Orbital-Controlled Superconductivity in f-Electron Systems(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We propose a concept of superconductivity controlled by orbital degree of freedom taking CeMIn_5 (M=Co, Rh, and Ir) as typical examples. A microscopic multiorbital model for CeMIn_5 is analyzed by fluctuation exchange approximation. Even though the Fermi-surface structure is unchanged, the ground state is found to change significantly among paramagnetic, antiferromagnetic, and d-wave superconducting phases, depending on the dominant orbital component in the band near the Fermi energy. We show that our picture naturally explains the different low-temperature properties of CeMIn_5 by carefully analyzing the crystalline electric field states.
- 社団法人日本物理学会の論文
- 2006-08-15
著者
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Hotta Takashi
Tokyo Metropolitan Univ. Tokyo
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Hotta Takashi
Advanced Science Research Center Japan Atomic Energy Agency
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KUBO Katsunori
Advanced Science Research Center, Japan Atomic Energy Agency
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Kubo Katsunori
Japan Atomic Energy Agency Ibaraki
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Kubo Katsunori
Advanced Science Research Center Japan Atomic Energy Agency
関連論文
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