High-quality GaN on AlN multiple intermediate layer with migration enhanced epitaxy by rf-molecular beam epitaxy

被引:15
|
作者
Sugihara, D [1 ]
Kikuchi, A [1 ]
Kusakabe, K [1 ]
Nakamura, S [1 ]
Toyoura, Y [1 ]
Yamada, T [1 ]
Kishino, K [1 ]
机构
[1] Sophia Univ, Dept Elect & Elect Engn, Chiyoda Ku, Tokyo 1028554, Japan
来源
关键词
GaN; AIN; migration enhanced epitaxy; rf-molecular beam epitaxy; AIN multiple intermediate layer;
D O I
10.1143/JJAP.39.L197
中图分类号
O59 [应用物理学];
学科分类号
摘要
High-speed GaN growth of 1.0 mu m/h with migration enhanced epitaxy (MEE) by molecular beam epitaxy using rf-plasma nitrogen (RF-MBE) was demonstrated. The electron mobility of MEE-GaN was 362 cm(2)/V.s for the electron density of 1.7 x 10(17) cm(-3) at room temperature. The threading dislocation density of MEE-GaN was estimated to be 1.0-3.0 x 10(10) cm(-2) based on the cross-sectional transmission electron microscope (TEM) image. The remarkable improvement of electrical properties was obtained by the introduction of a high-temperature (750 degrees C) grown AIN/GaN multiple intermediate layer (AIN-MIL). The cross-sectional TEM image showed that threading dislocations were bent or terminated at the AIN-MIL. The highest room temperature mobility of 668 cm(2)/V.s was obtained at the electron density of 9.5 x 10(16) cm(-3). The low-temperature peak mobility was 2340 cm(2)/V.s at 90 K.
引用
收藏
页码:L197 / L199
页数:3
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