Magneto-optical studies of excitons in Zn1-xCdxSe/ZnSe quantum wells.
Magneto-optical studies of excitons in Zn1-xCdxSe/ZnSe quantum wells.
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Zn1-xCdxSe/ZnSe 量子阱中激子的磁光研究。
DOI：
10.1103/physrevb.54.4974
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Zimmermann
中科院分区：
文献类型：
--
作者：
Puls;Rossin;Henneberger;Zimmermann
利用分子束外延生长的高质量 Zn x Cd 1− x Se/ZnSe 多量子阱的磁吸收来系统地研究主要激子特性。激子线的小不均匀宽度使我们能够观察由较高重空穴激子跃迁产生的朗道能级，并详细分析基态的自旋分裂和抗磁位移。对磁激子的薛定谔方程进行数值求解，以描述其磁场行为，并根据井中 Cd 含量推导相关的激子和能带参数。较高朗道能级的反交叉特征和光空穴激子基态能量的磁场依赖性意味着由于重光空穴耦合而产生的复杂价带结构。© 1996 美国物理学会。
Magnetoabsorption on high-quality Zn x Cd 1− x Se/ZnSe multiple quantum wells grown by molecular-beam epitaxy is used to study systematically the major excitonic properties. The small inhomogeneous width of the exciton lines allows us to observe Landau levels arising from higher heavy-hole exciton transitions as well as to analyze in detail the spin splitting and diamagnetic shift of the ground state. The Schrödinger equation of magnetoexcitons is solved numerically to describe their magnetic-field behavior and to deduce the relevant excitonic and band parameters in dependence on the Cd content in the well. Anticrossing features at higher Landau levels and the magnetic-field dependence of the light-hole exciton ground-state energy signify a complex valence-band structure due to heavy-light hole coupling.© 1996 The American Physical Society.