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The thermopower of a clean two-dimensional electron system is directly proportional to the entropy per charge carrier and can probe strongly interacting quantum phases such as fractional quantum Hall liquids. In particular, thermopower is a valuable parameter to probe the quasiparticle statistics that give rise to excess entropy in certain even-denominator fractional quantum Hall states. Here we demonstrate that the magneto-thermopower detection of fractional quantum Hall states is more sensitive than resistivity measurements. We do this in the context of Bernal-stacked bilayer graphene and highlight several even-denominator states at a relatively low magnetic feld. These capabilities of thermopower measurements support the interest in fractional quantum Hall states for fnding quasiparticles with non-Abelian statistics and elevate bilayer graphene as a promising platform for achieving this.more » « lessFree, publicly-accessible full text available March 17, 2026
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