Kondo proximity effect: How does a metal penetrate into a Mott insulator?

Details Kondo proximity effect: How does a metal penetrate into a Mott insulator? Kondo proximity effect: How does a metal penetrate into a Mott insulator?

2008-05-05

arxiv.org/abs/0805.0566v1

Phys. Rev. Lett. 101, 066802 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.101.066802

We consider a heterostructure of a metal and a paramagnetic Mott insulator using an adaptation of dynamical mean field theory to describe inhomogeneous systems. The metal can penetrate into the insulator via the Kondo effect. We investigate the scaling properties of the metal-insulator interface close to the critical point of the Mott insulator. At criticality, the quasiparticle weight decays as 1/x^2 with distance x from the metal within our mean field theory. Our numerical results (using the numerical renormalization group as an impurity solver) show that the prefactor of this power law is extremely small.

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