Unusual superconductivity could emerge in valley-imbalanced rhombohedral graphene

Researchers at Harvard University and the University of Stuttgart found that valley-imbalanced rhombohedral tetralayer graphene could host unconventional superconducting states. Their paper in Physical Review Letters suggests this material forms a superlattice of Cooper pairs. Mathias Scheurer said, "Our work was inspired by an experiment that showed that superconductivity can emerge."