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Cd1-xMnxTe混晶的远红外吸收光谱

沈学础 叶红娟 康荔学 陶凤翔

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Cd1-xMnxTe混晶的远红外吸收光谱

沈学础, 叶红娟, 康荔学, 陶凤翔

FAR INFRARED ABSORPTION OF MIXED CRYSTALS Cd1-x MnxTe

SHEN XUE-CHU, YE HONG-JUAN, KANG LI-XUE, TAO FENG-XIANG
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  • 本文报道4.2—300K和20—400cm-1范围内不同组份的Cd1-xMnxTe混晶远红外声子吸收光谱的研究结果。实验分辨了类CdTe,类MnTe剩余射线带及其TO-LO分裂,首次观察到位于混晶剩余射线吸收区内侧的低频吸收带、低x值情况下的准定域模吸收峰及其两侧的诸双声子吸收带。用缺陷晶格动力学理论估计了准定域模的出现及位置,讨论了其他吸收带的物理起源和判定。
    We report here the results of far infrared absorption on spectra of mixed crystal Cd1-xMnxTe with different compositions x in wavenumber region of 20 to 400cm-1 and temperature region of 4.2 K to 300 K. The CdTe-like, MnTe-like reststrahlen bands and their LO-TO splitting have been resolved. A low frequency absorption band for all the samples and a quasi-local mode absorption peak for the sample with low x value have been found for the first time in the low frequency side of reststrahlen band. In addition, several two-phonon bands have also been observed on both sides of reststrahlen band. The appearence and the position of the quasi-local mode have been estimated with the lattice dynamics of defects. Other absorption bands and their probable origin have also been discussed.
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出版历程
  • 收稿日期:  1984-11-07
  • 刊出日期:  1985-06-05

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