Tunnelling conductance of $d+ip$-wave superconductor

Abstract

We theoretically investigate the tunneling conductance of the d + ip-wave superconductor which is recently proposed to be realised at the (110) surface of a high-Tc cuprate superconductor. Utilizing the quasiclassical Eilenberger theory, we obtain the self-consistent pair potentials and the differential conductance of the normal-metal/d + ip-wave superconductor junction. We demonstrate that the zero-bias peak of a d-wave superconductor is robust against the spin-triplet p-wave surface subdominant order even though it is fragile against the spin-singlet s-wave one. Comparing our numerical results and the experimental results, we conclude the spin-triplet p-wave surface subdominant order is feasible.