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首页> 外文期刊>Physica status solidi, B. Basic research >Three-dimensional quantum dot 'crystal' formation in CdTe/ZnTe superlattices
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Three-dimensional quantum dot 'crystal' formation in CdTe/ZnTe superlattices

机译：CdTe / ZnTe超晶格中的三维量子点“晶体”形成

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摘要

The observation of both vertical and lateral ordering of quantum dots in CdTe/ZnTe superlattices with different thickness of ZnTe spacer is reported. The simultaneous presence of both types of ordering in the studied structures is evidenced by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS) studies. The TEM results show that when the spacer thickness is smaller than 25 monolayers, the islands are vertically correlated along the axis tilted by 40degrees with respect to the growth direction. On the other hand, the SAXS spectra exhibit four intensity maxima of scattering at q = 0.2 Angstrom(-1) along [100], [(1) over bar 00], [010] and [0 (1) over bar0] crystallographic directions. We interpret them as originating from a locally formed square quantum dot lattice. [References: 6]
机译：报道了在不同厚度的ZnTe间隔层的CdTe / ZnTe超晶格中量子点的垂直和横向有序观察。透射电子显微镜（TEM）和小角X射线散射（SAXS）研究证明了两种类型的有序结构同时存在于所研究的结构中。 TEM结果显示，当间隔物的厚度小于25个单层时，这些岛沿着相对于生长方向倾斜40度的轴垂直相关。另一方面，SAXS光谱沿[100]，[（1）在bar 00上]，[010]和[0（1）在bar0]上在q = 0.2埃（-1）处显示四个散射强度最大值。指示。我们将它们解释为源自局部形成的方形量子点晶格。 [参考：6]

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