Magic-angle twisted bilayer graphene superconducting nano-calorimeter*

Superconducting nano-calorimeters are currently some of the most sensitive sensors for detecting electromagnetic radiation. Two-dimensional materials, thanks to their small heat capacity are progressively evolving into a novel platform to develop a new generation of sensors that can further push the limits of detector sensitivities. Specifically, magic-angle twisted bilayer graphene (MAG) exhibits a record-small heat capacity and a sharp superconducting transition that makes it suitable for superconducting calorimetry. Here we investigate the thermal and optoelectronic properties of the MAG and provide precious insights towards applications. This study establishes MAG as a promising two-dimensional material for ultra-sensitive photodetection.