Effect of Annealing on Optical Absorption of LaAlO3 at Terahertz Frequencies
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概要
- 論文の詳細を見る
Absorption spectra of LaAlO3(100) single crystals were measured at frequencies from 1.0 to 3.5 THz. A new absorption peak appears at ${\sim}3.0$ THz after annealing at temperatures above 500 °C. Simultaneously, striped domains with widths ranging from about 20 to about 300 μm in the original samples completely disappeared. Since oxygen vacancies are assumed to play an important role in the formation of domains, the absorption peak at ${\sim}3.0$ THz seems to be related to oxygen vacancies.
- 2011-02-25
著者
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Ohki Yoshimichi
Department Of Electrical Electronic And Computer Engineering Waseda University
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Mizuno Maya
National Inst. Information And Communications Technol.
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Fukunaga Kaori
National Inst. Information And Communications Technol.
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Nomura Ken-ichi
Department of Electrical Engineering and Bioscience, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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Xie Xiaojun
Department of Electrical Engineering and Bioscience, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
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Mizuno Maya
National Institute of Information and Communications Technology (NICT), 4-2-1 Nukuikitamachi, Koganei, Tokyo 184-8795, Japan
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Okami Shimpei
Department of Electrical Engineering and Bioscience, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
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Nomura Ken-ichi
Department of Electrical Engineering and Bioscience, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
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Fukunaga Kaori
National Institute of Information and Communications Technology (NICT), 4-2-1 Nukuikitamachi, Koganei, Tokyo 184-8795, Japan
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