Optical properties of PbTe:Mn

In this paper, we investigate Mn concentration and crystal growth rate influence on optical properties of PbTe:Mn single crystals. We measured far-infrared reflectivity spectra at room temperature in the 10–250 cm −1 spectral range. The analysis of the far-infrared spectra was made by a fitting proc...

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Bibliographic Details
Published in:Journal of alloys and compounds 2004-02, Vol.365 (1), p.89-93
Main Authors: Trajić, J., Romčević, M., Romčević, N., Nikolić, S., Golubović, A., Durić, S., Nikiforov, V.N.
Format: Article
Language:English
Subjects:
Crystal growth
Light absorption and reflection
Seimiconductors
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Summary:In this paper, we investigate Mn concentration and crystal growth rate influence on optical properties of PbTe:Mn single crystals. We measured far-infrared reflectivity spectra at room temperature in the 10–250 cm −1 spectral range. The analysis of the far-infrared spectra was made by a fitting procedure based on the model of coupled oscillators. In spite of the strong plasmon-LO phonon interaction, we found that the plasma frequency decreases as Mn concentration increases, while the crystal growth rate has the opposite effect. Also, we obtained the Mn impurity in-band mode at about 50 cm −1.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(03)00676-5