Thermal probe of correlated states in monolayer graphene

Thermopower as a sensitive measure of entropy has recently emerged as a powerful tool to probe correlated states in two-dimensional electron systems. In this talk, I will present the first thermopower measurements of fractional quantum Hall (FQH) states in high-quality monolayer graphene. Remarkably, our results reveal the emergence of new even denominator fractional states in higher Landau levels. Furthermore, I will present the temperature and magnetic field-dependent thermopower data to characterize and further prove the robustness of the observed fractional quantum Hall states.