Comparison of Optical Parameters of Ge--As(Sb)--Se(Te) Glassy Films
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概要
- 論文の詳細を見る
We compare optical parameters of Ge2As(Sb)2Se(Te)x ($x = 5, 7$) glassy films. Optical gap obtained from transmission and reflection measurements decreases in the sequence Ge--As--Se $\rightarrow$ Ge--Sb--Se $\rightarrow$ Ge--As--Te $\rightarrow$ Ge--Sb--Te similarly to decreasing glass-forming ability of bulk systems. We have found from spectroscopic ellipsometry measurements that spectral dependence of imaginary part of the dielectric function shifts to lower energies in the same sequence. This indicates to strong correlation between structural arrangement of atoms in these ternaries and their electronic properties. Ge2Sb2Se5 crystallizes upon thermal annealing with accompanying change in reflectivity. No change in the structure of Ge2As2Se5 is found after annealing.
- 2011-05-25
著者
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Mamedov Nazim
Institute Of Physics Azerbaijan Academy Of Sciences
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Uchiki Hisao
Department Of Electrical Engineering Nagaoka University Of Technology
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Sakamoto Junichi
Department Of Agricultural Chemistry Kyushu University
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Wakita Kazuki
Department of Electrical, Electronics and Computer Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
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Wakita Kazuki
Department of Electrical, Electronics and Computer Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
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Mammadov Eldar
Institute of Physics, Azerbaijan National Academy of Sciences, Baku AZ-1143, Azerbaijan
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Shim Yong-Gu
Department of Physics and Electronics, Osaka Prefecture University, Sakai 599-8531, Japan
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Mamedov Nazim
Institute of Physics, Azerbaijan National Academy of Sciences, Baku AZ-1143, Azerbaijan
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