocation density compared with the GaN layers grown on AlN. This suggests that the direct growth of GaN on TiN would become the technique to reduce the threading dislocation density in the GaN layers.

    ホスト出版物のタイトルGeneral Abstracts
    ホスト出版物のサブタイトルElectronic, Magnetic, and Photonic Materials Division 2007 - Proceedings of Symposium held during the 2007 TMS Annual Meeting
    出版ステータスPublished - 2007 12月 1
    イベント136th TMS Annual Meeting, 2007 - Orlando, FL, United States
    継続期間: 2007 2月 252007 3月 1


    名前TMS Annual Meeting


    Other136th TMS Annual Meeting, 2007
    国/地域United States
    CityOrlando, FL

    ASJC Scopus subject areas

    • 凝縮系物理学
    • 材料力学
    • 金属および合金


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