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Systematic study on the tunneling conductance in a normal-metal/px + y ± ipy − x-wave superconductor junction

The chiral px + y ± ipy − x-wave state is currently considered to be a promising candidate state for Sr2RuO4 in the light of microscopic theories. We theoretically investigate the tunneling conductance in a normal-metal/px + y ± ipy − x-wave superconductor junction over a wide range of temperature and barrier strength. For a cylindrical Fermi surface with the magnitude of the radius R, the px + y ± ipy − x-wave gap function exhibits two typical types of nodal structures when R = 1.0 and , respectively. It is found, in particular, that the line shapes of the conductance spectra for cases can qualitatively account for the existing in-plane tunneling experiments on Sr2RuO4.