Optical Properties of Bismuth Tri-Iodide Single Crystals. I : Interband Transitions
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概要
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The reflection spectra of BiI_s single crystals were measured between 1.5 and 5.5 eV at 6, 77 and 286 K. A Kramers-Kronig dispersion analysis of the data was made, and the intrinsic absorption coefficient and the real and imaginary parts of the dielectric constants were calculated. The large peak at 2.0 eV is ascribed to direct excitonic transition near the fundamental absorption edge. The main features observed in the absorption spectra are discussed in terms of two proposed models for anionic and cationic excitons in heavy metal halides. Measurements have also been made on the ordinary refractive index near the absorption edge. The data are well described by a two-oscillator model.
- 社団法人日本物理学会の論文
- 1976-04-15
著者
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KOMATSU Teruo
Department of Physics, Osaka City University
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Komatsu Teruo
Department Of Physics Faculty Of Science Osaka City University
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KAIFU Yozo
Department of Physics, Faculty of Science, Osaka University
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Kaifu Yozo
Department Of Applied Physics Osaka City University
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