Magneto-optical study of interwell coupling in double quantum wells using diluted magnetic semiconductors.
Magneto-optical study of interwell coupling in double quantum wells using diluted magnetic semiconductors.
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使用稀释磁性半导体对双量子阱中的井间耦合进行磁光研究。
DOI：
10.1103/physrevb.54.16939
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Ram
中科院分区：
文献类型：
--
作者：
Lee;Dobrowolska;Furdyna;Luo;Ram
采用Zn 1−x Mn x Se稀释磁性半导体（DMS）势垒对ZnSe/Zn 1−y Cd y Se双量子阱进行了磁光实验。样品由45个-Å非磁性量子阱组成，井间DMS势垒的厚度不同（10,35和100 Å）。观察到带间基态跃迁和激发态跃迁。当施加磁场时，导层和价带中的磁势垒高度发生塞曼位移，导致井间耦合发生重大变化。这些变化是通过检查跃迁的能量、它们的塞曼分裂和它们的强度来研究的。进一步研究了这些效应与温度和势垒宽度的关系。在涉及超薄磁垒的情况下观察到的行为被发现是异常的，并根据降维对薄DMS层磁性能的影响进行了讨论。©1996美国物理学会。
Magneto-optical experiments were carried out on a series of ZnSe/Zn 1− y Cd y Se double quantum wells coupled by Zn 1− x Mn x Se diluted magnetic semiconductor (DMS) barriers. The samples consisted of 45-Å nonmagnetic quantum wells with interwell DMS barriers of different thicknesses (10, 35, and 100 Å). The interband ground-state transition, as well as interband transitions between excited states, were observed. As the magnetic field is applied, the heights of the magnetic barriers in the conduction and in the valence band undergo Zeeman shifts, causing major changes in the interwell coupling. Such changes were studied by examining the energies of the transitions, their Zeeman splittings, and their intensities. The dependence of these effects was further studied as a function of temperature and barrier width. The behavior observed in those cases involving ultrathin magnetic barriers was found to be anomalous, and is discussed in terms of effects of reduced dimensionality on the magnetic properties of thin DMS layers.© 1996 The American Physical Society.