Charge Fractionalization in the Two-Channel Kondo Effect

L. Aviad Landau, Eyal Cornfeld, Eran Sela

Research output: Contribution to journalArticlepeer-review

Abstract

The phenomenon of charge fractionalization describes the emergence of novel excitations with fractional quantum numbers, as predicted in strongly correlated systems such as spin liquids. We elucidate that precisely such an unusual effect may occur in the simplest possible non-Fermi liquid, the two-channel Kondo effect. To bring this concept down to experimental test, we study nonequilibrium transport through a device realizing the charge two-channel Kondo critical point in a recent experiment by Iftikhar et al. [Nature (London) 526, 233 (2015)NATUAS0028-083610.1038/nature15384]. The shot noise at low voltages is predicted to result in a universal Fano factor e∗/e=1/2. This allows us to experimentally identify elementary transport processes of emergent fermions carrying half-integer charge.

Original languageEnglish
Article number186801
JournalPhysical Review Letters
Volume120
Issue number18
DOIs
StatePublished - 4 May 2018

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