首页> 外文期刊>Journal of Crystal Growth >Experimental evidence for critical 2D nuclei in the 2D/3D growth mode transition of compressive and tensile strained InGaAs on InP(001)
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Experimental evidence for critical 2D nuclei in the 2D/3D growth mode transition of compressive and tensile strained InGaAs on InP(001)

机译:在InP(001)上压缩和拉伸应变的InGaAs的2D / 3D生长模式转变中的关键2D核的实验证据

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We have investigated the 2D/3D growth mode transition of 2% compressive and tensile strained InGaAs on InP(001) using scanning tunneling microscopy measurements. We have focussed on the shapes, the heights and the widths of the 2D platelets during the 2D growth preceding the transition. The "Parallelepiped"-like shape is characteristic of compressive 2D platelets while the "in-stage pyramid"-like shape characterizes the tensile ones. The size evolution (width and height) of both 2D platelet types suggests that a critical value for 3D growth onset is the height H of the 2D platelets. We show however that the H quantity, taking into account not only the platelet height H but also the number n of steps which are present in the 2D platelet edge, is a more pertinent roughness parameter to predict the 3D growth mode onset.
机译:我们已经使用扫描隧道显微镜测量研究了InP(001)上2%压缩和拉伸应变的InGaAs的2D / 3D生长模式转变。我们专注于过渡之前2D生长期间2D血小板的形状,高度和宽度。 “平行四面体”状是2D压缩血小板的特征,而“阶段金字塔”状是拉伸性血小板的特征。两种2D血小板类型的大小演变(宽度和高度)表明,3D生长开始的关键值是2D血小板的高度H。然而,我们表明,不仅考虑血小板高度H,而且考虑到2D血小板边缘中存在的台阶数n,H / n量是预测3D生长模式发作的更相关的粗糙度参数。

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