【摘 要】
:
We present different relaxation mechanisms of Ge and SiGe quantum dots under excimer laser annealing.Inyestigation of the coarsening and relaxation of the dots
【机 构】
:
State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sc
论文部分内容阅读
We present different relaxation mechanisms of Ge and SiGe quantum dots under excimer laser annealing.Inyestigation of the coarsening and relaxation of the dots showS that the strain in Ge dots on Ge films is relaxed by dislocation since there is no interface between the Ge dots and the Ge layer,while the SiGe dots on Si0.77 Ge0.23film relax by lattice distortion to coherent dots which results from the obvious interface between the SiGe dots and the Si0.77Ge0.23 film.The results are suggested and sustained by Vanderbilt and Wickhams theory,and also demonstrate that no bulk diffusion Occurs during the excimer laser annealing.
其他文献
按照时间和薪酬推算,医生在医院一待就是大半辈子,照顾家人、陪孩子的时间都少之又少,有的收入甚至养家都较为困难,过去异常火热的医学专业似乎遇冷。在年轻人眼里,从医还算是一个好的职业选择吗? 佛语有云:“救人一命胜造七级浮屠。”很多医学生是怀着对职业的神圣向往选择医学,但经过多年苦读走入社会后才发现,现实中的一些医院奉行市场化理念,以盈利最大化为追求,医生的待遇往往与营业额紧密相联,过度检查、过度医
The cross sections of the ls electron photoionization and corresponding shake-up processes for Li atoms in the ground state 1s22s and excited states 1s22p, 1s23
Dynamics in coupled Duffing oscillators with two coexisting symmetrical attractors is investigated. For a pair of Dutffng oscillators coupled linearly, the tran
小学生心理健康教育是学校教育的重要组成部分,也是实现素质教育的重要途径。没有心理健康就没有素质教育的成功。在素质教育总体结构中,心理健康教育属于奠基性工程。迎着新课改的春风,我们也应该给予学生更多的探讨空间,帮助学生发现各种心理问题,并自己尝试解决。三国时期孙权曾说:“能用众力,则无敌于天下矣;能用众智,则无畏于圣人矣。”那么,合作探究策略在小学心理健康教育中又该如何运用呢? 一、 创设合作探究
Perovskite-type LaFe1-x Cux O3 (x=0.10, 0.14, 0.18) solid solution is prepared with the conventional solid-state reaction technique.The electrical resistivity a
In the framework of a chiral constituent quark model, considering the contributions of π annihilation and one-gluon annihilation, the proton-antiproton s-wave
Density functional theory (DFT) with local density approximation (LDA) is employed to study the structural and electronic properties of the high explosive octah
摘 要:现代教育信息技术是新生事物,它随着社会发展及科技水平提升发生转变,且与现代教育改革紧密相关。科学运用现代教育信息技术,不仅让学生具备基本的信息技术与能力,也能较好地促进其他学科知识的学习,全面提升教学质量与学生素养。因此,提升高中信息技术课堂教学效率,具有非常重要的现实意义。 关键词:高中教学 信息技术 有效课堂 新课程改革促进了课堂教学手段的改进,信息技术作为一门崭新的学科,对学生具
Blue sapphires are treated with Be in oxidizing atmosphere to change the blue colour into yellow. Untreated and Be-treated samples are examined using laser abla
摘 要:基于杜威“儿童冲动观”的作文评语系统构建,是整个作文教育系统构建的子命题。对此,作者先行解讀“杜威儿童冲动观”,然后将其引入,用以观照中学作文教学。落点设在“作文评语”系统的构建上。阐述了作文评语系统构建的基本理论元素,厘清了要素间的逻辑关系。 关键词:儿童冲动观 教师评语 学生评语 一、杜威“儿童冲动观”及其解读 杜威言:“学校即社会,教育即成长。”教育的使命,在于服务儿童的成长。