Kondo Screening in a Magnetically Frustrated Nanostructure: Exact Results on a Stable Non-Fermi-Liquid Phase

Kevin Ingersent, Andreas W. W. Ludwig, and Ian Affleck
Phys. Rev. Lett. 95, 257204 – Published 15 December 2005

Abstract

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.

  • Received 14 July 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.257204

©2005 American Physical Society

Authors & Affiliations

Kevin Ingersent1, Andreas W. W. Ludwig2, and Ian Affleck3

  • 1Department of Physics, University of Florida, Gainesville, Florida 32611, USA
  • 2Department of Physics, University of California, Santa Barbara, California 93106, USA
  • 3Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1

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Issue

Vol. 95, Iss. 25 — 16 December 2005

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