Phys. Rev. Lett. 95, 257204 (2005) [4 pages]Kondo Screening in a Magnetically Frustrated Nanostructure: Exact Results on a Stable Non-Fermi-Liquid PhaseReceived 14 July 2005; published 15 December 2005 Triangular symmetry stabilizes a novel non-Fermi-liquid phase in the three-impurity Kondo model with frustrating antiferromagnetic interactions between half-integer impurity spins. The phase arises without fine-tuning of couplings, and is stable against magnetic fields and particle-hole symmetry breaking. We find a conformal field theory describing this phase, verify it using the numerical renormalization group, and extract various exact, universal low-energy properties. Signatures predicted in electrical transport may be testable in scanning tunneling microscopy or quantum-dot experiments. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.257204
DOI:
10.1103/PhysRevLett.95.257204
PACS:
75.20.Hr, 71.10.Hf, 73.21.La, 75.75.+a
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