Fractional Entropy of Multichannel Kondo Systems from Conductance-Charge Relations

Cheolhee Han, Z. Iftikhar, Yaakov Kleeorin, A. Anthore, F. Pierre, Yigal Meir, Andrew K. Mitchell, Eran Sela

Research output: Contribution to journalArticlepeer-review

Abstract

Fractional entropy is a signature of nonlocal degrees of freedom, such as Majorana zero modes or more exotic non-Abelian anyons. Although direct experimental measurements remain challenging, Maxwell relations provide an indirect route to the entropy through charge measurements. Here we consider multichannel charge-Kondo systems, which are predicted to host exotic quasiparticles due to a frustration of Kondo screening at low temperatures. In the absence of experimental data for the charge occupation, we derive relations connecting the latter to the conductance, for which experimental results have recently been obtained. Our analysis indicates that Majorana and Fibonacci anyon quasiparticles are well developed in existing two-and three-channel charge-Kondo devices, and that their characteristic kBlog2 and kBlog[(1+5)/2] entropies are experimentally measurable.

Original languageEnglish
Article number146803
JournalPhysical Review Letters
Volume128
Issue number14
DOIs
StatePublished - 8 Apr 2022

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