Superconductivity Emerging near Quantum Critical Point of Valence Transition(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• The nature of the quantum valence transition is studied in the one-dimensional periodic Anderson model with Coulomb repulsion between f and conduction electrons by the density-matrix renormalization group method. It is found that the first-order valence transition emerges with the quantum critical point and the crossover from the Kondo to the mixed-valence states is strongly stabilized by quantum fluctuation and electron correlation. It is found that the superconducting correlation is developed in the Kondo regime near the sharp valence increase. The origin of the superconductivity is ascribed to the development of the coherent motion of electrons with enhanced valence fluctuation, which results in the enhancement of the charge velocity, but not of the charge compressibility. Statements on the valence transition in connection with Ce metal and Ce compounds are given.

• 社団法人日本物理学会の論文
• 2006-04-15

著者

• Miyake Kazumasa

  Division Of Endocrine Surgery Kawasaki Medical School.

• Imada Masatoshi

  Institute For Solid State Physics University Of Tokyo

• Miyake Kazumasa

  Division Of Materials Physics Department Of Materials Engineering Science Graduate School Of Enginee

• WATANABE Shinji

  Institute for Solid State Physics, University of Tokyo

• Imada Masatoshi

  Institute For Solid State Physics The University Of Tokyo

• Imada Masatoshi

  Institute For Solid State Physics University Of Tokyo:presto Japan Science And Technology Agency

• Watanabe Shinji

  Univ. Tokyo Tokyo

• Watanabe Shinji

  Institute For Solid State Physics University Of Tokyo

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