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Self Assembled PbSe Quantum Dots with Almost Equal Sizes Grown by MBE on PbTe/Si(111)

机译:通过MBE在PBTE / Si上产生几乎相等尺寸的自组装PBSE量子点(111)

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We report on PbSe QDs grown on a few mum thick PbTe(111) layers on Si(111).The QDs form as pyramids with three (100) side faces and (111) base.Their sizes are almost equal,the standard deviation of their heights can be as low as 2-3%.This seems to be the narrowest distribution ever observed for self assembled QDs.Similar QDs of PbSe have first been described by Pinczolits et al.(Appl.Phys.Lett.73,250,1998).These authors used cleaved BaF_2 as a substrate,they observed two types of dots with somewhat wider size distributions.The results are compared and explained on the basis of nucleation and growth theories.
机译:我们报告在SI(111)上几毫米厚的PBTE(111)层上生长的PBSE QD。QDS形式作为金字塔,具有三(100)侧面和(111)底座。该尺寸几乎相等,标准偏差它们的高度可以低至2-3%。这似乎是为自组装的QDS观察到的最窄分布。Pinczolits等人首次描述了Pinclits的PBSE QDS。(appl.phys.lett.73,250,1998)这些作者使用切割的BAF_2作为基板,它们观察到两种类型的点具有稍宽的尺寸分布。结果是基于成核和生长理论的基础比较和解释。

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