Kondo screening in a magnetically frustrated nanostructure: Exact results on a stable, non-Fermi-liquid phase

Details Kondo screening in a magnetically frustrated nanostructure: Exact results on a stable, non-Fermi-liquid phase Kondo screening in a magnetically frustrated nanostructure: Exact results on a stable, non-Fermi-liquid phase

2005-05-12

arxiv.org/abs/cond-mat/0505303v3

Phys. Rev. Lett. 95, 257204 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, published version (shortened, minor corrections)

Scientific paper

10.1103/PhysRevLett.95.257204

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.

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