Description
Understanding the nature of superconductivity in magic-angle graphene remains one of the central challenges in moiré quantum matter. A major difficulty lies in disentangling the multiple energy scales emerging from strong electron correlations, particularly the superconducting gap itself. In this talk, I will present simultaneous tunneling spectroscopy and transport measurements on magic-angle twisted trilayer graphene. This combined approach reveals two coexisting V-shaped tunneling gaps with distinct energy scales: a low-energy superconducting gap that vanishes at the critical temperature and magnetic field, and a higher-energy pseudogap that persists beyond. The superconducting spectra exhibit linear gap-filling with temperature and field and display the Volovik effect- signatures of a nodal pairing symmetry. I will also discuss the latest data on the spontaneous symmetry breaking in the superconducting state. These results point to an unconventional superconducting state and establish an experimental platform for multidimensional studies of tunable correlated systems.
