Determination of the band offset in semimagnetic CdTe/Cd1−xMnxTe quantum wells: A comparison of two methods
Determination of the band offset in semimagnetic CdTe/Cd1−xMnxTe quantum wells: A comparison of two methods
复制标题
半磁性 CdTe/Cd1−xMnxTe 量子阱中能带偏移的确定：两种方法的比较
DOI：
10.1063/1.356545
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发表时间：
1994
影响因子：
3.2
通讯作者：
G. Landwehr
中科院分区：
文献类型：
--
作者：
B. Kuhn;W. Ossau;T. Litz;A. Waag;G. Landwehr
为了确定CdTe/Cd1−xMnxTe量子阱中的价带偏移，我们提出了两种不同光谱技术的比较研究。重空穴和轻空穴激子之间的能差作为重空穴跃迁能的函数被认为是确定价带势高度的敏感工具。在本研究中，我们将该技术应用于CdTe/Cd1−xMnxTe量子阱。确定了Qv=0.30附近的价带偏移，发现在整个范围内（直到x=0.27）所研究的Mn含量都有效。在半磁量子阱中，外磁场电位高度的调谐为评估价带偏移提供了可能。该技术已广泛应用于CdTe/Cd1−xMnxTe，但尚未达成共识。我们分析了不同Mn含量的CdTe/Cd1−xMnxTe量子阱中重空穴激子的塞曼分裂。利用价带偏移作为一个可调参数，一个小的…
We present a comparative study of two different spectroscopic techniques in order to determine the valence band offset in CdTe/Cd1−xMnxTe quantum wells. The energy difference between heavy‐ and light‐hole excitons as a function of the heavy‐hole transition energy is known as a sensitive tool for the determination of the valence band potential height. In the present study we have employed this technique to CdTe/Cd1−xMnxTe quantum wells. A valence band offset around Qv=0.30 is determined, which is found to be valid in the whole range of investigated Mn contents up to x=0.27. In semimagnetic quantum wells the tuning of potential heights in external magnetic fields offers the possibility to evaluate the valence band offset. This technique has been widely employed to CdTe/Cd1−xMnxTe, but no consensus has been reached yet. We have analyzed the Zeeman splitting of the heavy‐hole exciton in CdTe/Cd1−xMnxTe quantum wells with different Mn contents. Using the valence band offset as an adjustable parameter, a smalle...