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Magneto-Thermoelectric Transport in Graphene Quantum Dot with Strong Correlations

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arxiv 2401.08050 v1 pith:IXFDNDCQ submitted 2024-01-16 cond-mat.mes-hall cond-mat.str-el

Laurel E. Anderson , Antti Laitinen , Andrew Zimmerman , Thomas Werkmeister , Leyna Shackleton , Alexander Kruchkov , Takashi Taniguchi , Kenji Watanabe
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Subir Sachdev Philip Kim
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classification cond-mat.mes-hallcond-mat.str-el
keywords graphenequantumacrossconductancepowerthermoelectricall-to-allcharges
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Entanglement production in the Sachdev-Ye-Kitaev Model and its variants

    quant-ph 2025-07 conditional novelty 6.0 of 10

    Entanglement production rates distinguish the spin-SYK model from fermionic SYK and binary SYK, and the differences only become visible at larger system sizes.

  2. Thermopower across Fermi-volume-changing quantum phase transitions without translational symmetry breaking

    cond-mat.str-el 2024-12 conditional novelty 6.0 of 10

    A large-N model of a Fermi-volume-changing transition without symmetry breaking predicts a skewed marginal Fermi liquid with large asymmetric thermopower, matching CeRhIn5 and Nd-LSCO data.

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