Kondo effect in crossed Luttinger liquids

Details Kondo effect in crossed Luttinger liquids Kondo effect in crossed Luttinger liquids

1999-10-23

arxiv.org/abs/cond-mat/9910372v1

Phys. Rev. B 61, 1853 (2000).

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, RevteX, to be published in Physical Review B

Scientific paper

10.1103/PhysRevB.61.1853

We study the Kondo effect in two crossed Luttinger liquids, using Boundary Conformal Field Theory. We predict two types of critical behaviors: either a two-channel Kondo fixed point with a nonuniversal Wilson ratio, or a new theory with an anomalous response identical to that found by Furusaki and Nagaosa (for the Kondo effect in a single Luttinger liquid). Moreover, we discuss the relevance of perturbations like channel anisotropy, and we make links with the Kondo effect in a two-band Hubbard system modeled by a channel-dependent Luttinger Hamiltonian. The suppression of backscattering off the impurity produces a model similar to the four-channel Kondo theory.

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