Kondo Effect in a Luttinger Liquid: Exact Results from Conformal Field Theory

Details Kondo Effect in a Luttinger Liquid: Exact Results from Conformal Field Theory Kondo Effect in a Luttinger Liquid: Exact Results from Conformal Field Theory

1995-05-23

arxiv.org/abs/cond-mat/9505100v1

Phys. Rev. Lett. 75, 300 (1995)

Physics

Condensed Matter

9 pages, REVTeX, uses amsfonts, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.75.300

We report on exact results for the low-temperature thermodynamics of a spin-$\frac{1}{2}$ magnetic impurity coupled to a one-dimensional interacting electron system. By using boundary conformal field theory, we show that there are only two types of critical behaviors consistent with the symmetries of the problem: {\em either} a local Fermi liquid, {\em or} a theory with an anomalous response identical to that recently proposed by Furusaki and Nagaosa. Suppression of back scattering off the impurity leads to the same critical properties as for the two-channel Kondo effect.

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