Advancements in recent years have allowed for the creation of novel heterostructures by overlapping 2D materials, akin to a LEGO game, and in some cases, by rotating them. Research on heterostructures, such as magic-angle twisted bilayer graphene (TBG), has unveiled a plethora of correlated and topological phases, including superconductivity, many of which remain unexplained. Beyond the discovery of unexpected phases, 2D materials offer the ability to engineer new heterostructures with tailored properties.
I will discuss how a topological superconducting state can be induced in TBG encapsulated between ferromagnetic and superconducting 2D materials. This state is made possible by the formation of a moiré pattern in TBG, but the proposed mechanism does not require fine-tuning the twist angle to achieve the magic value. Remarkably, the Chern number, which characterizes the topological superconducting state, can be easily adjusted in situ through doping, strain, or a perpendicular electric field.
