TY - JOUR
T1 - Fractional Entropy of Multichannel Kondo Systems from Conductance-Charge Relations
AU - Han, Cheolhee
AU - Iftikhar, Z.
AU - Kleeorin, Yaakov
AU - Anthore, A.
AU - Pierre, F.
AU - Meir, Yigal
AU - Mitchell, Andrew K.
AU - Sela, Eran
N1 - Funding Information:
This project received funding from European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme under Grant Agreement No. 951541. A. K. M. acknowledges funding from the Irish Research Council Laureate Awards 2017/2018 through Grant No. IRCLA/2017/169. A. A. and F. P. acknowledge support from the French RENATECH network and the French National Research Agency (ANR-16-CE30-0010-01 and ANR-18-CE47-0014-01). Y. M. acknowledges support by the Israel Science Foundation (Grant No. 3523/2020). E. S. acknowledges support from ARO (W911NF-20-1-0013), the Israel Science Foundation Grant No. 154/19 and US-Israel Binational Science Foundation (Grant No. 2016255).
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/4/8
Y1 - 2022/4/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85128769941&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.128.146803
DO - 10.1103/PhysRevLett.128.146803
M3 - Article
C2 - 35476492
AN - SCOPUS:85128769941
VL - 128
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
M1 - 146803
ER -