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《Chinese Journal of Semiconductors》 2005-12
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Influences of Differently Shaped Quantum Dots on Elastic Strain Field Distributions

Liu Yumin 1,2,,Yu Zhongyuan 1,2,Yang Hongbo 1,2,and Huang Yongzhen3(1 School of Science,Beijing University of Posts & Telecommunications,Beijing 100876,China) (2 Key Laboratory of Ministry of Education for Optical Communication and Lightwave Technologies,Beijing 100876,China) (3 State Key Laboratory of Integrated Optoelectronics,Institute of Semiconductors, Chinese Academy of Sciences,Beijing 100083,China)  
Adopting the two-dimensional axis-symmetrical model,a systematic analysis of the elastic strain distribution of geometrically differently shaped quantum dots is conducted using the finite element method.The detailed results for the elastic strain distribution of lens,cylinder,pyramid,and cone-shaped quantum dots are given.These show that the shape of the quantum dot has obvious influences on both the normal and shear strain distributions,while not affecting the hydrostatic strain distributions.The hydrostatic strain distribution is almost the same in both the center axis and circumjacent path.The shear strain distributions are focused on the circumjacent path,and the extremas are located in the inflexion of the circumjacent path,while the other parts of the quantum dot,including the path along the center axis,have no shear strain.
【Fund】: 国家重点基础研究发展计划(批准号:2003CB314901);; 国家高技术研究发展计划(批准号:2003AA311070);; 集成光电子学国家重点联合实验室开放课题资助项目~~
【CateGory Index】: O471.1
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【Secondary References】
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1 WANG Song-bai(College of Physics and Informational Engineering,Fuzhou University,Fujian Fuzhou 350002 PRC);The Energy Band Structure of Round and Rectangle Sectional Quantum Wires in Low Dimensional Semiconductor GaAs[J];Jiangxi Science;2009-04
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