Evolution of Ge and SiGe Quantum Dots under Excimer Laser Annealing
Evolution of Ge and SiGe Quantum Dots under Excimer Laser Annealing
复制标题
准分子激光退火下 Ge 和 SiGe 量子点的演化
DOI:
10.1088/0256-307x/25/1/066
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发表时间:
2008
影响因子:
3.5
通讯作者:
中科院分区:
文献类型:
--
作者:
We present different relaxation mechanisms of Ge and SiGe quantum dots under excimer laser annealing. Investigation 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 Si0.77Ge0.23 film 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 Wickham's theory, and also demonstrate that no bulk diffusion occurs during the excimer laser annealing.
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