Theory of the Hybridization Gap in Ce Compounds with Crystalline Electric Field Splitting
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概要
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We invastigate the general properties of the hybridization gap in Ce compounds focusing on the case with orthorhombic structure. In the study we use the periodic Anderson model possessing Knamers doublets in f level and mainly discuss the hybridization between one of Kramers doublets and a conduction band. In higher symmetry such as cubic, tetragonal and hexagonal structure, the f-state with J_z = ±1/2 component becomes insulating state with a real energy gap near the f-level. In lower symmetry such as orthorhombic structure, although f-states contain the component of J_z = ±1/2 semimetallic states with pseudogap or metallic states with a peak are realized in specific f states.
- 社団法人日本物理学会の論文
- 2003-08-15
著者
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Yamada Kotaro
Department Of Engineering Hiroshima University
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YAMADA Kosaku
Department of Physics, Kyoto University
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Yamada Kosaku
Department Of Mechanical Engineering Faculty Of Engineering Kagoshima University
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MIYAZAWA Morio
Department of Physics,Faculty of Science,Kyoto University
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Miyazawa Morio
Department Of Physics Kyoto University
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Miyazawa Morio
Department Of Physics Faculty Of Science Kyoto University
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