Temperature dependence of differential conductance in normal-metal/chiral triplet superconductor junctions: The gap symmetry of Sr2RuO4

The tunneling differential conductance of a normal-metal/chiral spin-triplet superconductor junctions is calculated over whole ranges of temperature and barrier strength within the framework of generalized Blonder-Tinkham-Klapwijk (BTK) theory. We consider three kinds of superconducting gap functions with horizontal line nodes or vertical line nodes, which are currently investigated as the candidate states for Sr2RuO4. In particular, we find that the conductance curves for the fx2-y2-wave state depend seriously on the temperature even at T≪Tc, giving rise to line shapes qualitatively compatible with the existing experimental results.