Resolving spectral gaps and many-body resonances in superconducting twisted trilayer graphene

Magic-angle twisted trilayer graphene (MATTG) exhibits a plethora of strongly correlated electronic phases that spontaneously break it's underlying symmetries. Despite great experimental efforts, the microscopic nature of these phases and their relationship to emerging-superconductivity in this system are still elusive. In this talk, I will present our latest scanning tunneling microscopy MATTG experiments that focus on tracking the formation of correlated phases preceding superconductivity. Surprisingly, in a certain range of filling factors within the superconducting dome, we discover the existence of two well-resolved gaps pinned at the Fermi level. While the outer gap, previously associated with the pseudo gap phase, persists at high temperatures and magnetic fields, the newly revealed inner gap is more fragile in line with superconductivity MATTG transport experiments. I will discuss several additional measurements that further corroborate the superconducting nature of the inner gap and strongly suggest that the outer gap originates from the splitting of the Abrikosov-Suhl-Kondoresonance due to the breaking of the valley symmetry that establishes intervalley coherent order. Our results suggest an intricate but tractable hierarchy of correlated phases in MATTG set by the interplay of dynamic correlations, intervalley coherence and superconductivity.