Electronic Structure and Auger-Free Luminescence in Cs2ZnCl4 Crystals
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概要
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On the basis of the electronic structure determined from measurements of reflection and X-ray photoelectron spectra, Auger-free luminescence (AFL) of Cs2ZnCl4 has been studied under the outermost-core band excitation in a temperature range of 10--300 K. A band is found at 4.8 eV, in addition to the 3.3 and 4.2 eV bands observed previously. The present study clarifies that the 4.8 eV band, as well as the 3.3 and 4.2 eV bands, originates from the Auger-free transition between the Cs 5p outermost-core band and the Cl 3p valence band. When the sample temperature is increased, spectral widths of the 3.3 and 4.8 eV bands become broadened, while that of the 4.2 eV band is almost kept unchanged. This suggests that the core hole created on a Cs+ ion interacts with the surrounding lattice vibration. The decay profiles are found to be essentially the same for all the AFL bands. Three-peaked structure of AFL is discussed in comparison with experimental and theoretical results in CsCl.
- 2012-11-15
著者
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KITAURA Mamoru
Department of Electrical and Electronics Engineering,Faculty of Engineering,Fukui University
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Itoh Minoru
Department Of Animal Husbandry Faculty Of Agriculture Tohoku University:(present Adress) National In
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Ohnishi Akimasa
Department Of Physics Faculty Of Science Yamagata University
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Sasaki Minoru
Department Of Acoustic Design Kyushu Institute Of Design
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Itoh Minoru
Department of Electrical and Electronic Engineering, Shinshu University, Nagano 380-8553, Japan
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Kitaura Mamoru
Department of Physics, Yamagata University, Yamagata 990-8560, Japan
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Ohnishi Akimasa
Department of Physics, Yamagata University, Yamagata 990-8560, Japan
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