Reentrant superconductivity through a quantum Lifshitz transition in twisted trilayer graphene

Twisted trilayer graphene has recently been demonstrated to host a robust superconducting phase, with experiments demonstrating a ``reentrant'' phenomenon: large magnetic fields destroy superconductivity, but still larger fields bring it back to life. In this work, the authors use simple insights from theory and experiment to provide an understanding of this phenomenon, along the way arguing that the superconductor is likely to involve a superposition of both singlet and triplet pairing. Many of the conclusions of this study can also be applied to twisted bilayer graphene, and forthcoming experiments should allow these conclusions to be put to the test.