Magneto-optic study of the interface in semimagnetic semiconductor heterostructures: Intrinsic effect and interface profile in CdTe-Cd1-xMnxTe.
Magneto-optic study of the interface in semimagnetic semiconductor heterostructures: Intrinsic effect and interface profile in CdTe-Cd1-xMnxTe.
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半磁性半导体异质结构中界面的磁光研究：CdTe-Cd1-xMnxTe 中的本征效应和界面轮廓。
DOI：
10.1103/physrevb.53.4891
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Gaj
中科院分区：
文献类型：
--
作者：
Grieshaber;Haury;Cibert;d'Aubigné;Wasiela;Gaj
本文描述了半磁半导体（Cd 1− x Mn x Te）和碲化镉（CdTe）之间的界面，并通过异质结构中载流子的塞曼分裂来研究其磁和磁光性质。该模型（先前提出的唯象基础上）考虑到不完美的接口和增强的磁性，由于在接口处的磁性邻居的数量减少的化学配置文件。我们首先通过考虑界面处或嵌入CdTe中的单个Cd 1− x Mn x Te单层中的Mn团簇的统计来证明模型（对于低Mn含量）。我们还表明，塞曼效应的灵敏度的存在下，在界面处的二维岛屿迅速降低，岛的宽度增加，即，措施是敏感的孤立的磁性离子的存在下，而不是（或更少）的粗糙度，它的特点是界面上的原子间距离的规模。然后，我们将此工具应用于具有不同标称特性和不同生长条件的广泛系列样品。
This paper is devoted to the description of the interface between a semimagnetic semiconductor (Cd 1− x Mn x Te) and a nonmagnetic one (CdTe), and to the study of its magnetic and magneto-optical properties, as revealed through the enhanced Zeeman splitting of carriers confined in heterostructures. The model (proposed earlier on phenomenological bases) takes into account both the chemical profile of the imperfect interface and the enhanced magnetism due to the reduced number of magnetic neighbors at the interface. We first justify the model (for low Mn contents) by considering the statistics of Mn clusters at the interface or in a single Cd 1− x Mn x Te monolayer embedded in CdTe. We also show that the sensitivity of the Zeeman effect to the presence of two-dimensional islands at the interface rapidly decreases as the island width increases; ie, the measure is sensitive to the presence of isolated magnetic ions and not (or less) to roughness, and it characterizes the interface on the scale of interatomic distance. Then we apply this tool to a wide series of samples with different nominal characteristics and different growth conditions.