November 20th 2025

Paper Alert!

Strongly correlated insulating and superconducting states in moiré graphene remain poorly understood, with growing evidence that electrons may simultaneously behave as localized and extended states. Using local photothermoelectric measurements in symmetrically twisted trilayer graphene, we observe anomalous Seebeck oscillations and photovoltage signatures that deviate from conventional transport theory, pointing to heavy-fermion–like behavior in topological flat bands and establishing thermoelectric probes as a powerful tool for studying correlated quantum materials.

Thanks to all contributed to this work!

Read the full story here: https://www.nature.com/articles/s41567-025-03071-9 (arXiV verion: https://arxiv.org/abs/2402.12296)