Direct Observation of an Ordered Phase in ($11\bar{2}0$) Plane InGaN Alloy

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概要

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• A polar-dependent phase with spontaneous atomic ordering is found in a nonpolar ($11\bar{2}0$) plane In0.08Ga0.92N film grown by metalorganic vapor-phase epitaxy. An atomic arrangement is a periodic sequence of group-III sublattices, such as In0.04Ga0.96N/In0.12Ga0.88N, that is only observed in a nitrogen polar region through systematic transmission electron microscopy investigation. Cathodoluminescence (CL) in the nitrogen polar region, i.e., spontaneously ordered atomic structure of InGaN, reveals anomalous emission behavior, specifically an S-shape-like (increase–decrease) temperature dependence of CL peak energy. It is suggested that the spontaneous ordered atomic structure of InGaN plays the role of a localized center owing to band gap shrinkage, which has been reported in other III–V alloy systems.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2008-12-25

著者

• Hashimoto Iwao

  Department Of Industrial Chemistry Wakayama National College Of Technology

• Ando Shizutoshi

  Department Of Applied Physics Faculty Of Science Science University Of Tokyo

• Kusakabe Kazuhide

  Department Of Applied Physics Faculty Of Science Tokyo University Of Science

• Kuramochi Koji

  Department Of Physics Tokyo University Of Science

• Ohkawa Kazuhiro

  Department Of Applied Physics Faculty Of Science Tokyo University Of Science

• Yamazaki Takashi

  Department Of Applied Chemistry Graduate School Of Engineering Tokyo University Of Agriculture And T

• Ando Shizutoshi

  Department of Electrical Engineering, Tokyo University of Science, 1-14-6 Kudan-kita, Chiyoda, Tokyo 102-0073, Japan

• Furuzuki Tokuma

  Department of Applied Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan

• Kuramochi Koji

  Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan

• Yamazaki Takashi

  Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan

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