Polaron cyclotron resonance in II–VI compounds at high magnetic fields
Polaron cyclotron resonance in II–VI compounds at high magnetic fields
复制标题
高磁场下 II-VI 化合物中的极化子回旋共振
DOI：
10.1002/pssb.200301781
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Y. Imanaka
中科院分区：
文献类型：
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作者：
N. Miura;Y. Imanaka
本文讨论了II-VI族化合物在强磁场中的回旋共振，特别是CdS中的回旋共振，在强磁场中观察到许多不同的异常。高磁场使我们能够观察干净的回旋共振光谱，即使在低迁移率晶体，因此在大多数II-VI族半导体，我们可以研究极化子效应高达高能量范围远高于LO声子能量。共振极化子效应被显著观察到，我们可以从反交叉效应的大小来估计电子-声子耦合强度。除了共振极化子相互作用之外，还发现回旋有效质量显示出特殊的温度依赖性，这在理论上可以通过电子-声子相互作用和杂质散射的组合来解释。
In this paper, we discuss the cyclotron resonance in II–VI compounds in very high magnetic fields, in particular, those in CdS where many different anomalies were observed in high magnetic fields. High magnetic fields enable us to observe clean cyclotron resonance spectra even in low mobility crystals, thus in most II–VI semiconductors we can study the polaron effect up to the high energy range well above the LO phonon energy. Resonant polaron effect is observed prominently and we can estimate the electron–phonon coupling strength from the magnitude of the anticrossing effect. In addition to the resonant polaron interaction, it was found that cyclotron effective mass shows a peculiar temperature dependence which is explained theoretically by the combination of the electron‐phonon interaction and the impurity scattering.