Impact of substrate nitridation on the growth of InN on In2O3(111) by plasma-assisted molecular beam epitaxy

被引:6
作者
Cho, Yongjin [1 ,3 ]
Sadofev, Sergey [1 ]
Fernandez-Garrido, Sergio [1 ]
Calarco, Raffaella [1 ]
Riechert, Henning [1 ]
Qalazka, Zbigniew [2 ]
Uecker, Reinhard [2 ]
Brandt, Oliver [1 ]
机构
[1] Paul Drude Inst Festkorperelekt, Hausvogteipl 5-7, D-10117 Berlin, Germany
[2] Leibniz Inst Kristallzuchtung, Max Born Str 2, D-12489 Berlin, Germany
[3] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
关键词
InN; In2O3; MBE; Nitridation; Polarity; SAPPHIRE NITRIDATION; GAN GROWTH; SINGLE-CRYSTALS; TEMPERATURE; LAYERS; CHEMISTRY; FILMS;
D O I
10.1016/j.apsusc.2016.01.268
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We study the growth of InN films on In2O3(111) substrates by plasma-assisted molecular beam epitaxy under N excess. InN films deposited directly on In2O3(111) exhibit a strongly faceted morphology. A nitridation step prior to growth is found to convert the In2O3(111) surface to InN{0001}. The morphology of InN films deposited on such nitridated In2O3(111) substrates is characteristic for growth by instable step flow and is thus drastically different from the three-dimensional growth obtained without nitridation. We show that this change originates from the different polarity of the films: while InN films deposited directly on In2O3(111) are In-polar, they are N-polar when grown on the nitridated substrate. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:159 / 162
页数:4
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