Kondo Physics and Exact Solvability of Double Dots Systems

Details Kondo Physics and Exact Solvability of Double Dots Systems Kondo Physics and Exact Solvability of Double Dots Systems

2006-02-27

arxiv.org/abs/cond-mat/0602617v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures; v2: published form to appear in August 2007 issue of Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.99.076602

We study two double dot systems, one with dots in parallel and one with dots in series, and argue they admit an exact solution via the Bethe ansatz. In the case of parallel dots we exploit the exact solution to extract the behavior of the linear response conductance. The linear response conductance of the parallel dot system possesses multiple Kondo effects, including a Kondo effect enhanced by a nonpertubative antiferromagnetic RKKY interaction, has conductance zeros in the mixed valence regime, and obeys a non-trivial form of the Friedel sum rule.

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