Magneto-Thermoelectric Transport in Graphene Quantum Dot with Strong Correlations
arXiv:2401.08050 · doi:10.1103/PhysRevLett.132.246502
Abstract
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.
6 pages, 4 main figures; supplement has 24 pages, 10 figures
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- Sachdev-Ye-Kitaev physics from the Hubbard model: A Floquet engineering approach
- Thermopower across Fermi-volume-changing quantum phase transitions without translational symmetry breaking
- Entanglement production in the Sachdev-Ye-Kitaev Model and its variants
- Noise signatures of a charged Sachdev-Ye-Kitaev dot in mesoscopic transport