Detecting nonunitary multiorbital superconductivity with Dirac points at finite energies

Determining the symmetry of the order parameter of unconventional superconductors remains a recurrent topic in strongly correlated electron physics. Here the authors show that gap openings in Dirac crossings away from the chemical potential are a signature of non-unitary multiorbital superconductivity. These findings show that angle-resolved photo-emission spectroscopy measurements can be used to detect non-unitary multiorbital superconductivity in materials hosting Dirac crossings, such as iron chalcogenides and twisted graphene multilayers