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首页> 外文期刊>Physical review. B, Condensed Matter And Materals Physics >Asymmetric correlation function describing the positional ordering of liquid-phase-epitaxy Si-Ge nanoscale islands
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Asymmetric correlation function describing the positional ordering of liquid-phase-epitaxy Si-Ge nanoscale islands

机译：非对称相关函数描述液相外延Si-Ge纳米岛的位置排序

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摘要

Liquid-phase-epitaxy grown SiGe nanoscale islands on (001)Si form extended chains which are aligned along the < 100 > directions. The positional ordering within the island chains was studied by x-ray diffuse scattering. The results can be interpreted by a short-range order model. The corresponding correlation function exhibits an asymmetric peak profile. The asymmetry leads to nonequidistantly spaced satellite peaks that disperse outward slightly with increasing lateral momentum transfer. The observed asymmetric island-island correlation is caused by the successive growth of the islands within a chain, while the new island position is influenced by depletion of the wetting layer around the island.
机译：（001）Si上液相外延生长的SiGe纳米级岛形成沿<100>方向排列的延伸链。通过X射线漫射散射研究了岛链内的位置顺序。结果可以由短程订单模型解释。相应的相关函数显示出不对称的峰轮廓。不对称会导致间隔不等距的卫星峰，随着横向动量传递的增加，卫星峰会稍微向外散开。观察到的岛与岛之间的不对称相关性是由岛在链中的连续增长引起的，而新岛的位置则受岛周围湿润层耗竭的影响。

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