Large size self-assembled quantum rings: quantum size effect and modulation on the surface diffusion

	Large size self-assembled quantum rings: quantum size effect and modulation on the surface diffusion
	Tong C. Z.; Yoon S. F.; Wang L. J.
	2012
发表期刊	Nanoscale Research Letters
ISSN	1931-7573
卷号	7
摘要	We demonstrate experimentally the submicron size self-assembled (SA) GaAs quantum rings (QRs) by quantum size effect (QSE). An ultrathin In-0.1 Ga0.9As layer with different thickness is deposited on the GaAs to modulate the surface nucleus diffusion barrier, and then the SA QRs are grown. It is found that the density of QRs is affected significantly by the thickness of inserted In-0.1 Ga0.9As, and the diffusion barrier modulation reflects mainly on the first five monolayer . The physical mechanism behind is discussed. The further analysis shows that about 160 meV decrease in diffusion barrier can be achieved, which allows the SA QRs with density of as low as one QR per 6 mu m(2). Finally, the QRs with diameters of 438 nm and outer diameters of 736 nm are fabricated using QSE.
收录类别	SCI ; EI
语种	英语
WOS记录号	BMC:10.1186/1556-276X-7-520
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/34514
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Tong C. Z.,Yoon S. F.,Wang L. J.. Large size self-assembled quantum rings: quantum size effect and modulation on the surface diffusion[J]. Nanoscale Research Letters,2012,7.
APA	Tong C. Z.,Yoon S. F.,&Wang L. J..(2012).Large size self-assembled quantum rings: quantum size effect and modulation on the surface diffusion.Nanoscale Research Letters,7.
MLA	Tong C. Z.,et al."Large size self-assembled quantum rings: quantum size effect and modulation on the surface diffusion".Nanoscale Research Letters 7(2012).