The Kondo screening cloud: what can we learn from perturbation theory?

1996/04/30 by Victor Barzykin, Ian Affleck · 1 citation
Physics and Astronomy · #cond-mat

paper · pdf · doi:10.1103/physrevlett.76.4959

4 pages, 2 EPS figures, submitted to PRL; a missing term has been added to Eq. (9); this additional term doesn't effect our main conclusions

arxiv created 1996/05/10 · arxiv updated 2009/11/30

Abstract

We analyse the role which the distance scale ξ_K = v_F/T_K plays in the single-impurity Kondo problem using renormalization group improved perturbation theory. We derive the scaling functions for the local spin susceptibility in various limiting cases. In particular, we demonstrate exactly that the non-oscillating part of it should be short-range, i.e., vanish for distances r ≫ 1/k_F and show explicitly that the interior of the screening cloud \it does not exhibit weak coupling behavior.

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