Abstract

Results of the characterization and numerical analysis of InAsSbP composition strain-induced micro- and nanostructures shape transition are presented. Nucleation is performed from In-As-Sb-P quaternary composition liquid phase in Stranski–Krastanow growth mode. Geometric features and the shape transformation chronology of truncated pyramidal islands, lens-shape and pyramidal quantum dots (QDs) are under consideration, which opens up new possibilities at nanoscale engineering and nanoarchitecture of several types of nanostructures. High-resolution scanning electron (HR-SEM) and transmission electron (TEM) microscopes are used for micro- and nanostructures characterization. We show that as the islands volume decreases, the following succession of shape transitions are detected: truncated pyramid, {111} facetted pyramid, {111} and partially {105} facetted pyramid, completely unfacetted ‘pre-pyramid’, which gradually evolve to hemisphere and then again to pyramidal QD but with higher facet indexes. Critical sizes of islands shape transformation from ‘pre-pyramid’ to hemisphere (500–550 nm) and then from lens-shape again to pyramidal QDs (5–7 nm) are experimentally detected and theoretically evaluated. It is shown that theoretically calculated values coincide with experimentally obtained data.

中文翻译：

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液相成核时 InAsSbP 组成微纳米结构形状转变的几何特征和数值分析

摘要

介绍了 InAsSbP 成分应变诱导的微米和纳米结构形状转变的表征和数值分析结果。成核是在 Stranski-Krastanow 生长模式下从 In-As-Sb-P 四元组成液相进行的。正在考虑截断金字塔岛、透镜形状和金字塔量子点 (QD) 的几何特征和形状转换年代学，这为纳米工程和几种类型纳米结构的纳米结构开辟了新的可能性。高分辨率扫描电子 (HR-SEM) 和透射电子 (TEM) 显微镜用于表征微米和纳米结构。我们表明，随着岛屿体积的减少，检测到以下连续的形状转换：截棱锥、{111} 多面棱锥、{111} 和部分 {105} 刻面金字塔，完全未刻面的“前金字塔”，逐渐演变为半球，然后再次演变为金字塔形 QD，但具有更高的刻面指数。从“前金字塔”到半球（500-550 nm），然后从透镜形状再到金字塔形量子点（5-7 nm）的岛形转变的临界尺寸通过实验检测和理论评估。结果表明，理论计算值与实验获得的数据一致。