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首页> 外文期刊>Journal of Crystal Growth >Growth of CdS/ZnS strained laeyr superlattices on GaAs(0 0 1) by molecular-beam epitaxy with special reference to their strucutral properties and lattice dynamics
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Growth of CdS/ZnS strained laeyr superlattices on GaAs(0 0 1) by molecular-beam epitaxy with special reference to their strucutral properties and lattice dynamics

机译：分子束外延法在GaAs（0 0 1）上生长CdS / ZnS应变Laeyr超晶格，特别是考虑其结构特性和晶格动力学

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摘要

Strained laeyr CdS/ZnS superlattices have been grwon on GaAs(0 0 1) by moleculr-beam epitaxy using CdS and ZnS compound sources. The samples were investigated wiht special reference to their structural properties and lattice dynamics by means of X-ray diffraction and Raman spectroscopy. Thue result sof four superlattices iwht differnet period lenght are discussed in detail. X-ray dfifraciton profles show superlattice satellite peaks up to the fourth order indicating a hgih degree of periodicity. The lateral and in-depth homogeneity of the period lenght is also confirmed by Raman investigations. Folded longitudinal acoustic phonons in CdS/ZnS superlattices were observed for the fist time. The experimentla vlauesawgree very well wih theoretical calculatins basedon the Rytov modle and show the expected dependency on the superlattice period. The behaviour of the optical phonons is mainly determined by strain induced shifts caused bythe hgih lawttice misatchu (-7/100) for this sysem. A good agreement between theoretical predicitons and detected frequencies is obtained.
机译：使用CdS和ZnS化合物源通过分子束外延在GaAs（0 0 1）上生长了应变Layr CdS / ZnS超晶格。通过X射线衍射和拉曼光谱对样品进行了特别参考，以研究其结构性质和晶格动力学。详细讨论了四个不同周期的超晶格的结果。 X射线衍射谱图显示超晶格卫星峰，最高达到四阶，表明其周期性。拉曼研究也证实了周期长度的横向和深度均匀性。在第一时间观察到CdS / ZnS超晶格中折叠的纵向声子。基于Rytov模的理论计算结果与实验非常吻合，并显示出预期对超晶格周期的依赖性。光学声子的行为主要由该系统的hghh lawttice misatchu（-7/100）引起的应变引起的位移决定。理论上的预测与检测到的频率之间取得了良好的一致性。

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