报道了用STEM(扫描透射电子显微镜)对GaIn-AsSb/GaSb异质结的截面不同部分进行分析和研究的初步结果.STEM图像表明,在四元合金GaInAsSb与衬底GaSb的晶格常数不相同时,将会由于晶格的不匹配而产生失配位错和层错,这些缺陷是对应力的一种释放形式,包括60°位错、90°位错和堆垛层错,并且发现只有90°位错才会在外延层表面产生脊.
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