Fractional Shot Noise in the Kondo Regime

Details Fractional Shot Noise in the Kondo Regime Fractional Shot Noise in the Kondo Regime

2006-03-16

arxiv.org/abs/cond-mat/0603442v1

Phys. Rev. Lett. 97, 086601 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

Low temperature transport through a quantum dot in the Kondo regime proceeds by a universal combination of elastic and inelastic processes, as dictated by the low-energy Fermi-liquid fixed point. We show that as a result of inelastic processes, the charge detected by a shot-noise experiment is enhanced relative to the noninteracting situation to a universal fractional value, $e^*=5/3 e$. Thus, shot noise reveals that the Kondo effect involves many-body features even at low energies, despite its Fermi-liquid nature. We discuss the influence of symmetry breaking perturbations.

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