标题: | Strain relaxation and induced defects in InAsSb self-assembled quantum dots |
作者: | Chen, J. F. Hsiao, R. S. Huang, W. D. Wu, Y. H. Chang, L. Wang, J. S. Chi, J. Y. 材料科学与工程学系 电子物理学系 Department of Materials Science and Engineering Department of Electrophysics |
公开日期: | 5-六月-2006 |
摘要: | The onset of strain relaxation and induced defects in InAs0.94Sb0.06 quantum dots are investigated. We show that the relaxation causes partial carrier depletion in the dots and drastic carrier depletion in the top GaAs layer due to the introduction of two defect traps At 0.35 and 0.64 eV. This result is consistent with transmission electron microscopy data which show misfit dislocations on the edges of the dot upper boundary and threading dislocations in the top GaAs layer. The bottom GaAs layer is dislocation-free, and thus the strain relaxation may initially occur on the edges of the dots. (c) 2006 American Institute of Physics. |
URI: | http://dx.doi.org/10.1063/1.2212064 http://hdl.handle.net/11536/12162 |
ISSN: | 0003-6951 |
DOI: | 10.1063/1.2212064 |
期刊: | APPLIED PHYSICS LETTERS |
Volume: | 88 |
Issue: | 23 |
结束页: | |
显示于类别: | Articles |
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