Unconventional superconductivity in multilayer rhombohedral graphene

Superconductivity has been observed in graphene systems. Among them, rhombohedral graphene has recently emerged as a promising platform for exploring such correlated states. In this work, we report our recent study on the low-temperature transport properties of multilayer rhombohedral graphene. Notably, applying an in-plane magnetic field induces a superconducting phase. Remarkably, the superconductivity exhibits an unexpected enhancement under moderate in-plane magnetic fields, suggesting a possible nontrivial pairing symmetry. This superconducting state displays exotic behavior under the in-plane field, indicating a complex interplay between interactions and pairing mechanisms. Furthermore, this phenomenon appears to be robust across samples with very different layer numbers. These results not only establish rhombohedral graphene as a versatile system for investigating unconventional superconductivity emerging from flat-band correlated physics, but also point toward its potential as a foundation for future superconducting quantum architectures.