Two-channel Kondo physics in two-impurity Kondo models.

Journal article

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 and the numerical renormalization group, 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 square-root behavior commonly believed to arise at low-energies dominant only in certain regimes.

Authors: Mitchell, A; Sela, E; Logan, D

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 108
• Issue: 8
• Pages: 086405
• Publication date: 2012-02-01
• DOI: 10.1103/physrevlett.108.086405
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English