Two-channel Kondo physics in two-impurity Kondo models
Strongly Correlated Electrons
2012-02-28 v1
Abstract
We consider the non-Fermi liquid quantum critical state of the spin-S two-impurity Kondo model, and its potential realization in a quantum dot device. Using conformal field theory (CFT) and the numerical renormalization group (NRG), we show the critical point to be identical to that of the two-channel Kondo model with additional potential scattering, for any spin-S. Distinct conductance signatures are shown to arise as a function of device asymmetry; with the `smoking gun' square-root behavior, commonly believed to arise at low-energies, dominant only in certain regimes.
Cite
@article{arxiv.1111.6503,
title = {Two-channel Kondo physics in two-impurity Kondo models},
author = {Andrew K. Mitchell and Eran Sela and David E. Logan},
journal= {arXiv preprint arXiv:1111.6503},
year = {2012}
}
Comments
4.5 pages (with 3 figures) + 9 pages (with 4 figures) supplementary material