Probing unconventional superconductivity in proximitized graphene by impurity scattering
arXiv:1803.04455 · doi:10.1103/PhysRevB.97.214515
Abstract
We demonstrate how potential impurities are a very powerful tool for determining the pairing symmetry in graphene proximity-coupled to a spin-singlet superconductor. All d-wave states are characterized by subgap resonances, with spatial patterns clearly distinguishing between nodal and chiral d-wave symmetry, while s-wave states have no subgap resonances. We also find strong supergap impurity resonances associated with the normal state Dirac point. Sub- and supergap resonances only interact at very low doping levels, then causing suppression of the supergap resonances.
arXiv comment5 pages, 4 figures + supplementary: 5 pages, 9 figures Added references + minor corrections
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- Long-Range Propagation and Interference of -wave Superconducting Pairs in Graphene
- Yu-Shiba-Rusinov States and Ordering of Magnetic Impurities Near the Boundary of a Superconducting Nanowire
- Impurity-induced resonant states in topological nodal-line semimetals