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Quantum Valence Criticality and Superconductivity by Shinji Watanabe; Masatoshi Imada; Kazumasa Miyake is a Materials Science article available to read on EtoBox.

What is Quantum Valence Criticality and Superconductivity about?

The nature of the quantum valence transition is studied on the basis of the periodic Anderson model with Coulomb repulsion between f and conduction electrons. The density matrix renormalization group calculation for the ground state shows that the first-order valence transition emerges with the quantum critical point with diverging valence susceptibility. Instead of the phase separation in the mean-field result, quantum fluctuations generate a wide region of crossover between the Kondo and mixed valence states. It is found that the superconducting correlation is developed in the Kondo regime near the quantum critical point of the valence transition. The origin is ascribed to the enhanced coherent motion of electrons with valence fluctuation. Remarks on the valence transition are given in connection with Ce compounds and Ce metal.

Who reads Quantum Valence Criticality and Superconductivity?

Author

Shinji Watanabe; Masatoshi Imada; Kazumasa Miyake

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-8853)

Published

2007

Language

EN

Field

Materials Science (Physical Sciences)