Off-Centre Instability of Cu^+ Ions in Alkali Chlorides Due to a Charge-Transfer Excitation
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概要
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The off-centre instability, the frequency of the resonant mode, the peak energy of theabsorption band of the Cu" impurity ton, and their lattice constant dependence havebeen calcuated using the Curl,-cluster model in alkali chlorides, allowing for mixingbetween the ground state and a Cl -+Cu" charge-transfer excitation state. Themagnitude of the state mixing has been determined by using the experimental peakenergy of the Cu" band in LiCl and Nail. The results can be compared favorably withexperiments through all the alkali chlorides. As the lattice constant increases, thenormal lattice site becomes unstable for the impurity ion, and the most stable off-centreposition appears at first along the (111 >, then along the (110), and finally along the<(100) axes.
- 社団法人日本物理学会の論文
- 1982-03-15
著者
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Nagasaka Shin-ichiro
Department Of Physics Faculty Of Science Yamagata University
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Nagasaka Shin-ichiro
Department of Physics,Faculty of Science,Yamagata University
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