Effect of p-pairing symmetry on tunneling conductance in a gapped graphene–superconductor junction

We study the transport properties of a gapped graphene-based normal metal/insulator/p-wave superconductor junction in the limit of a thin barrier. In this work, we aim to study the influence of three types of p-wave superconductivity in tunneling conductance spectra for px, py and px+ipy-pairing symmetry. In particular, the normal conductance is obtained in terms of the bias voltage, eV, the energy gap of graphene, View the MathML source, and also the insulator electrostatic potential, V0, taking realizable experimental data for physical parameters in structure. It is shown that the conductance versus bias voltage for px-symmetry taking into account the superconductor electrostatic potential, U0, exhibits a similar feature as for px+ipy-symmetry. We see that, the step functional behavior of charge carriers depends on the type of p-pair coupling, as similar behavior has been observed in d-wave superconductivity in the same structure.