Superconductivity and Magnetism in Heavy-Fermion Compounds(<SPECIAL TOPICS>Kondo Effect-40 Years after the Discovery)
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概要
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In this contribution we recall some of the early work devoted to Ce-based Kondo alloys which subsequently lead to thorough investigations on so-called "Kondo-lattice" systems like CeAl_2, CeAl_3 and CeCu_2Si_2, subsequently referred to as heavy-fermion metals. We then address the physical properties of the first heavy-fermion superconductor CeCu_2Si_2 and discuss the relationship of its superconductivity with both a spin-density-wave-type quantum critical point and a weak valence transition of Ce that occurs at high pressure. Finally, we introduce the isostructural Kondo-lattice system YbRh_2Si_2, displaying a novel type of quantum critical behavior which appears to be detrimental to superconductivity.
- 2005-01-15
著者
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Steglich F
Max-planck Institute For Chemical Physics Of Solids
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STEGLICH Frank
Max-Planck Institute for Chemical Physics of Solids
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