Effective Hamiltonian for Charge-Ordered Yb_4As_3 : Condensed Matter: Electronic Properties, etc.
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概要
- 論文の詳細を見る
Yb_4As_3 is a 4f compound showing a heavy-fermion-like behavior in spite of its low carrier concentration. Previous studies have shown that Yb^<3+> chains are formed along <111> below the charge ordering temperature T_c = 290 K. In this paper an effective Hamiltonian to describe the low-energy physics of the Yb^<3+> chain is derived by properly taking into account its unique structure. The resulting Hamiltonian is surprisingly simple, showing a hidden symmetry previously unnoticed. In addition it gives a support to a recent work by Oshikawa et al., which emphasizes the importance of the Dzyaloshinsky-Moriya term. It is also pointed out that the structure of the Yb^<3+> chain leads to a mixing between the almost localized 4f state and the 5d electron-like carriers.
- 社団法人日本物理学会の論文
- 2000-05-15
著者
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SAKAI Osamu
Department of Physics, Tokyo Metropolitan University
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SHIBA Hiroyuki
Department of Physics, Kobe University
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Ueda K
Toyota Technological Inst. Nagoya Jpn
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UEDA Kazuo
Institute for Solid State Physics, University of Tokyo
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Ueda K
Institute For Solid State Physics University Of Tokyo
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Shiba Hiroyuki
Department Of Physics Kobe University
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Sakai Osamu
Department Of Electronic Science And Engineering Kyoto University
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Sakai Osamu
Department Of Cardiovascular Surgery Kyoto Prefectural University Of Medicine
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Shiba Hiroyuki
Department Of Computer Science Gunma University Faculty Of Engineering
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Ueda Kazuo
Institiute For Solid State Physics University Of Tokyo
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