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Thermopower Probe of Fractional Quantum Hall States in Monolayer Graphene
Phys. Rev. Lett. 136, 046502 – Published 27 January, 2026
DOI: https://doi.org/10.1103/8nkb-k8m8
Abstract
Thermopower, through its entropic sensitivity, has recently emerged as a powerful probe of correlated states. Here, we report the first thermopower measurements of fractional quantum Hall (FQH) states in monolayer graphene, a system that can host new correlated states due to its relativistic dispersion relation. Our thermopower measurements reveal FQH states appearing in the and higher Landau levels, including new even denominator states. We employ temperature-dependent magneto-thermopower measurements to extract the energy gaps associated with the more prominent FQH states.