Surface superconductivity in multilayered rhombohedral graphene: supercurrent
N. B. Kopnin
Low Temperature laboratory, Aalto university, P.O. Box 15100, 00076 Aalto, Finland
L.D. Landau Institute for Theoretical Physics RAS, 117940 Moscow, Russia
The supercurrent for the surface superconductivity of a
flat-band multilayered rhombohedral graphene is calculated.
Despite the absence of dispersion of the excitation spectrum, the
supercurrent is finite. The critical current is proportional to
the zero-temperature superconducting gap, i.e., to the
superconducting critical temperature and to the size of the flat
band in the momentum space.