Disorder at the etched edges of graphene quantum dots (GQD) enables random all-to-all interactions between localized charges in partially-filled Landau levels, providing a potential platform to realize the Sachdev-Ye-Kitaev (SYK) model. We use quantum Hall edge states in the graphene electrodes to measure electrical conductance and thermoelectric power across the GQD. We observe a rapid diminishing of electric conductance fluctuations and slowly decreasing thermoelectric power across the GQD with increasing temperature, consistent with recent theoretical predictions for the SYK regime.
@article{arxiv.2401.08050,
title = {Magneto-Thermoelectric Transport in Graphene Quantum Dot with Strong Correlations},
author = {Laurel E. Anderson and Antti Laitinen and Andrew Zimmerman and Thomas Werkmeister and Leyna Shackleton and Alexander Kruchkov and Takashi Taniguchi and Kenji Watanabe and Subir Sachdev and Philip Kim},
journal= {arXiv preprint arXiv:2401.08050},
year = {2025}
}
Comments
6 pages, 4 main figures; supplement has 24 pages, 10 figures