Electron Cotunneling into a Kondo Lattice

Details Electron Cotunneling into a Kondo Lattice Electron Cotunneling into a Kondo Lattice

2009-10-07

arxiv.org/abs/0910.1138v1

Phys. Rev. Lett. 103, 206402 (2009).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 eps figures

Scientific paper

10.1103/PhysRevLett.103.206402

Motivated by recent experimental interest in tunneling into heavy electron materials, we present a theory for electron tunneling into a Kondo lattice. The passage of an electron into the Kondo lattice is accompanied by a simultaneous spin flip of the localized moments via cotunneling mechanism. We compute the tunneling current with the large-$N$ mean field theory. In the absence of disorder, differential tunneling conductance exhibits two peaks separated by the hybridization gap. Disorder effects lead to the smearing of the gap resulting in a Fano lineshape.

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