Mott transition and Kondo screening in f-electron metals.
We study how a finite hybridization between a narrow correlated band and a wide conduction band affects the Mott transition. At zero temperature, the hybridization is found to be a relevant perturbation, so that the Mott transition is suppressed by Kondo screening. In contrast, a first-order transition remains at finite temperature, separating a local-moment phase and a Kondo-screened phase. The first-order transition line terminates in two critical end points. Implications for experiments on f-electron materials such as the cerium alloy Ce0.8La0.1Th0.1 are discussed.
de' Medici
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Centre de Physique Théorique, Ecole Polytechnique, 91128 Palaiseau Cedex, France.
Georges
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Kotliar
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Biermann
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