Magnetic Field Induces Superconductivity in Rhombohedral Graphene
Analysis
This paper investigates the fascinating properties of rhombohedral multilayer graphene (RMG), specifically focusing on how in-plane magnetic fields can induce and enhance superconductivity. The discovery of an insulator-superconductor transition driven by a magnetic field, along with the observation of spin-polarized superconductivity and multiple superconducting states, significantly expands our understanding of RMG's phase diagram and provides valuable insights into the underlying mechanisms of superconductivity. The violation of the Pauli limit and the presence of orbital multiferroicity are particularly noteworthy findings.
Key Takeaways
- •Rhombohedral graphene exhibits an insulator-superconductor transition driven by in-plane magnetic fields.
- •The upper critical field violates the Pauli limit, suggesting a spin-polarized superconducting state.
- •Multiple superconducting states are observed in the hole-doped regime.
- •Phases with orbital multiferroicity are found near the charge neutrality point.
“The paper reports an insulator-superconductor transition driven by in-plane magnetic fields, with the upper critical in-plane field of 2T violating the Pauli limit, and an analysis supporting a spin-polarized superconductor.”