Morphological transformation of InyGa1-yAs islands, fabricated by Stranski-Krastanov growth

被引:49
作者
Lorke, A
Blossey, R
Garcia, JM
Bichler, M
Abstreiter, G
机构
[1] Gerhard Mercator Univ, Festkorperphys Lab, D-47048 Duisburg, Germany
[2] Univ Essen Gesamthsch, Fachbereich Phys, D-45117 Essen, Germany
[3] Inst Microelect, E-28760 Madrid, Spain
[4] Tech Univ Munich, Walter Schottky Inst, D-85747 Garching, Germany
来源
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2002年 / 88卷 / 2-3期
关键词
dots; rings; Stranski-Krastanov; self-organized; island; transformation;
D O I
10.1016/S0921-5107(01)00870-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A remarkable change in topology occurs when InyGa1-yAs quantum dots, grown by Stranski-Krastanov self-organization, are covered by a thin layer of GaAs. The nano-islands rearrange themselves to form volcano-like islands with distinct, ring-like features. The island topology can be preserved during overgrowth and thus used for the fabrication of ring-shaped quantum structures. The experimental data suggests that two mechanisms, diffusion and dewetting, are driving the transformation from dots to rings. (C) 22002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:225 / 229
页数:5
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